Use-after-free vulnerability in the vmxnet3_io_bar0_write function in hw/net/vmxnet3.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (QEMU instance crash) by leveraging failure to check if the device is active.

Several vulnerabilities were found in qemu, a fast processor emulator :

CVE-2015-8666

Heap-based buffer overflow in QEMU when built with the Q35-chipset-based PC system emulator

CVE-2016-2198

NULL pointer dereference in ehci_caps_write in the USB EHCI support that may result in denial of service

CVE-2016-6833

Use after free while writing in the vmxnet3 device that could be used to cause a denial of service

CVE-2016-6835

Buffer overflow in vmxnet_tx_pkt_parse_headers() in vmxnet3 device that could result in denial of service

CVE-2016-8576

Infinite loop vulnerability in xhci_ring_fetch in the USB xHCI support

CVE-2016-8667 / CVE-2016-8669

Divide by zero errors in set_next_tick in the JAZZ RC4030 chipset emulator, and in serial_update_parameters of some serial devices, that could result in denial of service

CVE-2016-9602

Improper link following with VirtFS

CVE-2016-9603

Heap buffer overflow via vnc connection in the Cirrus CLGD 54xx VGA emulator support

CVE-2016-9776

Infinite loop while receiving data in the ColdFire Fast Ethernet Controller emulator

CVE-2016-9907

Memory leakage in the USB redirector usb-guest support 

CVE-2016-9911

Memory leakage in ehci_init_transfer in the USB EHCI support

CVE-2016-9914 / CVE-2016-9915 / CVE-2016-9916

Plan 9 File System (9pfs): add missing cleanup operation in FileOperations, in the handle backend and in the proxy backend driver

CVE-2016-9921 / CVE-2016-9922

Divide by zero in cirrus_do_copy in the Cirrus CLGD 54xx VGA Emulator support 

CVE-2016-10155

Memory leak in hw/watchdog/wdt_i6300esb.c allowing local guest OS privileged users to cause a denial of service via a large number of device unplug operations.

CVE-2017-2615 / CVE-2017-2620 / CVE-2017-18030 / CVE-2018-5683 / CVE-2017-7718

Out-of-bounds access issues in the Cirrus CLGD 54xx VGA emulator support, that could result in denial of service

CVE-2017-5525 / CVE-2017-5526

Memory leakage issues in the ac97 and es1370 device emulation

CVE-2017-5579

Most memory leakage in the 16550A UART emulation

CVE-2017-5667

Out-of-bounds access during multi block SDMA transfer in the SDHCI emulation support.

CVE-2017-5715

Mitigations against the Spectre v2 vulnerability. For more information please refer to https://www.qemu.org/2018/01/04/spectre/

CVE-2017-5856

Memory leak in the MegaRAID SAS 8708EM2 Host Bus Adapter emulation support

CVE-2017-5973 / CVE-2017-5987 / CVE-2017-6505

Infinite loop issues in the USB xHCI, in the transfer mode register of the SDHCI protocol, and the USB ohci_service_ed_list

CVE-2017-7377

9pfs: host memory leakage via v9fs_create

CVE-2017-7493

Improper access control issues in the host directory sharing via 9pfs support.

CVE-2017-7980

Heap-based buffer overflow in the Cirrus VGA device that could allow local guest OS users to execute arbitrary code or cause a denial of service

CVE-2017-8086

9pfs: host memory leakage via v9pfs_list_xattr

CVE-2017-8112

Infinite loop in the VMWare PVSCSI emulation

CVE-2017-8309 / CVE-2017-8379

Host memory leakage issues via the audio capture buffer and the keyboard input event handlers 

CVE-2017-9330

Infinite loop due to incorrect return value in USB OHCI that may result in denial of service

CVE-2017-9373 / CVE-2017-9374

Host memory leakage during hot unplug in IDE AHCI and USB emulated devices that could result in denial of service

CVE-2017-9503

NULL pointer dereference while processing megasas command

CVE-2017-10806

Stack buffer overflow in USB redirector

CVE-2017-10911

Xen disk may leak stack data via response ring

CVE-2017-11434

Out-of-bounds read while parsing Slirp/DHCP options

CVE-2017-14167

Out-of-bounds access while processing multiboot headers that could result in the execution of arbitrary code

CVE-2017-15038

9pfs: information disclosure when reading extended attributes

CVE-2017-15289

Out-of-bounds write access issue in the Cirrus graphic adaptor that could result in denial of service

CVE-2017-16845

Information leak in the PS/2 mouse and keyboard emulation support that could be exploited during instance migration 

CVE-2017-18043

Integer overflow in the macro ROUND_UP (n, d) that could result in denial of service

CVE-2018-7550

Incorrect handling of memory during multiboot that could may result in execution of arbitrary code

For Debian 8 'Jessie', these problems have been fixed in version 1:2.1+dfsg-12+deb8u7.

We recommend that you upgrade your qemu packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

qemu was updated to fix 21 security issues. These security issues were fixed :

  - CVE-2014-5388: Off-by-one error in the pci_read function     in the ACPI PCI hotplug interface (hw/acpi/pcihp.c) in     QEMU allowed local guest users to obtain sensitive     information and have other unspecified impact related to     a crafted PCI device that triggers memory corruption     (bsc#893323).

  - CVE-2015-6815: e1000 NIC emulation support was     vulnerable to an infinite loop issue. A privileged user     inside guest could have used this flaw to crash the Qemu     instance resulting in DoS. (bsc#944697).

  - CVE-2016-2391: The ohci_bus_start function in the USB     OHCI emulation support (hw/usb/hcd-ohci.c) in QEMU     allowed local guest OS administrators to cause a denial     of service (NULL pointer dereference and QEMU process     crash) via vectors related to multiple eof_timers     (bsc#967013).

  - CVE-2016-2392: The is_rndis function in the USB Net     device emulator (hw/usb/dev-network.c) in QEMU did not     properly validate USB configuration descriptor objects,     which allowed local guest OS administrators to cause a     denial of service (NULL pointer dereference and QEMU     process crash) via vectors involving a remote NDIS     control message packet (bsc#967012).

  - CVE-2016-4453: The vmsvga_fifo_run function in     hw/display/vmware_vga.c in QEMU allowed local guest OS     administrators to cause a denial of service (infinite     loop and QEMU process crash) via a VGA command     (bsc#982223).

  - CVE-2016-4454: The vmsvga_fifo_read_raw function in     hw/display/vmware_vga.c in QEMU allowed local guest OS     administrators to obtain sensitive host memory     information or cause a denial of service (QEMU process     crash) by changing FIFO registers and issuing a VGA     command, which triggers an out-of-bounds read     (bsc#982222).

  - CVE-2016-5105: The megasas_dcmd_cfg_read function in     hw/scsi/megasas.c in QEMU, when built with MegaRAID SAS     8708EM2 Host Bus Adapter emulation support, used an     uninitialized variable, which allowed local guest     administrators to read host memory via vectors involving     a MegaRAID Firmware Interface (MFI) command     (bsc#982017).

  - CVE-2016-5106: The megasas_dcmd_set_properties function     in hw/scsi/megasas.c in QEMU, when built with MegaRAID     SAS 8708EM2 Host Bus Adapter emulation support, allowed     local guest administrators to cause a denial of service     (out-of-bounds write access) via vectors involving a     MegaRAID Firmware Interface (MFI) command (bsc#982018).

  - CVE-2016-5107: The megasas_lookup_frame function in     QEMU, when built with MegaRAID SAS 8708EM2 Host Bus     Adapter emulation support, allowed local guest OS     administrators to cause a denial of service     (out-of-bounds read and crash) via unspecified vectors     (bsc#982019).

  - CVE-2016-5126: Heap-based buffer overflow in the     iscsi_aio_ioctl function in block/iscsi.c in QEMU     allowed local guest OS users to cause a denial of     service (QEMU process crash) or possibly execute     arbitrary code via a crafted iSCSI asynchronous I/O     ioctl call (bsc#982285).

  - CVE-2016-5238: The get_cmd function in hw/scsi/esp.c in     QEMU allowed local guest OS administrators to cause a     denial of service (out-of-bounds write and QEMU process     crash) via vectors related to reading from the     information transfer buffer in non-DMA mode     (bsc#982959).

