hw/9pfs/cofile.c and hw/9pfs/9p.c in QEMU can modify an fid path while it is being accessed by a second thread, leading to (for example) a use-after-free outcome.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2019-4585 advisory.

    - usb-mtp: use O_NOFOLLOW and O_CLOEXEC. (Gerd Hoffmann)  [Orabug: 29216656]  {CVE-2018-16872}
    - pvrdma: add uar_read routine (Prasad J Pandit)  [Orabug: 29216658]  {CVE-2018-20191}
    - pvrdma: release ring object in case of an error (Prasad J Pandit)  [Orabug: 29216659]  {CVE-2018-20126}
    - pvrdma: check number of pages when creating rings (Prasad J Pandit)  [Orabug: 29216666]     {CVE-2018-20125}
    - pvrdma: check return value from pvrdma_idx_ring_has_ routines (Prasad J Pandit)  [Orabug: 29216672]     {CVE-2018-20216}
    - rdma: remove unused VENDOR_ERR_NO_SGE macro (Prasad J Pandit)  [Orabug: 29216678]  {CVE-2018-20124}
    - rdma: check num_sge does not exceed MAX_SGE (Prasad J Pandit)  [Orabug: 29216678]  {CVE-2018-20124}
    - Document various CVEs as fixed (Mark Kanda)  [Orabug: 29212424]  {CVE-2017-10806} {CVE-2017-11334}     {CVE-2017-12809} {CVE-2017-13672} {CVE-2017-13673} {CVE-2017-13711} {CVE-2017-14167} {CVE-2017-15038}     {CVE-2017-15119} {CVE-2017-15124} {CVE-2017-15268} {CVE-2017-15289} {CVE-2017-16845} {CVE-2017-17381}     {CVE-2017-18030} {CVE-2017-18043} {CVE-2017-2630} {CVE-2017-2633} {CVE-2017-5715} {CVE-2017-5753}     {CVE-2017-5754} {CVE-2017-7471} {CVE-2017-7493} {CVE-2017-8112} {CVE-2017-8309} {CVE-2017-8379}     {CVE-2017-8380} {CVE-2017-9503} {CVE-2018-10839} {CVE-2018-11806} {CVE-2018-12617} {CVE-2018-15746}     {CVE-2018-16847} {CVE-2018-16867} {CVE-2018-17958} {CVE-2018-17962} {CVE-2018-17963} {CVE-2018-18849}     {CVE-2018-19364} {CVE-2018-19489} {CVE-2018-3639} {CVE-2018-5683} {CVE-2018-7550} {CVE-2018-7858}

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

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

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2019-4520 advisory.

    - lsi53c895a: check message length value is valid (Prasad J Pandit)  [Orabug: 28873208]  {CVE-2018-18849}
    - 9p: fix QEMU crash when renaming files (Greg Kurz)  [Orabug: 28971701]  {CVE-2018-19489}
    - 9p: take write lock on fid path updates (CVE-2018-19364) (Greg Kurz)  [Orabug: 28949917]     {CVE-2018-19364}
    - nvme: fix out-of-bounds access to the CMB (Paolo Bonzini)  [Orabug: 28885514]  {CVE-2018-16847}

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

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

According to the versions of the qemu-kvm packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - Memory leak in hw/audio/es1370.c in QEMU (aka Quick     Emulator) allows local guest OS privileged users to     cause a denial of service (host memory consumption and     QEMU process crash) via a large number of device unplug     operations.(CVE-2017-5526)

  - Memory leak in hw/audio/ac97.c in QEMU (aka Quick     Emulator) allows local guest OS privileged users to     cause a denial of service (host memory consumption and     QEMU process crash) via a large number of device unplug     operations.(CVE-2017-5525)

  - The xhci_kick_epctx function in hw/usb/hcd-xhci.c in     QEMU (aka Quick Emulator) allows local guest OS     privileged users to cause a denial of service (infinite     loop and QEMU process crash) via vectors related to     control transfer descriptor sequence.(CVE-2017-5973)

  - The sdhci_sdma_transfer_multi_blocks function in     hw/sd/sdhci.c in QEMU (aka Quick Emulator) allows local     OS guest privileged users to cause a denial of service     (infinite loop and QEMU process crash) via vectors     involving the transfer mode register during multi block     transfer.(CVE-2017-5987)