  - CVE-2016-5337: The megasas_ctrl_get_info function in     hw/scsi/megasas.c in QEMU allowed local guest OS     administrators to obtain sensitive host memory     information via vectors related to reading device     control information (bsc#983961).

  - CVE-2016-5338: The (1) esp_reg_read and (2)     esp_reg_write functions in hw/scsi/esp.c in QEMU allowed     local guest OS administrators to cause a denial of     service (QEMU process crash) or execute arbitrary code     on the QEMU host via vectors related to the information     transfer buffer (bsc#983982).

  - CVE-2016-5403: The virtqueue_pop function in     hw/virtio/virtio.c in QEMU allowed local guest OS     administrators to cause a denial of service (memory     consumption and QEMU process crash) by submitting     requests without waiting for completion (bsc#991080).

  - CVE-2016-6490: Infinite loop in the virtio framework. A     privileged user inside the guest could have used this     flaw to crash the Qemu instance on the host resulting in     DoS (bsc#991466).

  - CVE-2016-6833: Use-after-free issue in the VMWARE     VMXNET3 NIC device support. A privileged user inside     guest could have used this issue to crash the Qemu     instance resulting in DoS (bsc#994774).

  - CVE-2016-6836: VMWARE VMXNET3 NIC device support was     leaging information leakage. A privileged user inside     guest could have used this to leak host memory bytes to     a guest (bsc#994760).

  - CVE-2016-6888: Integer overflow in packet initialisation     in VMXNET3 device driver. A privileged user inside guest     could have used this flaw to crash the Qemu instance     resulting in DoS (bsc#994771).

  - CVE-2016-7116: Host directory sharing via Plan 9 File     System(9pfs) was vulnerable to a directory/path     traversal issue. A privileged user inside guest could     have used this flaw to access undue files on the host     (bsc#996441).

  - CVE-2016-7155: In the VMWARE PVSCSI paravirtual SCSI bus     a OOB access and/or infinite loop issue could have     allowed a privileged user inside guest to crash the Qemu     process resulting in DoS (bsc#997858).

  - CVE-2016-7156: In the VMWARE PVSCSI paravirtual SCSI bus     a infinite loop issue could have allowed a privileged     user inside guest to crash the Qemu process resulting in     DoS (bsc#997859).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3125-1 advisory.

    Zhenhao Hong discovered that QEMU incorrectly handled the Virtio module. A privileged attacker inside the     guest could use this issue to cause QEMU to consume resources, resulting in a denial of service.
    (CVE-2016-5403)

    Li Qiang discovered that QEMU incorrectly handled VMWARE VMXNET3 network card emulation support. A     privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of     service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-6833,     CVE-2016-6834, CVE-2016-6888)

    Li Qiang discovered that QEMU incorrectly handled VMWARE VMXNET3 network card emulation support. A     privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of     service, or possibly execute arbitrary code on the host. In the default installation, when QEMU is used     with libvirt, attackers would be isolated by the libvirt AppArmor profile. This issue only affected Ubuntu     14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-6835)

    Li Qiang discovered that QEMU incorrectly handled VMWARE VMXNET3 network card emulation support. A     privileged attacker inside the guest could use this issue to possibly to obtain sensitive host memory.
    This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-6836)

    Felix Wilhelm discovered that QEMU incorrectly handled Plan 9 File System (9pfs) support. A privileged     attacker inside the guest could use this issue to possibly to obtain sensitive host files. (CVE-2016-7116)

    Li Qiang and Tom Victor discovered that QEMU incorrectly handled VMWARE PVSCSI paravirtual SCSI bus     emulation support. A privileged attacker inside the guest could use this issue to cause QEMU to crash,     resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu     16.10. (CVE-2016-7155)

    Li Qiang discovered that QEMU incorrectly handled VMWARE PVSCSI paravirtual SCSI bus emulation support. A     privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of     service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-7156,     CVE-2016-7421)

    Tom Victor discovered that QEMU incorrectly handled LSI SAS1068 host bus emulation support. A privileged     attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service.
    This issue only affected Ubuntu 16.10. (CVE-2016-7157)

    Hu Chaojian discovered that QEMU incorrectly handled xlnx.xps-ethernetlite emulation support. A privileged     attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service,     or possibly execute arbitrary code on the host. In the default installation, when QEMU is used with     libvirt, attackers would be isolated by the libvirt AppArmor profile. (CVE-2016-7161)

    Qinghao Tang and Li Qiang discovered that QEMU incorrectly handled the VMWare VGA module. A privileged     attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service.
    (CVE-2016-7170)

    Qinghao Tang and Zhenhao Hong discovered that QEMU incorrectly handled the Virtio module. A privileged     attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service.
    This issue only affected Ubuntu 16.10. (CVE-2016-7422)

    Li Qiang discovered that QEMU incorrectly handled LSI SAS1068 host bus emulation support. A privileged     attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service.
    This issue only affected Ubuntu 16.10. (CVE-2016-7423)

    Li Qiang discovered that QEMU incorrectly handled USB xHCI controller emulation support. A privileged     attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service.
    This issue only affected Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-7466)

    Li Qiang discovered that QEMU incorrectly handled ColdFire Fast Ethernet Controller emulation support. A     privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of     service. (CVE-2016-7908)

    Li Qiang discovered that QEMU incorrectly handled AMD PC-Net II emulation support. A privileged attacker     inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service.
    (CVE-2016-7909)

    Li Qiang discovered that QEMU incorrectly handled the Virtio GPU support. A privileged attacker inside the     guest could use this issue to cause QEMU to consume resources, resulting in a denial of service. This     issue only affected Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-7994)

    Li Qiang discovered that QEMU incorrectly handled USB EHCI emulation support. A privileged attacker inside     the guest could use this issue to cause QEMU to consume resources, resulting in a denial of service. This     issue only affected Ubuntu 16.10. (CVE-2016-7995)

    Li Qiang discovered that QEMU incorrectly handled USB xHCI controller support. A privileged attacker     inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue     only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-8576)

    Li Qiang discovered that QEMU incorrectly handled Plan 9 File System (9pfs) support. A privileged attacker     inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue     only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-8577, CVE-2016-8578)

    It was discovered that QEMU incorrectly handled Rocker switch emulation support. A privileged attacker     inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue     only affected Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-8668)

    It was discovered that QEMU incorrectly handled Intel HDA controller emulation support. A privileged     attacker inside the guest could use this issue to cause QEMU to consume resources, resulting in a denial     of service. (CVE-2016-8909)

    Andrew Henderson discovered that QEMU incorrectly handled RTL8139 ethernet controller emulation support. A     privileged attacker inside the guest could use this issue to cause QEMU to consume resources, resulting in     a denial of service. (CVE-2016-8910)

    Li Qiang discovered that QEMU incorrectly handled Intel i8255x ethernet controller emulation support. A     privileged attacker inside the guest could use this issue to cause QEMU to consume resources, resulting in     a denial of service. (CVE-2016-9101)

    Li Qiang discovered that QEMU incorrectly handled Plan 9 File System (9pfs) support. A privileged attacker     inside the guest could use this issue to cause QEMU to consume resources, resulting in a denial of     service. (CVE-2016-9102, CVE-2016-9104, CVE-2016-9105)

    Li Qiang discovered that QEMU incorrectly handled Plan 9 File System (9pfs) support. A privileged attacker     inside the guest could use this issue to possibly to obtain sensitive host memory. (CVE-2016-9103)

    Li Qiang discovered that QEMU incorrectly handled Plan 9 File System (9pfs) support. A privileged attacker     inside the guest could use this issue to cause QEMU to consume resources, resulting in a denial of     service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-9106)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

qemu was updated to fix 19 security issues.