  - Memory leak in the megasas_handle_dcmd function in     hw/scsi/megasas.c in QEMU (aka Quick Emulator) allows     local guest OS privileged users to cause a denial of     service (host memory consumption) via MegaRAID Firmware     Interface (MFI) commands with the sglist size set to a     value over 2 Gb.(CVE-2017-5856)

  - qemu_deliver_packet_iov in net/net.c in Qemu accepts     packet sizes greater than INT_MAX, which allows     attackers to cause a denial of service or possibly have     unspecified other impact.(CVE-2018-17963)

  - qemu-bridge-helper.c in QEMU 4.0.0 does not ensure that     a network interface name (obtained from bridge.conf or     a --br=bridge option) is limited to the IFNAMSIZ size,     which can lead to an ACL bypass.(CVE-2019-13164)

  - Buffer overflow in the 'megasas_mmio_write' function in     Qemu 2.9.0 allows remote attackers to have unspecified     impact via unknown vectors.(CVE-2017-8380)

  - Quick Emulator (Qemu) built with the VirtFS, host     directory sharing via Plan 9 File System(9pfs) support,     is vulnerable to an improper access control issue. It     could occur while accessing virtfs metadata files in     mapped-file security mode. A guest user could use this     flaw to escalate their privileges inside     guest.(CVE-2017-7493)

  - In QEMU 3.1.0, load_device_tree in device_tree.c calls     the deprecated load_image function, which has a buffer     overflow risk.(CVE-2018-20815)

  - Use-after-free vulnerability in the sofree function in     slirp/socket.c in QEMU (aka Quick Emulator) allows     attackers to cause a denial of service (QEMU instance     crash) by leveraging failure to properly clear ifq_so     from pending packets.(CVE-2017-13711)

  - Stack-based buffer overflow in hw/usb/redirect.c in     QEMU (aka Quick Emulator) allows local guest OS users     to cause a denial of service (QEMU process crash) via     vectors related to logging debug     messages.(CVE-2017-10806)

  - The dhcp_decode function in slirp/bootp.c in QEMU (aka     Quick Emulator) allows local guest OS users to cause a     denial of service (out-of-bounds read and QEMU process     crash) via a crafted DHCP options     string.(CVE-2017-11434)

  - The imx_fec_do_tx function in hw/net/imx_fec.c in QEMU     (aka Quick Emulator) does not properly limit the buffer     descriptor count when transmitting packets, which     allows local guest OS administrators to cause a denial     of service (infinite loop and QEMU process crash) via     vectors involving a buffer descriptor with a length of     0 and crafted values in bd.flags.(CVE-2016-7907)

  - tcp_emu in slirp/tcp_subr.c (aka slirp/src/tcp_subr.c)     in QEMU 3.0.0 uses uninitialized data in an snprintf     call, leading to Information disclosure.(CVE-2019-9824)

  - interface_release_resource in hw/display/qxl.c in QEMU     4.0.0 has a NULL pointer dereference.(CVE-2019-12155)

  - hw/scsi/vmw_pvscsi.c in QEMU (aka Quick Emulator)     allows local guest OS privileged users to cause a     denial of service (infinite loop and CPU consumption)     via the message ring page count.(CVE-2017-8112)

  - Qemu has a Buffer Overflow in rtl8139_do_receive in     hw/net/rtl8139.c because an incorrect integer data type     is used.(CVE-2018-17958)

  - TSX Asynchronous Abort condition on some CPUs utilizing     speculative execution may allow an authenticated user     to potentially enable information disclosure via a side     channel with local access.(CVE-2019-11135)

  - In QEMU 1:4.1-1, 1:2.1+dfsg-12+deb8u6,     1:2.8+dfsg-6+deb9u8, 1:3.1+dfsg-8~deb10u1,     1:3.1+dfsg-8+deb10u2, and 1:2.1+dfsg-12+deb8u12     (fixed), when executing script in lsi_execute_script(),     the LSI scsi adapter emulator advances 's->dsp' index     to read next opcode. This can lead to an infinite loop     if the next opcode is empty. Move the existing loop     exit after 10k iterations so that it covers no-op     opcodes as well.(CVE-2019-12068)

  - qemu-seccomp.c in QEMU might allow local OS guest users     to cause a denial of service (guest crash) by     leveraging mishandling of the seccomp policy for     threads other than the main thread.(CVE-2018-15746)

  - Qemu has a Buffer Overflow in pcnet_receive in     hw/net/pcnet.c because an incorrect integer data type     is used.(CVE-2018-17962)

  - Quick Emulator(Qemu) built with the VMWARE PVSCSI     paravirtual SCSI bus emulation support is vulnerable to     an OOB r/w access issue. It could occur while     processing SCSI commands 'PVSCSI_CMD_SETUP_RINGS' or     'PVSCSI_CMD_SETUP_MSG_RING'. A privileged user inside     guest could use this flaw to crash the Qemu process     resulting in DoS.(CVE-2016-4952)

  - m_cat in slirp/mbuf.c in Qemu has a heap-based buffer     overflow via incoming fragmented     datagrams.(CVE-2018-11806)

  - In Qemu 3.0.0, lsi_do_msgin in hw/scsi/lsi53c895a.c     allows out-of-bounds access by triggering an invalid     msg_len value.(CVE-2018-18849)

  - hw/9pfs/cofile.c and hw/9pfs/9p.c in QEMU can modify an     fid path while it is being accessed by a second thread,     leading to (for example) a use-after-free     outcome.(CVE-2018-19364)

  - v9fs_wstat in hw/9pfs/9p.c in QEMU allows guest OS     users to cause a denial of service (crash) because of a     race condition during file renaming.(CVE-2018-19489)

  - QEMU, through version 2.10 and through version 3.1.0,     is vulnerable to an out-of-bounds read of up to 128     bytes in the hw/i2c/i2c-ddc.c:i2c_ddc() function. A     local attacker with permission to execute i2c commands     could exploit this to read stack memory of the qemu     process on the host.(CVE-2019-3812)

  - A flaw was found in QEMU's Media Transfer Protocol     (MTP). The code opening files in usb_mtp_get_object and     usb_mtp_get_partial_object and directories in     usb_mtp_object_readdir doesn't consider that the     underlying filesystem may have changed since the time     lstat(2) was called in usb_mtp_object_alloc, a     classical TOCTTOU problem. An attacker with write     access to the host filesystem, shared with a guest, can     use this property to navigate the host filesystem in     the context of the QEMU process and read any file the     QEMU process has access to. Access to the filesystem     may be local or via a network share protocol such as     CIFS.(CVE-2018-16872)

  - ** DISPUTED ** An issue was discovered in ide_dma_cb()     in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest     system can crash the QEMU process in the host system     via a special SCSI_IOCTL_SEND_COMMAND. It hits an     assertion that implies that the size of successful DMA     transfers there must be a multiple of 512 (the size of     a sector). NOTE: a member of the QEMU security team     disputes the significance of this issue because a     'privileged guest user has many ways to cause similar     DoS effect, without triggering this     assert.'(CVE-2019-20175)

  - Quick Emulator (QEMU) built with Network Block Device     (NBD) Server support was vulnerable to a null-pointer     dereference issue. The flaw could occur when releasing     a client that was not initialized due to failed     negotiation. A remote user or process could exploit     this flaw to crash the qemu-nbd server (denial of     service).(CVE-2017-9524)

  - Qemu has integer overflows because IOReadHandler and     its associated functions use a signed integer data type     for a size value.(CVE-2018-18438)

  - The Bluetooth subsystem in QEMU mishandles negative     values for length variables, leading to memory     corruption.(CVE-2018-19665)