These security issues were fixed :

  - CVE-2016-2392: The is_rndis function in the USB Net     device emulator (hw/usb/dev-network.c) in QEMU did not     properly validate USB configuration descriptor objects,     which allowed local guest OS administrators to cause a     denial of service (NULL pointer dereference and QEMU     process crash) via vectors involving a remote NDIS     control message packet (bsc#967012)

  - CVE-2016-2391: The ohci_bus_start function in the USB     OHCI emulation support (hw/usb/hcd-ohci.c) in QEMU     allowed local guest OS administrators to cause a denial     of service (NULL pointer dereference and QEMU process     crash) via vectors related to multiple eof_timers     (bsc#967013)

  - CVE-2016-5106: The megasas_dcmd_set_properties function     in hw/scsi/megasas.c in QEMU, when built with MegaRAID     SAS 8708EM2 Host Bus Adapter emulation support, allowed     local guest administrators to cause a denial of service     (out-of-bounds write access) via vectors involving a     MegaRAID Firmware Interface (MFI) command (bsc#982018)

  - CVE-2016-5105: The megasas_dcmd_cfg_read function in     hw/scsi/megasas.c in QEMU, when built with MegaRAID SAS     8708EM2 Host Bus Adapter emulation support, used an     uninitialized variable, which allowed local guest     administrators to read host memory via vectors involving     a MegaRAID Firmware Interface (MFI) command (bsc#982017)

  - CVE-2016-5107: The megasas_lookup_frame function in     QEMU, when built with MegaRAID SAS 8708EM2 Host Bus     Adapter emulation support, allowed local guest OS     administrators to cause a denial of service     (out-of-bounds read and crash) via unspecified vectors     (bsc#982019)

  - CVE-2016-5126: Heap-based buffer overflow in the     iscsi_aio_ioctl function in block/iscsi.c in QEMU     allowed local guest OS users to cause a denial of     service (QEMU process crash) or possibly execute     arbitrary code via a crafted iSCSI asynchronous I/O     ioctl call (bsc#982285)

  - CVE-2016-4454: The vmsvga_fifo_read_raw function in     hw/display/vmware_vga.c in QEMU allowed local guest OS     administrators to obtain sensitive host memory     information or cause a denial of service (QEMU process     crash) by changing FIFO registers and issuing a VGA     command, which triggers an out-of-bounds read     (bsc#982222)

  - CVE-2016-4453: The vmsvga_fifo_run function in     hw/display/vmware_vga.c in QEMU allowed local guest OS     administrators to cause a denial of service (infinite     loop and QEMU process crash) via a VGA command     (bsc#982223)

  - CVE-2016-5338: The (1) esp_reg_read and (2)     esp_reg_write functions in hw/scsi/esp.c in QEMU allowed     local guest OS administrators to cause a denial of     service (QEMU process crash) or execute arbitrary code     on the QEMU host via vectors related to the information     transfer buffer (bsc#983982)

  - CVE-2016-5337: The megasas_ctrl_get_info function in     hw/scsi/megasas.c in QEMU allowed local guest OS     administrators to obtain sensitive host memory     information via vectors related to reading device     control information (bsc#983961)

  - CVE-2016-5238: The get_cmd function in hw/scsi/esp.c in     QEMU allowed local guest OS administrators to cause a     denial of service (out-of-bounds write and QEMU process     crash) via vectors related to reading from the     information transfer buffer in non-DMA mode (bsc#982959)

  - CVE-2016-5403: The virtqueue_pop function in     hw/virtio/virtio.c in QEMU allowed local guest OS     administrators to cause a denial of service (memory     consumption and QEMU process crash) by submitting     requests without waiting for completion (bsc#991080)

  - CVE-2016-6490: Infinite loop in the virtio framework. A     privileged user inside the guest could have used this     flaw to crash the Qemu instance on the host resulting in     DoS (bsc#991466)

  - CVE-2016-6888: Integer overflow in packet initialisation     in VMXNET3 device driver. A privileged user inside guest     could have used this flaw to crash the Qemu instance     resulting in DoS (bsc#994771)

  - CVE-2016-6833: Use-after-free issue in the VMWARE     VMXNET3 NIC device support. A privileged user inside     guest could have used this issue to crash the Qemu     instance resulting in DoS (bsc#994774)

  - CVE-2016-7116: Host directory sharing via Plan 9 File     System(9pfs) was vulnerable to a directory/path     traversal issue. A privileged user inside guest could     have used this flaw to access undue files on the host     (bsc#996441)

  - CVE-2016-6836: VMWARE VMXNET3 NIC device support was     leaging information leakage. A privileged user inside     guest could have used this to leak host memory bytes to     a guest (bsc#994760)

  - CVE-2016-7155: In the VMWARE PVSCSI paravirtual SCSI bus     a OOB access and/or infinite loop issue could have     allowed a privileged user inside guest to crash the Qemu     process resulting in DoS (bsc#997858)

  - CVE-2016-7156: In the VMWARE PVSCSI paravirtual SCSI bus     a infinite loop issue could have allowed a privileged     user inside guest to crash the Qemu process resulting in     DoS (bsc#997859)

This non-security issue was fixed :

  - bsc#1000048: Fix migration failure where target host is     a soon to be released SLES 12 SP2. Qemu's spice code     gets an assertion.

This update was imported from the SUSE:SLE-12-SP1:Update update project.

qemu was updated to fix 19 security issues. These security issues were fixed :

  - CVE-2016-2392: The is_rndis function in the USB Net     device emulator (hw/usb/dev-network.c) in QEMU did not     properly validate USB configuration descriptor objects,     which allowed local guest OS administrators to cause a     denial of service (NULL pointer dereference and QEMU     process crash) via vectors involving a remote NDIS     control message packet (bsc#967012)

  - CVE-2016-2391: The ohci_bus_start function in the USB     OHCI emulation support (hw/usb/hcd-ohci.c) in QEMU     allowed local guest OS administrators to cause a denial     of service (NULL pointer dereference and QEMU process     crash) via vectors related to multiple eof_timers     (bsc#967013)

  - CVE-2016-5106: The megasas_dcmd_set_properties function     in hw/scsi/megasas.c in QEMU, when built with MegaRAID     SAS 8708EM2 Host Bus Adapter emulation support, allowed     local guest administrators to cause a denial of service     (out-of-bounds write access) via vectors involving a     MegaRAID Firmware Interface (MFI) command (bsc#982018)

  - CVE-2016-5105: The megasas_dcmd_cfg_read function in     hw/scsi/megasas.c in QEMU, when built with MegaRAID SAS     8708EM2 Host Bus Adapter emulation support, used an     uninitialized variable, which allowed local guest     administrators to read host memory via vectors involving     a MegaRAID Firmware Interface (MFI) command (bsc#982017)

  - CVE-2016-5107: The megasas_lookup_frame function in     QEMU, when built with MegaRAID SAS 8708EM2 Host Bus     Adapter emulation support, allowed local guest OS     administrators to cause a denial of service     (out-of-bounds read and crash) via unspecified vectors     (bsc#982019)

  - CVE-2016-5126: Heap-based buffer overflow in the     iscsi_aio_ioctl function in block/iscsi.c in QEMU     allowed local guest OS users to cause a denial of     service (QEMU process crash) or possibly execute     arbitrary code via a crafted iSCSI asynchronous I/O     ioctl call (bsc#982285)

  - CVE-2016-4454: The vmsvga_fifo_read_raw function in     hw/display/vmware_vga.c in QEMU allowed local guest OS     administrators to obtain sensitive host memory     information or cause a denial of service (QEMU process     crash) by changing FIFO registers and issuing a VGA     command, which triggers an out-of-bounds read     (bsc#982222)

  - CVE-2016-4453: The vmsvga_fifo_run function in     hw/display/vmware_vga.c in QEMU allowed local guest OS     administrators to cause a denial of service (infinite     loop and QEMU process crash) via a VGA command     (bsc#982223)

  - CVE-2016-5338: The (1) esp_reg_read and (2)     esp_reg_write functions in hw/scsi/esp.c in QEMU allowed     local guest OS administrators to cause a denial of     service (QEMU process crash) or execute arbitrary code     on the QEMU host via vectors related to the information     transfer buffer (bsc#983982)

  - CVE-2016-5337: The megasas_ctrl_get_info function in     hw/scsi/megasas.c in QEMU allowed local guest OS     administrators to obtain sensitive host memory     information via vectors related to reading device     control information (bsc#983961)

  - CVE-2016-5238: The get_cmd function in hw/scsi/esp.c in     QEMU allowed local guest OS administrators to cause a     denial of service (out-of-bounds write and QEMU process     crash) via vectors related to reading from the     information transfer buffer in non-DMA mode (bsc#982959)

  - CVE-2016-5403: The virtqueue_pop function in     hw/virtio/virtio.c in QEMU allowed local guest OS     administrators to cause a denial of service (memory     consumption and QEMU process crash) by submitting     requests without waiting for completion (bsc#991080)

  - CVE-2016-6490: Infinite loop in the virtio framework. A     privileged user inside the guest could have used this     flaw to crash the Qemu instance on the host resulting in     DoS (bsc#991466)

  - CVE-2016-6888: Integer overflow in packet initialisation     in VMXNET3 device driver. A privileged user inside guest     could have used this flaw to crash the Qemu instance     resulting in DoS (bsc#994771)

  - CVE-2016-6833: Use-after-free issue in the VMWARE     VMXNET3 NIC device support. A privileged user inside     guest could have used this issue to crash the Qemu     instance resulting in DoS (bsc#994774)

  - CVE-2016-7116: Host directory sharing via Plan 9 File     System(9pfs) was vulnerable to a directory/path     traversal issue. A privileged user inside guest could     have used this flaw to access undue files on the host     (bsc#996441)

  - CVE-2016-6836: VMWARE VMXNET3 NIC device support was     leaging information leakage. A privileged user inside     guest could have used this to leak host memory bytes to     a guest (bsc#994760)

  - CVE-2016-7155: In the VMWARE PVSCSI paravirtual SCSI bus     a OOB access and/or infinite loop issue could have     allowed a privileged user inside guest to crash the Qemu     process resulting in DoS (bsc#997858)

  - CVE-2016-7156: In the VMWARE PVSCSI paravirtual SCSI bus     a infinite loop issue could have allowed a privileged     user inside guest to crash the Qemu process resulting in     DoS (bsc#997859)

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for xen fixes several issues. These security issues were fixed :

  - CVE-2014-3672: The qemu implementation in libvirt Xen     allowed local guest OS users to cause a denial of     service (host disk consumption) by writing to stdout or     stderr (bsc#981264).

  - CVE-2016-3158: The xrstor function did not properly     handle writes to the hardware FSW.ES bit when running on     AMD64 processors, which allowed local guest OS users to     obtain sensitive register content information from     another guest by leveraging pending exception and mask     bits (bsc#973188).

  - CVE-2016-3159: The fpu_fxrstor function in     arch/x86/i387.c did not properly handle writes to the     hardware FSW.ES bit when running on AMD64 processors,     which allowed local guest OS users to obtain sensitive     register content information from another guest by     leveraging pending exception and mask bits (bsc#973188).

  - CVE-2016-3710: The VGA module improperly performed     bounds checking on banked access to video memory, which     allowed local guest OS administrators to execute     arbitrary code on the host by changing access modes     after setting the bank register, aka the 'Dark Portal'     issue (bsc#978164)

  - CVE-2016-3960: Integer overflow in the x86 shadow     pagetable code allowed local guest OS users to cause a     denial of service (host crash) or possibly gain     privileges by shadowing a superpage mapping     (bsc#974038).

  - CVE-2016-4001: Buffer overflow in the     stellaris_enet_receive function, when the Stellaris     ethernet controller is configured to accept large     packets, allowed remote attackers to cause a denial of     service (QEMU crash) via a large packet (bsc#975130).

  - CVE-2016-4002: Buffer overflow in the mipsnet_receive     function, when the guest NIC is configured to accept     large packets, allowed remote attackers to cause a     denial of service (memory corruption and QEMU crash) or     possibly execute arbitrary code via a packet larger than     1514 bytes (bsc#975138).

  - CVE-2016-4020: The patch_instruction function did not     initialize the imm32 variable, which allowed local guest     OS administrators to obtain sensitive information from     host stack memory by accessing the Task Priority     Register (TPR) (bsc#975907)

  - CVE-2016-4037: The ehci_advance_state function in     hw/usb/hcd-ehci.c allowed local guest OS administrators     to cause a denial of service (infinite loop and CPU     consumption) via a circular split isochronous transfer     descriptor (siTD) list (bsc#976111)

  - CVE-2016-4439: The esp_reg_write function in the 53C9X     Fast SCSI Controller (FSC) support did not properly     check command buffer length, which allowed local guest     OS administrators to cause a denial of service     (out-of-bounds write and QEMU process crash) or     potentially execute arbitrary code on the host via     unspecified vectors (bsc#980716)

  - CVE-2016-4441: The get_cmd function in the 53C9X Fast     SCSI Controller (FSC) support did not properly check DMA     length, which allowed local guest OS administrators to     cause a denial of service (out-of-bounds write and QEMU     process crash) via unspecified vectors, involving an     SCSI command (bsc#980724)

  - CVE-2016-4453: The vmsvga_fifo_run function allowed     local guest OS administrators to cause a denial of     service (infinite loop and QEMU process crash) via a VGA     command (bsc#982225)

  - CVE-2016-4454: The vmsvga_fifo_read_raw function allowed     local guest OS administrators to obtain sensitive host     memory information or cause a denial of service (QEMU     process crash) by changing FIFO registers and issuing a     VGA command, which triggered an out-of-bounds read     (bsc#982224)

  - CVE-2016-4480: The guest_walk_tables function in     arch/x86/mm/guest_walk.c in Xen did not properly handle     the Page Size (PS) page table entry bit at the L4 and L3     page table levels, which might have allowed local guest     OS users to gain privileges via a crafted mapping of     memory (bsc#978295).

  - CVE-2016-4952: Out-of-bounds access issue in     pvsci_ring_init_msg/data routines (bsc#981276)

  - CVE-2016-4962: The libxl device-handling allowed local     OS guest administrators to cause a denial of service     (resource consumption or management facility confusion)     or gain host OS privileges by manipulating information     in guest controlled areas of xenstore (bsc#979620)

  - CVE-2016-4963: The libxl device-handling allowed local     guest OS users with access to the driver domain to cause     a denial of service (management tool confusion) by     manipulating information in the backend directories in     xenstore (bsc#979670)

  - CVE-2016-5105: Stack information leakage while reading     configuration (bsc#982024)

  - CVE-2016-5106: Out-of-bounds write while setting     controller properties (bsc#982025)

  - CVE-2016-5107: Out-of-bounds read in     megasas_lookup_frame() function (bsc#982026)

  - CVE-2016-5126: Heap-based buffer overflow in the     iscsi_aio_ioctl function allowed local guest OS users to     cause a denial of service (QEMU process crash) or     possibly execute arbitrary code via a crafted iSCSI     asynchronous I/O ioctl call (bsc#982286)

  - CVE-2016-5238: The get_cmd function in hw/scsi/esp.c     might have allowed local guest OS administrators to     cause a denial of service (out-of-bounds write and QEMU     process crash) via vectors related to reading from the     information transfer buffer in non-DMA mode (bsc#982960)

  - CVE-2016-5337: The megasas_ctrl_get_info function     allowed local guest OS administrators to obtain     sensitive host memory information via vectors related to     reading device control information (bsc#983973)

  - CVE-2016-5338: The (1) esp_reg_read and (2)     esp_reg_write functions allowed local guest OS     administrators to cause a denial of service (QEMU     process crash) or execute arbitrary code on the host via     vectors related to the information transfer buffer     (bsc#983984)

  - CVE-2016-5403: virtio: unbounded memory allocation on     host via guest leading to DoS (XSA-184) (bsc#990923)

  - CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in     Xen allowed local 32-bit PV guest OS administrators to     gain host OS privileges by leveraging fast-paths for     updating pagetable entries (bsc#988675)

  - CVE-2016-6351: The esp_do_dma function in hw/scsi/esp.c,     when built with ESP/NCR53C9x controller emulation     support, allowed local guest OS administrators to cause     a denial of service (out-of-bounds write and QEMU     process crash) or execute arbitrary code on the host via     vectors involving DMA read into ESP command buffer     (bsc#990843).

  - CVE-2016-6833: A use-after-free issue in the VMWARE     VMXNET3 NIC device support allowed privileged user     inside guest to crash the Qemu instance resulting in DoS     (bsc#994775).