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

According to the versions of the qemu-kvm packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - qemu-kvm is an open source virtualizer that provides     hardware emulation for the KVM hypervisor. qemu-kvm     acts as a virtual machine monitor together with the KVM     kernel modules, and emulates the hardware for a full     system such as a PC and its associated     peripherals.Security Fix(es):In libslirp 4.1.0, as used     in QEMU 4.2.0, tcp_subr.c misuses snprintf return     values, leading to a buffer overflow in later     code.(CVE-2020-8608)Integer overflow in the VNC display     driver in QEMU before 2.1.0 allows attachers to cause a     denial of service (process crash) via a CLIENT_CUT_TEXT     message, which triggers an infinite     loop.(CVE-2015-5239)The ne2000_receive function in     hwete2000.c in QEMU before 2.4.0.1 allows attackers to     cause a denial of service (infinite loop and instance     crash) or possibly execute arbitrary code via vectors     related to receiving packets.(CVE-2015-5278)Buffer     overflow in the send_control_msg function in     hw/char/virtio-serial-bus.c in QEMU before 2.4.0 allows     guest users to cause a denial of service (QEMU process     crash) via a crafted virtio control     message.(CVE-2015-5745)tcp_emu in tcp_subr.c in     libslirp 4.1.0, as used in QEMU 4.2.0, mismanages     memory, as demonstrated by IRC DCC commands in EMU_IRC.
    This can cause a heap-based buffer overflow or other     out-of-bounds access which can lead to a DoS or     potential execute arbitrary code.(CVE-2020-7039)Qemu     before version 2.9 is vulnerable to an improper link     following when built with the VirtFS. A privileged user     inside guest could use this flaw to access host file     system beyond the shared folder and potentially     escalating their privileges on a     host.(CVE-2016-9602)The ohci_service_ed_list function     in hw/usb/hcd-ohci.c in QEMU (aka Quick Emulator)     before 2.9.0 allows local guest OS users to cause a     denial of service (infinite loop) via vectors involving     the number of link endpoint list descriptors, a     different vulnerability than     CVE-2017-9330.(CVE-2017-6505)qmp_guest_file_read in     qga/commands-posix.c and qga/commands-win32.c in     qemu-ga (aka QEMU Guest Agent) in QEMU 2.12.50 has an     integer overflow causing a g_malloc0() call to trigger     a segmentation fault when trying to allocate a large     memory chunk. The vulnerability can be exploited by     sending a crafted QMP command (including     guest-file-read with a large count value) to the agent     via the listening socket.(CVE-2018-12617)Memory leak in     hw/audio/ac97.c in QEMU (aka Quick Emulator) allows     local guest OS privileged users to cause a denial of     service (host memory consumption and QEMU process     crash) via a large number of device unplug     operations.(CVE-2017-5525)Memory leak in     hw/audio/es1370.c in QEMU (aka Quick Emulator) allows     local guest OS privileged users to cause a denial of     service (host memory consumption and QEMU process     crash) via a large number of device unplug     operations.(CVE-2017-5526)QEMU (aka Quick Emulator)     before 2.9.0, when built with the USB OHCI Emulation     support, allows local guest OS users to cause a denial     of service (infinite loop) by leveraging an incorrect     return value, a different vulnerability than     CVE-2017-6505.(CVE-2017-9330)v9fs_wstat in hw/9pfs/9p.c     in QEMU allows guest OS users to cause a denial of     service (crash) because of a race condition during file     renaming.(CVE-2018-19489)hw/9pfs/cofile.c and     hw/9pfs/9p.c in QEMU can modify an fid path while it is     being accessed by a second thread, leading to (for     example) a use-after-free outcome.(CVE-2018-19364)

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

According to the versions of the qemu-kvm packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - In QEMU 3.0.0, tcp_emu in slirp/tcp_subr.c has a     heap-based buffer overflow.(CVE-2019-6778)

  - A flaw was found in QEMU's Media Transfer Protocol     (MTP). The code opening files in usb_mtp_get_object and     usb_mtp_get_partial_object and directories in     usb_mtp_object_readdir doesn't consider that the     underlying filesystem may have changed since the time     lstat(2) was called in usb_mtp_object_alloc, a     classical TOCTTOU problem. An attacker with write     access to the host filesystem, shared with a guest, can     use this property to navigate the host filesystem in     the context of the QEMU process and read any file the     QEMU process has access to. Access to the filesystem     may be local or via a network share protocol such as     CIFS.(CVE-2018-16872)

  - hw/9pfs/cofile.c and hw/9pfs/9p.c in QEMU can modify an     fid path while it is being accessed by a second thread,     leading to (for example) a use-after-free     outcome.(CVE-2018-19364)

  - v9fs_wstat in hw/9pfs/9p.c in QEMU allows guest OS     users to cause a denial of service (crash) because of a     race condition during file renaming.(CVE-2018-19489)

  - QEMU, through version 2.10 and through version 3.1.0,     is vulnerable to an out-of-bounds read of up to 128     bytes in the hw/i2c/i2c-ddc.c:i2c_ddc() function. A     local attacker with permission to execute i2c commands     could exploit this to read stack memory of the qemu     process on the host.(CVE-2019-3812)

  - Memory leak in hw/audio/ac97.c in QEMU (aka Quick     Emulator) allows local guest OS privileged users to     cause a denial of service (host memory consumption and     QEMU process crash) via a large number of device unplug     operations.(CVE-2017-5525)

  - Memory leak in hw/audio/es1370.c in QEMU (aka Quick     Emulator) allows local guest OS privileged users to     cause a denial of service (host memory consumption and     QEMU process crash) via a large number of device unplug     operations.(CVE-2017-5526)