  - CVE-2016-6834: A infinite loop during packet     fragmentation in the VMWARE VMXNET3 NIC device support     allowed privileged user inside guest to crash the Qemu     instance resulting in DoS (bsc#994421).

  - CVE-2016-6835: Buffer overflow in the VMWARE VMXNET3 NIC     device support, causing an OOB read access (bsc#994625).

  - CVE-2016-6836: VMWARE VMXNET3 NIC device allowed     privileged user inside the guest to leak information. It     occured while processing transmit(tx) queue, when it     reaches the end of packet (bsc#994761).

  - CVE-2016-6888: A integer overflow int the VMWARE VMXNET3     NIC device support, during the initialisation of new     packets in the device, could have allowed a privileged     user inside guest to crash the Qemu instance resulting     in DoS (bsc#994772).

  - CVE-2016-7092: The get_page_from_l3e function in     arch/x86/mm.c in Xen allowed local 32-bit PV guest OS     administrators to gain host OS privileges via vectors     related to L3 recursive pagetables (bsc#995785)

  - CVE-2016-7093: Xen allowed local HVM guest OS     administrators to overwrite hypervisor memory and     consequently gain host OS privileges by leveraging     mishandling of instruction pointer truncation during     emulation (bsc#995789)

  - CVE-2016-7094: Buffer overflow in Xen allowed local x86     HVM guest OS administrators on guests running with     shadow paging to cause a denial of service via a     pagetable update (bsc#995792)

  - CVE-2016-7154: Use-after-free vulnerability in the FIFO     event channel code in Xen allowed local guest OS     administrators to cause a denial of service (host crash)     and possibly execute arbitrary code or obtain sensitive     information via an invalid guest frame number     (bsc#997731).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

- CVE-2016-6351: scsi: esp: OOB write access in esp_do_dma     (bz #1360600)

  - CVE-2016-6833: vmxnet3: use-after-free (bz #1368982)

  - CVE-2016-6490: virtio: infinite loop in virtqueue_pop     (bz #1361428)

  - CVE-2016-7156: pvscsi: infinite loop when building SG     list (bz #1373480)

  - CVE-2016-7170: vmware_vga: OOB stack memory access (bz     #1374709)

  - CVE-2016-7161: net: Heap overflow in     xlnx.xps-ethernetlite (bz #1379298)

  - CVE-2016-7466: usb: xhci memory leakage during device     unplug (bz #1377838)

  - CVE-2016-7422: virtio: NULL pointer dereference (bz     #1376756)

  - CVE-2016-7908: net: Infinite loop in mcf_fec_do_tx (bz     #1381193)

  - CVE-2016-8576: usb: xHCI: infinite loop vulnerability     (bz #1382322)

  - CVE-2016-7995: usb: hcd-ehci: memory leak (bz #1382669)

  - Don't depend on edk2 roms where they aren't available     (bz #1373576)

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for xen fixes several issues. These security issues were fixed :

  - CVE-2016-7092: The get_page_from_l3e function in     arch/x86/mm.c in Xen allowed local 32-bit PV guest OS     administrators to gain host OS privileges via vectors     related to L3 recursive pagetables (bsc#995785)

  - CVE-2016-7093: Xen allowed local HVM guest OS     administrators to overwrite hypervisor memory and     consequently gain host OS privileges by leveraging     mishandling of instruction pointer truncation during     emulation (bsc#995789)

  - CVE-2016-7094: Buffer overflow in Xen allowed local x86     HVM guest OS administrators on guests running with     shadow paging to cause a denial of service via a     pagetable update (bsc#995792)

  - CVE-2016-7154: Use-after-free vulnerability in the FIFO     event channel code in Xen allowed local guest OS     administrators to cause a denial of service (host crash)     and possibly execute arbitrary code or obtain sensitive     information via an invalid guest frame number     (bsc#997731)

  - CVE-2016-6836: VMWARE VMXNET3 NIC device allowed     privileged user inside the guest to leak information. It     occured while processing transmit(tx) queue, when it     reaches the end of packet (bsc#994761)

  - CVE-2016-6888: A integer overflow int the VMWARE VMXNET3     NIC device support, during the initialisation of new     packets in the device, could have allowed a privileged     user inside guest to crash the Qemu instance resulting     in DoS (bsc#994772)

  - CVE-2016-6833: A use-after-free issue in the VMWARE     VMXNET3 NIC device support allowed privileged user     inside guest to crash the Qemu instance resulting in DoS     (bsc#994775)

  - CVE-2016-6835: Buffer overflow in the VMWARE VMXNET3 NIC     device support, causing an OOB read access (bsc#994625)

  - CVE-2016-6834: A infinite loop during packet     fragmentation in the VMWARE VMXNET3 NIC device support     allowed privileged user inside guest to crash the Qemu     instance resulting in DoS (bsc#994421)

  - CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in     Xen allowed local 32-bit PV guest OS administrators to     gain host OS privileges by leveraging fast-paths for     updating pagetable entries (bsc#988675)

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for xen fixes the following issues :

These security issues were fixed :

  - CVE-2016-7092: The get_page_from_l3e function in     arch/x86/mm.c in Xen allowed local 32-bit PV guest OS     administrators to gain host OS privileges via vectors     related to L3 recursive pagetables (bsc#995785)

  - CVE-2016-7093: Xen allowed local HVM guest OS     administrators to overwrite hypervisor memory and     consequently gain host OS privileges by leveraging     mishandling of instruction pointer truncation during     emulation (bsc#995789)

  - CVE-2016-7094: Buffer overflow in Xen allowed local x86     HVM guest OS administrators on guests running with     shadow paging to cause a denial of service via a     pagetable update (bsc#995792)

  - CVE-2016-6836: VMWARE VMXNET3 NIC device support was     leaging information leakage. A privileged user inside     guest could have used this to leak host memory bytes to     a guest (boo#994761)

  - CVE-2016-6888: Integer overflow in packet initialisation     in VMXNET3 device driver. A privileged user inside guest     could have used this flaw to crash the Qemu instance     resulting in DoS (bsc#994772)

  - CVE-2016-6833: Use-after-free issue in the VMWARE     VMXNET3 NIC device support. A privileged user inside     guest could have used this issue to crash the Qemu     instance resulting in DoS (boo#994775)

  - CVE-2016-6835: Buffer overflow in the VMWARE VMXNET3 NIC     device support, causing an OOB read access (bsc#994625)

  - CVE-2016-6834: A infinite loop during packet     fragmentation in the VMWARE VMXNET3 NIC device support     allowed privileged user inside guest to crash the Qemu     instance resulting in DoS (bsc#994421)

  - CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in     Xen allowed local 32-bit PV guest OS administrators to     gain host OS privileges by leveraging fast-paths for     updating pagetable entries (bsc#988675)

  - CVE-2016-6259: Xen did not implement Supervisor Mode     Access Prevention (SMAP) whitelisting in 32-bit     exception and event delivery, which allowed local 32-bit     PV guest OS kernels to cause a denial of service     (hypervisor and VM crash) by triggering a safety check     (bsc#988676)

  - CVE-2016-5403: The virtqueue_pop function in     hw/virtio/virtio.c in QEMU allowed local guest OS     administrators to cause a denial of service (memory     consumption and QEMU process crash) by submitting     requests without waiting for completion (boo#990923)

  - CVE-2016-6351: The esp_do_dma function in hw/scsi/esp.c,     when built with ESP/NCR53C9x controller emulation     support, allowed local guest OS administrators to cause     a denial of service (out-of-bounds write and QEMU     process crash) or execute arbitrary code on the host via     vectors involving DMA read into ESP command buffer     (bsc#990843)

  - CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in     Xen allowed local 32-bit PV guest OS administrators to     gain host OS privileges by leveraging fast-paths for     updating pagetable entries (bsc#988675)

  - CVE-2016-6259: Xen did not implement Supervisor Mode     Access Prevention (SMAP) whitelisting in 32-bit     exception and event delivery, which allowed local 32-bit     PV guest OS kernels to cause a denial of service     (hypervisor and VM crash) by triggering a safety check     (bsc#988676)