  - The sdhci_sdma_transfer_multi_blocks function in     hw/sd/sdhci.c in QEMU (aka Quick Emulator) allows local     OS guest privileged users to cause a denial of service     (infinite loop and QEMU process crash) via vectors     involving the transfer mode register during multi block     transfer.(CVE-2017-5987)

  - An integer overflow flaw was found in Quick Emulator     (QEMU) in the CCID Card device support. The flaw could     occur while passing messages via command/response     packets to and from the host. A privileged user inside     a guest could use this flaw to crash the QEMU     process.(CVE-2017-5898)

  - The xhci_kick_epctx function in hw/usb/hcd-xhci.c in     QEMU (aka Quick Emulator) allows local guest OS     privileged users to cause a denial of service (infinite     loop and QEMU process crash) via vectors related to     control transfer descriptor sequence.(CVE-2017-5973)

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

According to the versions of the qemu-kvm packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - In QEMU 3.0.0, tcp_emu in slirp/tcp_subr.c has a     heap-based buffer overflow.(CVE-2019-6778)

  - A flaw was found in QEMU's Media Transfer Protocol     (MTP). The code opening files in usb_mtp_get_object and     usb_mtp_get_partial_object and directories in     usb_mtp_object_readdir doesn't consider that the     underlying filesystem may have changed since the time     lstat(2) was called in usb_mtp_object_alloc, a     classical TOCTTOU problem. An attacker with write     access to the host filesystem, shared with a guest, can     use this property to navigate the host filesystem in     the context of the QEMU process and read any file the     QEMU process has access to. Access to the filesystem     may be local or via a network share protocol such as     CIFS.(CVE-2018-16872)

  - hw/9pfs/cofile.c and hw/9pfs/9p.c in QEMU can modify an     fid path while it is being accessed by a second thread,     leading to (for example) a use-after-free     outcome.(CVE-2018-19364)

  - v9fs_wstat in hw/9pfs/9p.c in QEMU allows guest OS     users to cause a denial of service (crash) because of a     race condition during file renaming.(CVE-2018-19489)

  - QEMU, through version 2.10 and through version 3.1.0,     is vulnerable to an out-of-bounds read of up to 128     bytes in the hw/i2c/i2c-ddc.c:i2c_ddc() function. A     local attacker with permission to execute i2c commands     could exploit this to read stack memory of the qemu     process on the host.(CVE-2019-3812)

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

According to the versions of the qemu-kvm packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - A flaw was found in QEMU's Media Transfer Protocol     (MTP) where a path traversal in the in     usb_mtp_write_data function in hw/usb/dev-mtp.c due to     an improper file name sanitization. Reading and writing     of arbitrary files is allowed when a guest device is     mounted which may lead to a denial of service scenario     or possibly lead to code execution on the     host.(CVE-2018-16867)

  - A flaw was found in QEMU's Media Transfer Protocol     (MTP). The code opening files in usb_mtp_get_object and     usb_mtp_get_partial_object and directories in     usb_mtp_object_readdir doesn't consider that the     underlying filesystem may have changed since the time     lstat(2) was called in usb_mtp_object_alloc, a     classical TOCTTOU problem. An attacker with write     access to the host filesystem, shared with a guest, can     use this property to navigate the host filesystem in     the context of the QEMU process and read any file the     QEMU process has access to. Access to the filesystem     may be local or via a network share protocol such as     CIFS.(CVE-2018-16872)

  - hw/9pfs/cofile.c and hw/9pfs/9p.c in QEMU can modify an     fid path while it is being accessed by a second thread,     leading to (for example) a use-after-free     outcome.(CVE-2018-19364)

  - v9fs_wstat in hw/9pfs/9p.c in QEMU allows guest OS     users to cause a denial of service (crash) because of a     race condition during file renaming.(CVE-2018-19489)

  - hw/rdma/vmw/pvrdma_main.c in QEMU does not implement a     read operation (such as uar_read by analogy to     uar_write), which allows attackers to cause a denial of     service (NULL pointer dereference).(CVE-2018-20191)

  - QEMU, through version 2.10 and through version 3.1.0,     is vulnerable to an out-of-bounds read of up to 128     bytes in the hw/i2c/i2c-ddc.c:i2c_ddc() function. A     local attacker with permission to execute i2c commands     could exploit this to read stack memory of the qemu     process on the host.(CVE-2019-3812)

  - In QEMU 3.0.0, tcp_emu in slirp/tcp_subr.c has a     heap-based buffer overflow.(CVE-2019-6778)

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

Multiple security issues were discovered in QEMU, a fast processor emulator, which could result in denial of service, the execution of arbitrary code or information disclosure.