  - CVE-2016-5337: The megasas_ctrl_get_info function in     hw/scsi/megasas.c in QEMU allowed local guest OS     administrators to obtain sensitive host memory     information via vectors related to reading device     control information (bsc#983973)

  - CVE-2016-5338: The (1) esp_reg_read and (2)     esp_reg_write functions in hw/scsi/esp.c in QEMU allowed     local guest OS administrators to cause a denial of     service (QEMU process crash) or execute arbitrary code     on the QEMU host via vectors related to the information     transfer buffer (bsc#983984)

  - CVE-2016-5238: The get_cmd function in hw/scsi/esp.c in     QEMU allowed local guest OS administrators to cause a     denial of service (out-of-bounds write and QEMU process     crash) via vectors related to reading from the     information transfer buffer in non-DMA mode (bsc#982960)

  - CVE-2016-4453: The vmsvga_fifo_run function in     hw/display/vmware_vga.c in QEMU allowed local guest OS     administrators to cause a denial of service (infinite     loop and QEMU process crash) via a VGA command     (bsc#982225)

  - CVE-2016-4454: The vmsvga_fifo_read_raw function in     hw/display/vmware_vga.c in QEMU allowed local guest OS     administrators to obtain sensitive host memory     information or cause a denial of service (QEMU process     crash) by changing FIFO registers and issuing a VGA     command, which triggers an out-of-bounds read     (bsc#982224)

  - CVE-2016-5126: Heap-based buffer overflow in the     iscsi_aio_ioctl function in block/iscsi.c in QEMU     allowed local guest OS users to cause a denial of     service (QEMU process crash) or possibly execute     arbitrary code via a crafted iSCSI asynchronous I/O     ioctl call (bsc#982286)

  - CVE-2016-5105: The megasas_dcmd_cfg_read function in     hw/scsi/megasas.c in QEMU, when built with MegaRAID SAS     8708EM2 Host Bus Adapter emulation support, used an     uninitialized variable, which allowed local guest     administrators to read host memory via vectors involving     a MegaRAID Firmware Interface (MFI) command (bsc#982024)

  - CVE-2016-5106: The megasas_dcmd_set_properties function     in hw/scsi/megasas.c in QEMU, when built with MegaRAID     SAS 8708EM2 Host Bus Adapter emulation support, allowed     local guest administrators to cause a denial of service     (out-of-bounds write access) via vectors involving a     MegaRAID Firmware Interface (MFI) command (bsc#982025)

  - CVE-2016-5107: The megasas_lookup_frame function in     QEMU, when built with MegaRAID SAS 8708EM2 Host Bus     Adapter emulation support, allowed local guest OS     administrators to cause a denial of service     (out-of-bounds read and crash) via unspecified vectors     (bsc#982026)

  - CVE-2016-4963: The libxl device-handling allowed local     guest OS users with access to the driver domain to cause     a denial of service (management tool confusion) by     manipulating information in the backend directories in     xenstore (bsc#979670)

  - CVE-2016-4962: The libxl device-handling allowed local     OS guest administrators to cause a denial of service     (resource consumption or management facility confusion)     or gain host OS privileges by manipulating information     in guest controlled areas of xenstore (bsc#979620)

  - CVE-2016-4952: Out-of-bounds access issue in     pvsci_ring_init_msg/data routines (bsc#981276)

  - CVE-2016-3710: The VGA module improperly performed     bounds checking on banked access to video memory, which     allowed local guest OS administrators to execute     arbitrary code on the host by changing access modes     after setting the bank register, aka the 'Dark Portal'     issue (bsc#978164)

  - CVE-2014-3672: The qemu implementation in libvirt Xen     allowed local guest OS users to cause a denial of     service (host disk consumption) by writing to stdout or     stderr (bsc#981264)

  - CVE-2016-4441: The get_cmd function in the 53C9X Fast     SCSI Controller (FSC) support did not properly check DMA     length, which allowed local guest OS administrators to     cause a denial of service (out-of-bounds write and QEMU     process crash) via unspecified vectors, involving an     SCSI command (bsc#980724)

  - CVE-2016-4439: The esp_reg_write function in the 53C9X     Fast SCSI Controller (FSC) support did not properly     check command buffer length, which allowed local guest     OS administrators to cause a denial of service     (out-of-bounds write and QEMU process crash) or     potentially execute arbitrary code on the host via     unspecified vectors (bsc#980716)

  - CVE-2016-3960: Integer overflow in the x86 shadow     pagetable code allowed local guest OS users to cause a     denial of service (host crash) or possibly gain     privileges by shadowing a superpage mapping (bsc#974038)

  - CVE-2016-3158: The xrstor function did not properly     handle writes to the hardware FSW.ES bit when running on     AMD64 processors, which allowed local guest OS users to     obtain sensitive register content information from     another guest by leveraging pending exception and mask     bits (bsc#973188)

  - CVE-2016-3159: The fpu_fxrstor function in     arch/x86/i387.c did not properly handle writes to the     hardware FSW.ES bit when running on AMD64 processors,     which allowed local guest OS users to obtain sensitive     register content information from another guest by     leveraging pending exception and mask bits (bsc#973188)

  - CVE-2016-4037: The ehci_advance_state function in     hw/usb/hcd-ehci.c allowed local guest OS administrators     to cause a denial of service (infinite loop and CPU     consumption) via a circular split isochronous transfer     descriptor (siTD) list (bsc#976111)

  - CVE-2016-4020: The patch_instruction function did not     initialize the imm32 variable, which allowed local guest     OS administrators to obtain sensitive information from     host stack memory by accessing the Task Priority     Register (TPR) (bsc#975907)

  - CVE-2016-4001: Buffer overflow in the     stellaris_enet_receive function, when the Stellaris     ethernet controller is configured to accept large     packets, allowed remote attackers to cause a denial of     service (QEMU crash) via a large packet (bsc#975130)

  - CVE-2016-4002: Buffer overflow in the mipsnet_receive     function, when the guest NIC is configured to accept     large packets, allowed remote attackers to cause a     denial of service (memory corruption and QEMU crash) or     possibly execute arbitrary code via a packet larger than     1514 bytes (bsc#975138)

  - CVE-2016-4480: The guest_walk_tables function in     arch/x86/mm/guest_walk.c in Xen did not properly handle     the Page Size (PS) page table entry bit at the L4 and L3     page table levels, which might have allowed local guest     OS users to gain privileges via a crafted mapping of     memory (bsc#978295)

These non-security issues were fixed :

  - boo#991934: xen hypervisor crash in csched_acct

  - boo#992224: During boot of Xen Hypervisor, Failed to get     contiguous memory for DMA from Xen

  - boo#955104: Virsh reports error 'one or more references     were leaked after disconnect from hypervisor' when     'virsh save' failed due to 'no response from client     after 6 keepalive messages'

  - boo#959552: Migration of HVM guest leads into libvirt     segmentation fault

  - boo#993665: Migration of xen guests finishes in: One or     more references were leaked after disconnect from the     hypervisor

  - boo#959330: Guest migrations using virsh results in     error 'Internal error: received hangup / error event on     socket'

  - boo#990500: VM virsh migration fails with keepalive     error: ':virKeepAliveTimerInternal:143 : No response     from client'

  - boo#953518: Unplug also SCSI disks in     qemu-xen-traditional for upstream unplug protocol

  - boo#953518: xen_platform: unplug also SCSI disks in     qemu-xen

  - boo#971949: Support (by ignoring) xl migrate --live. xl     migrations are always live 

  - boo#970135: New virtualization project clock test     randomly fails on Xen

  - boo#990970: Add PMU support for Intel E7-8867 v4 (fam=6,     model=79)

  - boo#985503: vif-route broken

  - boo#961100: Migrate a fv guest from sles12 to sles12sp1     fails remove patch because it can not fix the bug

  - boo#978413: PV guest upgrade from sles11sp4 to sles12sp2     alpha3 failed on sles11sp4 xen host.