In addition this update backports support to passthrough the new md-clear CPU flag added in the intel-microcode update shipped in DSA 4447 to x86-based guests.

This update for qemu fixes the following issues :

Security vulnerabilities addressed :

  - CVE-2019-6778: Fixed an out-of-bounds access in slirp     (bsc#1123156)

  - CVE-2018-16872: Fixed a host security vulnerability     related to handling symlinks in usb-mtp (bsc#1119493)

  - CVE-2018-19489: Fixed a Denial-of-Service in virtfs     (bsc#1117275)

  - CVE-2018-19364: Fixed an use-after-free vulnerability if     virtfs interface is deliberately abused (bsc#1116717)

  - CVE-2018-18954: Fixed an out-of-bounds access performing     PowerNV memory operations (bsc#1114957)

  - CVE-2017-13673: Fixed a reachable assert failure during     during display update (bsc#1056386)

  - CVE-2017-13672: Fixed an out-of-bounds read access     during display update (bsc#1056334)

  - CVE-2018-7858: Fixed an out-of-bounds access in cirrus     when updating vga display allowing for Denial-of-Service     (bsc#1084604)

Other bug fixes and changes :

  - Fix pwrite64/pread64/write to return 0 over -1 for a     zero length NULL buffer in qemu (bsc#1121600)

  - Fix bad guest time after migration (bsc#1113231)

This update was imported from the SUSE:SLE-12-SP3:Update update project.

- CVE-2018-19364: 9pfs: use-after-free (bz #1651359)

  - CVE-2018-19489: 9pfs: use-after-free renaming files (bz     #1653157)

  - CVE-2018-16867: usb-mtp: path traversal issue (bz     #1656746)

  - CVE-2018-16872: usb-mtp: path traversal issue (bz     #1659150)

  - CVE-2018-20191: pvrdma: uar_read leads to NULL deref (bz     #1660315)

  - CVE-2019-6778: slirp: heap buffer overflow (bz #1669072)

  - CVE-2019-3812: Out-of-bounds read in hw/i2c/i2c-ddc.c     allows for memory disclosure (bz #1678081)

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 qemu fixes the following issues :

Security vulnerabilities addressed :

CVE-2019-6778: Fixed an out-of-bounds access in slirp (bsc#1123156)

CVE-2018-16872: Fixed a host security vulnerability related to handling symlinks in usb-mtp (bsc#1119493)

CVE-2018-19489: Fixed a Denial-of-Service in virtfs (bsc#1117275)

CVE-2018-19364: Fixed an use-after-free vulnerability if virtfs interface is deliberately abused (bsc#1116717)

CVE-2018-18954: Fixed an out-of-bounds access performing PowerNV memory operations (bsc#1114957)

CVE-2017-13673: Fixed a reachable assert failure during during display update (bsc#1056386)

CVE-2017-13672: Fixed an out-of-bounds read access during display update (bsc#1056334)

CVE-2018-7858: Fixed an out-of-bounds access in cirrus when updating vga display allowing for Denial-of-Service (bsc#1084604)

Other bug fixes and changes: Fix pwrite64/pread64/write to return 0 over -1 for a zero length NULL buffer in qemu (bsc#1121600)

Fix bad guest time after migration (bsc#1113231)

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 qemu fixes the following issues :

Security issues fixed :

  - CVE-2019-6778: Fixed a heap buffer overflow issue in the     SLiRP networking implementation (bsc#1123156).

  - CVE-2018-16872: Fixed a host security vulnerability     related to handling symlinks in usb-mtp (bsc#1119493).

  - CVE-2018-19489: Fixed a denial of service vulnerability     in virtfs (bsc#1117275).

  - CVE-2018-19364: Fixed a use-after-free if the virtfs     interface resulting in a denial of service     (bsc#1116717).

  - CVE-2018-18954: Fixed a denial of service vulnerability     related to PowerPC PowerNV memory operations     (bsc#1114957).

Non-security issues fixed :

  - Improved disk performance for qemu on xen (bsc#1100408).

  - Fixed xen offline migration (bsc#1079730, bsc#1101982,     bsc#1063993).

  - Fixed pwrite64/pread64/write to return 0 over -1 for a     zero length NULL buffer in qemu (bsc#1121600).

  - Use /bin/bash to echo value into sys fs for ksm control     (bsc#1112646).