  - boo#986586: Out of memory (oom) during boot on 'modprobe     xenblk' (non xen kernel) init.50-hvm-xen_conf

  - boo#900418: Dump cannot be performed on SLES12 XEN

  - boo#953339, boo#953362, boo#953518, boo#984981:
    Implement SUSE specific unplug protocol for emulated PCI     devices in PVonHVM guests to qemu-xen-upstream 

  - boo#954872: script block-dmmd not working as expected -     libxl: error: libxl_dm.c (Additional fixes) block-dmmd

  - boo#982695: xen-4.5.2 qemu fails to boot HVM guest from     xvda 

  - boo#958848: HVM guest crash at /usr/src/packages/BUILD/     xen-4.4.2-testing/obj/default/balloon/balloon.c:407

  - boo#949889: Fail to install 32-bit paravirt VM under     SLES12SP1Beta3 XEN

  - boo#954872: script block-dmmd not working as expected -     libxl: error: libxl_dm.c (another modification)     block-dmmd

  - boo#961600: Poor performance when Xen HVM domU     configured with max memory greater than current memory

  - boo#963161: Windows VM getting stuck during load while a     VF is assigned to it after upgrading to latest     maintenance updates

  - boo#976058: Xen error running simple HVM guest (Post     Alpha 2 xen+qemu)

  - boo#961100: Migrate a fv guest from sles12 to sles12sp1     on xen fails for 'Domain is not running on destination     host'. qemu-ignore-kvm-tpr-opt-on-migration.patch 

  - boo#973631: AWS EC2 kdump issue

  - boo#964427: Discarding device blocks: failed -     Input/output error

This update for xen fixes the following issues :

These security issues were fixed :

  - CVE-2016-7092: The get_page_from_l3e function in     arch/x86/mm.c in Xen allowed local 32-bit PV guest OS     administrators to gain host OS privileges via vectors     related to L3 recursive pagetables (bsc#995785)

  - CVE-2016-7093: Xen allowed local HVM guest OS     administrators to overwrite hypervisor memory and     consequently gain host OS privileges by leveraging     mishandling of instruction pointer truncation during     emulation (bsc#995789)

  - CVE-2016-7094: Buffer overflow in Xen allowed local x86     HVM guest OS administrators on guests running with     shadow paging to cause a denial of service via a     pagetable update (bsc#995792)

  - CVE-2016-7154: Use-after-free vulnerability in the FIFO     event channel code in Xen allowed local guest OS     administrators to cause a denial of service (host crash)     and possibly execute arbitrary code or obtain sensitive     information via an invalid guest frame number     (bsc#997731)

  - CVE-2016-6836: VMWARE VMXNET3 NIC device support was     leaging information leakage. A privileged user inside     guest could have used this to leak host memory bytes to     a guest (boo#994761)

  - CVE-2016-6888: Integer overflow in packet initialisation     in VMXNET3 device driver. A privileged user inside guest     could have used this flaw to crash the Qemu instance     resulting in DoS (bsc#994772)

  - CVE-2016-6833: Use-after-free issue in the VMWARE     VMXNET3 NIC device support. A privileged user inside     guest could have used this issue to crash the Qemu     instance resulting in DoS (boo#994775)

  - CVE-2016-6835: Buffer overflow in the VMWARE VMXNET3 NIC     device support, causing an OOB read access (bsc#994625)

  - CVE-2016-6834: A infinite loop during packet     fragmentation in the VMWARE VMXNET3 NIC device support     allowed privileged user inside guest to crash the Qemu     instance resulting in DoS (bsc#994421)

  - CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in     Xen allowed local 32-bit PV guest OS administrators to     gain host OS privileges by leveraging fast-paths for     updating pagetable entries (bsc#988675)

  - CVE-2016-5403: The virtqueue_pop function in     hw/virtio/virtio.c in QEMU allowed local guest OS     administrators to cause a denial of service (memory     consumption and QEMU process crash) by submitting     requests without waiting for completion (boo#990923)

  - CVE-2016-6351: The esp_do_dma function in hw/scsi/esp.c,     when built with ESP/NCR53C9x controller emulation     support, allowed local guest OS administrators to cause     a denial of service (out-of-bounds write and QEMU     process crash) or execute arbitrary code on the host via     vectors involving DMA read into ESP command buffer     (bsc#990843)

  - CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in     Xen allowed local 32-bit PV guest OS administrators to     gain host OS privileges by leveraging fast-paths for     updating pagetable entries (bsc#988675)

  - CVE-2016-5337: The megasas_ctrl_get_info function in     hw/scsi/megasas.c in QEMU allowed local guest OS     administrators to obtain sensitive host memory     information via vectors related to reading device     control information (bsc#983973)

  - CVE-2016-5338: The (1) esp_reg_read and (2)     esp_reg_write functions in hw/scsi/esp.c in QEMU allowed     local guest OS administrators to cause a denial of     service (QEMU process crash) or execute arbitrary code     on the QEMU host via vectors related to the information     transfer buffer (bsc#983984)

  - CVE-2016-5238: The get_cmd function in hw/scsi/esp.c in     QEMU allowed local guest OS administrators to cause a     denial of service (out-of-bounds write and QEMU process     crash) via vectors related to reading from the     information transfer buffer in non-DMA mode (bsc#982960)

  - CVE-2016-4453: The vmsvga_fifo_run function in     hw/display/vmware_vga.c in QEMU allowed local guest OS     administrators to cause a denial of service (infinite     loop and QEMU process crash) via a VGA command     (bsc#982225)

  - CVE-2016-4454: The vmsvga_fifo_read_raw function in     hw/display/vmware_vga.c in QEMU allowed local guest OS     administrators to obtain sensitive host memory     information or cause a denial of service (QEMU process     crash) by changing FIFO registers and issuing a VGA     command, which triggers an out-of-bounds read     (bsc#982224)

  - CVE-2016-5126: Heap-based buffer overflow in the     iscsi_aio_ioctl function in block/iscsi.c in QEMU     allowed local guest OS users to cause a denial of     service (QEMU process crash) or possibly execute     arbitrary code via a crafted iSCSI asynchronous I/O     ioctl call (bsc#982286)

  - CVE-2016-5105: The megasas_dcmd_cfg_read function in     hw/scsi/megasas.c in QEMU, when built with MegaRAID SAS     8708EM2 Host Bus Adapter emulation support, used an     uninitialized variable, which allowed local guest     administrators to read host memory via vectors involving     a MegaRAID Firmware Interface (MFI) command (bsc#982024)

  - CVE-2016-5106: The megasas_dcmd_set_properties function     in hw/scsi/megasas.c in QEMU, when built with MegaRAID     SAS 8708EM2 Host Bus Adapter emulation support, allowed     local guest administrators to cause a denial of service     (out-of-bounds write access) via vectors involving a     MegaRAID Firmware Interface (MFI) command (bsc#982025)

  - CVE-2016-5107: The megasas_lookup_frame function in     QEMU, when built with MegaRAID SAS 8708EM2 Host Bus     Adapter emulation support, allowed local guest OS     administrators to cause a denial of service     (out-of-bounds read and crash) via unspecified vectors     (bsc#982026)

  - CVE-2016-4963: The libxl device-handling allowed local     guest OS users with access to the driver domain to cause     a denial of service (management tool confusion) by     manipulating information in the backend directories in     xenstore (bsc#979670)

  - CVE-2016-4962: The libxl device-handling allowed local     OS guest administrators to cause a denial of service     (resource consumption or management facility confusion)     or gain host OS privileges by manipulating information     in guest controlled areas of xenstore (bsc#979620)

  - CVE-2016-4952: Out-of-bounds access issue in     pvsci_ring_init_msg/data routines (bsc#981276)

  - CVE-2014-3672: The qemu implementation in libvirt Xen     allowed local guest OS users to cause a denial of     service (host disk consumption) by writing to stdout or     stderr (bsc#981264)

  - CVE-2016-4441: The get_cmd function in the 53C9X Fast     SCSI Controller (FSC) support did not properly check DMA     length, which allowed local guest OS administrators to     cause a denial of service (out-of-bounds write and QEMU     process crash) via unspecified vectors, involving an     SCSI command (bsc#980724)

  - CVE-2016-4439: The esp_reg_write function in the 53C9X     Fast SCSI Controller (FSC) support did not properly     check command buffer length, which allowed local guest     OS administrators to cause a denial of service     (out-of-bounds write and QEMU process crash) or     potentially execute arbitrary code on the host via     unspecified vectors (bsc#980716)