  - Return specification exception for unimplemented diag     308 subcodes rather than a hardware error (bsc#1123179).

This update was imported from the SUSE:SLE-15:Update update project.

This update for qemu fixes the following issues :

Security issues fixed :

CVE-2019-6778: Fixed a heap buffer overflow issue in the SLiRP networking implementation (bsc#1123156).

CVE-2018-16872: Fixed a host security vulnerability related to handling symlinks in usb-mtp (bsc#1119493).

CVE-2018-19489: Fixed a denial of service vulnerability in virtfs (bsc#1117275).

CVE-2018-19364: Fixed a use-after-free if the virtfs interface resulting in a denial of service (bsc#1116717).

CVE-2018-7858: Fixed a denial of service which could occur while updating the VGA display, after guest has adjusted the display dimensions (bsc#1084604).

CVE-2017-13673: Fixed a denial of service in the cpu_physical_memory_snapshot_get_dirty function.

CVE-2017-13672: Fixed a denial of service via vectors involving display update.

Non-security issues fixed: Fixed bad guest time after migration (bsc#1113231).

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 qemu fixes the following issues :

Security issue fixed :

CVE-2019-6778: Fixed a heap buffer overflow issue in the SLiRP networking implementation (bsc#1123156).

CVE-2018-16872: Fixed a host security vulnerability related to handling symlinks in usb-mtp (bsc#1119493).

CVE-2018-19489: Fixed a denial of service vulnerability in virtfs (bsc#1117275).

CVE-2018-19364: Fixed a use-after-free if the virtfs interface resulting in a denial of service (bsc#1116717).

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 qemu fixes the following issues :

Security issues fixed :

CVE-2019-6778: Fixed a heap buffer overflow issue in the SLiRP networking implementation (bsc#1123156).

CVE-2018-19489: Fixed a denial of service vulnerability in virtfs (bsc#1117275).

CVE-2018-19364: Fixed a use-after-free if the virtfs interface resulting in a denial of service (bsc#1116717).

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 qemu fixes the following issues :

Security issues fixed :

CVE-2019-6778: Fixed a heap buffer overflow issue in the SLiRP networking implementation (bsc#1123156).

CVE-2018-16872: Fixed a host security vulnerability related to handling symlinks in usb-mtp (bsc#1119493).

CVE-2018-19489: Fixed a denial of service vulnerability in virtfs (bsc#1117275).

CVE-2018-19364: Fixed a use-after-free if the virtfs interface resulting in a denial of service (bsc#1116717).

CVE-2018-18954: Fixed a denial of service vulnerability related to PowerPC PowerNV memory operations (bsc#1114957).

Non-security issues fixed: Improved disk performance for qemu on xen (bsc#1100408).

Fixed xen offline migration (bsc#1079730, bsc#1101982, bsc#1063993).

Fixed pwrite64/pread64/write to return 0 over -1 for a zero length NULL buffer in qemu (bsc#1121600).

Use /bin/bash to echo value into sys fs for ksm control (bsc#1112646).

Return specification exception for unimplemented diag 308 subcodes rather than a hardware error (bsc#1123179).

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 kvm fixes the following issues :

Security issues fixed :

CVE-2019-6778: Fixed a heap buffer overflow issue in the SLiRP networking implementation (bsc#1123156).

CVE-2018-19489: Fixed a denial of service vulnerability in virtfs (bsc#1117275).

CVE-2018-19364: Fixed a use-after-free if the virtfs interface resulting in a denial of service (bsc#1116717).

Non-security issue fixed: Fixed LAPIC TSC deadline timer save/restore (bsc#1109544)

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.

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

CVE-2018-17958

The rtl8139 emulator is affected by an integer overflow and subsequent buffer overflow. This vulnerability might be triggered by remote attackers with crafted packets to perform denial of service (via OOB stack buffer access).

CVE-2018-19364

The 9pfs subsystem is affected by a race condition allowing threads to modify an fid path while it is being accessed by another thread, leading to (for example) a use-after-free outcome. This vulnerability might be triggered by local attackers to perform denial of service.

CVE-2018-19489

The 9pfs subsystem is affected by a race condition during file renaming. This vulnerability might be triggered by local attackers to perform denial of service.

For Debian 8 'Jessie', these problems have been fixed in version 1:2.1+dfsg-12+deb8u9.

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.

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3826-1 advisory.