  - CVE-2016-3710: The VGA module improperly performed     bounds checking on banked access to video memory, which     allowed local guest OS administrators to execute     arbitrary code on the host by changing access modes     after setting the bank register, aka the 'Dark Portal'     issue (bsc#978164)

  - CVE-2016-3960: Integer overflow in the x86 shadow     pagetable code allowed local guest OS users to cause a     denial of service (host crash) or possibly gain     privileges by shadowing a superpage mapping (bsc#974038)

  - CVE-2016-4037: The ehci_advance_state function in     hw/usb/hcd-ehci.c allowed local guest OS administrators     to cause a denial of service (infinite loop and CPU     consumption) via a circular split isochronous transfer     descriptor (siTD) list (bsc#976111)

  - CVE-2016-4020: The patch_instruction function did not     initialize the imm32 variable, which allowed local guest     OS administrators to obtain sensitive information from     host stack memory by accessing the Task Priority     Register (TPR) (bsc#975907)

  - CVE-2016-4001: Buffer overflow in the     stellaris_enet_receive function, when the Stellaris     ethernet controller is configured to accept large     packets, allowed remote attackers to cause a denial of     service (QEMU crash) via a large packet (bsc#975130)

  - CVE-2016-4002: Buffer overflow in the mipsnet_receive     function, when the guest NIC is configured to accept     large packets, allowed remote attackers to cause a     denial of service (memory corruption and QEMU crash) or     possibly execute arbitrary code via a packet larger than     1514 bytes (bsc#975138)

  - CVE-2016-3158: The xrstor function did not properly     handle writes to the hardware FSW.ES bit when running on     AMD64 processors, which allowed local guest OS users to     obtain sensitive register content information from     another guest by leveraging pending exception and mask     bits (bsc#973188)

  - CVE-2016-3159: The fpu_fxrstor function in     arch/x86/i387.c did not properly handle writes to the     hardware FSW.ES bit when running on AMD64 processors,     which allowed local guest OS users to obtain sensitive     register content information from another guest by     leveraging pending exception and mask bits (bsc#973188)

  - CVE-2016-4480: The guest_walk_tables function in     arch/x86/mm/guest_walk.c in Xen did not properly handle     the Page Size (PS) page table entry bit at the L4 and L3     page table levels, which might have allowed local guest     OS users to gain privileges via a crafted mapping of     memory (bsc#978295)

These non-security issues were fixed :

  - boo#991934: xen hypervisor crash in csched_acct 

  - boo#992224: [HPS Bug] During boot of Xen Hypervisor,     Failed to get contiguous memory for DMA from Xen 

  - boo#970135: new virtualization project clock test     randomly fails on Xen 

  - boo#971949 xl: Support (by ignoring) xl migrate --live.
    xl migrations are always live 

  - boo#990970: Add PMU support for Intel E7-8867 v4 (fam=6,     model=79) 

  - boo#985503: vif-route broken 

  - boo#978413: PV guest upgrade from sles11sp4 to sles12sp2     alpha3 failed on sles11sp4 xen host

  - boo#986586: out of memory (oom) during boot on 'modprobe     xenblk' (non xen kernel) 

  - boo#953339, boo#953362, boo#953518, boo#984981)     boo#953339, boo#953362, boo#953518, boo#984981:
    Implement SUSE specific unplug protocol for emulated PCI     devices in PVonHVM guests to qemu-xen-upstream 

  - boo#958848: HVM guest crash at /usr/src/packages/BUILD/     xen-4.4.2-testing/obj/default/balloon/balloon.c:407 

  - boo#982695: xen-4.5.2 qemu fails to boot HVM guest from     xvda 

  - boo#954872: script block-dmmd not working as expected 

  - boo#961600: L3: poor performance when Xen HVM domU     configured with max memory greater than current memory 

  - boo#979035: restore xm migrate fixes for boo#955399/     boo#955399 

  - boo#963161: Windows VM getting stuck during load while a     VF is assigned to it after upgrading to latest     maintenance updates boo#963161

  - boo#976058: Xen error running simple HVM guest (Post     Alpha 2 xen+qemu) 

  - boo#973631: AWS EC2 kdump issue 

  - boo#961100: Migrate a fv guest from sles12 to sles12sp1     on xen fails for 'Domain is not running on destination     host'. 

  - boo#964427: Discarding device blocks: failed -     Input/output error

This update for xen fixes several issues. These security issues were fixed :

  - CVE-2016-7092: The get_page_from_l3e function in     arch/x86/mm.c in Xen allowed local 32-bit PV guest OS     administrators to gain host OS privileges via vectors     related to L3 recursive pagetables (bsc#995785).

  - CVE-2016-7093: Xen allowed local HVM guest OS     administrators to overwrite hypervisor memory and     consequently gain host OS privileges by leveraging     mishandling of instruction pointer truncation during     emulation (bsc#995789).

  - CVE-2016-7094: Buffer overflow in Xen allowed local x86     HVM guest OS administrators on guests running with     shadow paging to cause a denial of service via a     pagetable update (bsc#995792).

  - CVE-2016-6836: Information leakage in     vmxnet3_complete_packet (bsc#994761).

  - CVE-2016-6888: Integer overflow in packet initialisation     in VMXNET3 device driver. Aprivileged user inside guest     c... (bsc#994772).

  - CVE-2016-6833: Use after free while writing     (bsc#994775).

  - CVE-2016-6835: Buffer overflow in     vmxnet_tx_pkt_parse_headers() in vmxnet3     deviceemulation. (bsc#994625).

  - CVE-2016-6834: An infinite loop during packet     fragmentation (bsc#994421).

  - CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in     Xen allowed local 32-bit PV guest OS administrators to     gain host OS privileges by leveraging fast-paths for     updating pagetable entries (bsc#988675).

  - CVE-2016-6259: Xen did not implement Supervisor Mode     Access Prevention (SMAP) whitelisting in 32-bit     exception and event delivery, which allowed local 32-bit     PV guest OS kernels to cause a denial of service     (hypervisor and VM crash) by triggering a safety check     (bsc#988676).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote host is affected by the vulnerability described in GLSA-201609-01 (QEMU: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in QEMU. Please review the       CVE identifiers referenced below for details.
  Impact :

    Local users within a guest QEMU environment can execute arbitrary code       within the host or a cause a Denial of Service condition of the QEMU       guest process.
  Workaround :

    There is no known workaround at this time.

ID	Name	Product	Family	Severity
117351	Debian DLA-1497-1 : qemu security update (Spectre)	Nessus	Debian Local Security Checks	critical
94758	SUSE SLES12 Security Update : qemu (SUSE-SU-2016:2781-1)	Nessus	SuSE Local Security Checks	high
94669	Ubuntu 14.04 LTS / 16.04 LTS : QEMU vulnerabilities (USN-3125-1)	Nessus	Ubuntu Local Security Checks	critical
94309	openSUSE Security Update : qemu (openSUSE-2016-1234)	Nessus	SuSE Local Security Checks	high
94277	SUSE SLED12 / SLES12 Security Update : qemu (SUSE-SU-2016:2589-1)	Nessus	SuSE Local Security Checks	high
94269	SUSE SLES12 Security Update : xen (SUSE-SU-2016:2533-1) (Bunker Buster)	Nessus	SuSE Local Security Checks	critical
94122	Fedora 24 : 2:qemu (2016-a56fb613a8)	Nessus	Fedora Local Security Checks	critical
94038	SUSE SLES11 Security Update : xen (SUSE-SU-2016:2507-1) (Bunker Buster)	Nessus	SuSE Local Security Checks	high
94000	openSUSE Security Update : xen (openSUSE-2016-1170) (Bunker Buster)	Nessus	SuSE Local Security Checks	critical
93999	openSUSE Security Update : xen (openSUSE-2016-1169) (Bunker Buster)	Nessus	SuSE Local Security Checks	critical
93935	SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2016:2473-1) (Bunker Buster)	Nessus	SuSE Local Security Checks	high
93697	GLSA-201609-01 : QEMU: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	critical

Detections

Analytics

CVE-2016-6833

medium

Tenable Plugins

critical

high

critical

high

high

critical

critical

high

critical

critical

high

critical