    Daniel Shapira and Arash Tohidi discovered that QEMU incorrectly handled NE2000 device emulation. An     attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service.
    (CVE-2018-10839)

    It was discovered that QEMU incorrectly handled the Slirp networking back-end. 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 18.04 LTS. (CVE-2018-11806)

    Fakhri Zulkifli discovered that the QEMU guest agent incorrectly handled certain QMP commands. An attacker     could possibly use this issue to crash the QEMU guest agent, resulting in a denial of service.
    (CVE-2018-12617)

    Li Qiang discovered that QEMU incorrectly handled NVM Express Controller emulation. An 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 18.04 LTS and Ubuntu 18.10.
    (CVE-2018-16847)

    Daniel Shapira and Arash Tohidi discovered that QEMU incorrectly handled RTL8139 device emulation. An     attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service.
    (CVE-2018-17958)

    Daniel Shapira and Arash Tohidi discovered that QEMU incorrectly handled PCNET device emulation. An     attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service.
    (CVE-2018-17962)

    Daniel Shapira discovered that QEMU incorrectly handled large packet sizes. An attacker inside the guest     could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2018-17963)

    It was discovered that QEMU incorrectly handled LSI53C895A device emulation. An attacker inside the guest     could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2018-18849)

    Moguofang discovered that QEMU incorrectly handled the IPowerNV LPC controller. An attacker inside the     guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only     affected Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-18954)

    Zhibin Hu discovered that QEMU incorrectly handled the Plan 9 File System support. An attacker inside the     guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2018-19364)

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.

ID	Name	Product	Family	Severity
180740	Oracle Linux 7 : qemu (ELSA-2019-4585)	Nessus	Oracle Linux Local Security Checks	critical
180717	Oracle Linux 7 : qemu (ELSA-2019-4520)	Nessus	Oracle Linux Local Security Checks	high
138009	EulerOS Virtualization 3.0.6.0 : qemu-kvm (EulerOS-SA-2020-1790)	Nessus	Huawei Local Security Checks	critical
137489	EulerOS 2.0 SP2 : qemu-kvm (EulerOS-SA-2020-1647)	Nessus	Huawei Local Security Checks	high
134555	EulerOS Virtualization for ARM 64 3.0.2.0 : qemu-kvm (EulerOS-SA-2020-1266)	Nessus	Huawei Local Security Checks	high
131517	EulerOS Virtualization for ARM 64 3.0.3.0 : qemu-kvm (EulerOS-SA-2019-2352)	Nessus	Huawei Local Security Checks	high
128184	EulerOS 2.0 SP8 : qemu-kvm (EulerOS-SA-2019-1815)	Nessus	Huawei Local Security Checks	high
125609	Debian DSA-4454-1 : qemu - security update	Nessus	Debian Local Security Checks	high
123493	openSUSE Security Update : qemu (openSUSE-2019-1074)	Nessus	SuSE Local Security Checks	high
123101	Fedora 29 : 2:qemu (2019-88a98ce795)	Nessus	Fedora Local Security Checks	high
122776	SUSE SLED12 / SLES12 Security Update : qemu (SUSE-SU-2019:0582-1)	Nessus	SuSE Local Security Checks	high
122495	openSUSE Security Update : qemu (openSUSE-2019-254)	Nessus	SuSE Local Security Checks	high
122471	SUSE SLES12 Security Update : qemu (SUSE-SU-2019:0489-1)	Nessus	SuSE Local Security Checks	high
122419	SUSE SLES12 Security Update : qemu (SUSE-SU-2019:0471-1)	Nessus	SuSE Local Security Checks	high
122397	SUSE SLES12 Security Update : qemu (SUSE-SU-2019:0457-1)	Nessus	SuSE Local Security Checks	high
122341	SUSE SLED12 / SLES12 Security Update : qemu (SUSE-SU-2019:0435-1)	Nessus	SuSE Local Security Checks	high
122313	SUSE SLES11 Security Update : kvm (SUSE-SU-2019:13962-1)	Nessus	SuSE Local Security Checks	high
122309	SUSE SLED15 / SLES15 Security Update : qemu (SUSE-SU-2019:0423-1)	Nessus	SuSE Local Security Checks	high
121436	Debian DLA-1646-1 : qemu security update	Nessus	Debian Local Security Checks	high
119216	Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : QEMU vulnerabilities (USN-3826-1)	Nessus	Ubuntu Local Security Checks	critical

Detections

Analytics

CVE-2018-19364

medium

Tenable Plugins

critical

high

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critical