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.

The remote Redhat Enterprise Linux 7 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - QEMU: net: ignore packets with large size (CVE-2018-17963)

  - 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)

  - The MSI-X MMIO support in hw/pci/msix.c in QEMU (aka Quick Emulator) allows local guest OS privileged     users to cause a denial of service (NULL pointer dereference and QEMU process crash) by leveraging failure     to define the .write method. (CVE-2015-7549)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

The remote Redhat Enterprise Linux 6 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - QEMU: net: ignore packets with large size (CVE-2018-17963)

  - 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)

  - The ehci_process_itd function in hw/usb/hcd-ehci.c in QEMU allows local guest OS administrators to cause a     denial of service (infinite loop and CPU consumption) via a circular isochronous transfer descriptor (iTD)     list. (CVE-2015-8558)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

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 installation on the remote host is affected by the following vulnerabilities :

  - 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)

  - This vulnerability has been modified since it was last     analyzed by the NVD. It is awaiting reanalysis which     may result in further changes to the information     provided.(CVE-2019-11135)

  - 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)

  - ip_reass in ip_input.c in libslirp 4.0.0 has a     heap-based buffer overflow via a large packet because     it mishandles a case involving the first     fragment.(CVE-2019-14378)

  - 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)

  - 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)

  - The ne2000_receive function in hw/net/ne2000.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)

  - The process_tx_desc function in hw/net/e1000.c in QEMU     before 2.4.0.1 does not properly process transmit     descriptor data when sending a network packet, which     allows attackers to cause a denial of service (infinite     loop and guest crash) via unspecified     vectors.(CVE-2015-6815)

  - Heap-based buffer overflow in the ne2000_receive     function in hw/net/ne2000.c in QEMU before 2.4.0.1     allows guest OS users to cause a denial of service     (instance crash) or possibly execute arbitrary code via     vectors related to receiving packets.(CVE-2015-5279)

  - Heap-based buffer overflow in the .receive callback of     xlnx.xps-ethernetlite in QEMU (aka Quick Emulator)     allows attackers to execute arbitrary code on the QEMU     host via a large ethlite packet.(CVE-2016-7161)

  - hw/net/vmxnet3.c in QEMU 2.0.0-rc0, 1.7.1, and earlier     allows local guest users to cause a denial of service     or possibly execute arbitrary code via vectors related     to (1) RX or (2) TX queue numbers or (3) interrupt     indices. NOTE: some of these details are obtained from     third party information.(CVE-2013-4544)

  - The slirp_smb function in net/slirp.c in QEMU 2.3.0 and     earlier creates temporary files with predictable names,     which allows local users to cause a denial of service     (instantiation failure) by creating /tmp/qemu-smb.*-*     files before the program.(CVE-2015-4037)

  - hw/ide/core.c in QEMU does not properly restrict the     commands accepted by an ATAPI device, which allows     guest users to cause a denial of service or possibly     have unspecified other impact via certain IDE commands,     as demonstrated by a WIN_READ_NATIVE_MAX command to an     empty drive, which triggers a divide-by-zero error and     instance crash.(CVE-2015-6855)

  - hw/virtio/virtio.c in the Virtual Network Device     (virtio-net) support in QEMU, when big or mergeable     receive buffers are not supported, allows remote     attackers to cause a denial of service (guest network     consumption) via a flood of jumbo frames on the (1)     tuntap or (2) macvtap interface.(CVE-2015-7295)

  - The MSI-X MMIO support in hw/pci/msix.c in QEMU (aka     Quick Emulator) allows local guest OS privileged users     to cause a denial of service (NULL pointer dereference     and QEMU process crash) by leveraging failure to define     the .write method.(CVE-2015-7549)

  - The eepro100 emulator in QEMU qemu-kvm blank allows     local guest users to cause a denial of service     (application crash and infinite loop) via vectors     involving the command block list.(CVE-2015-8345)

  - Qemu, when built with VNC display driver support,     allows remote attackers to cause a denial of service     (arithmetic exception and application crash) via     crafted SetPixelFormat messages from a     client.(CVE-2015-8504)

  - The ehci_process_itd function in hw/usb/hcd-ehci.c in     QEMU allows local guest OS administrators to cause a     denial of service (infinite loop and CPU consumption)     via a circular isochronous transfer descriptor (iTD)     list.(CVE-2015-8558)

  - Memory leak in net/vmxnet3.c in QEMU allows remote     attackers to cause a denial of service (memory     consumption).(CVE-2015-8567)

  - Memory leak in QEMU, when built with a VMWARE VMXNET3     paravirtual NIC emulator support, allows local guest     users to cause a denial of service (host memory     consumption) by trying to activate the vmxnet3 device     repeatedly.(CVE-2015-8568)

  - Stack-based buffer overflow in the     megasas_ctrl_get_info function in QEMU, when built with     SCSI MegaRAID SAS HBA emulation support, allows local     guest users to cause a denial of service (QEMU instance     crash) via a crafted SCSI controller CTRL_GET_INFO     command.(CVE-2015-8613)

  - Use-after-free vulnerability in hw/ide/ahci.c in QEMU,     when built with IDE AHCI Emulation support, allows     guest OS users to cause a denial of service (instance     crash) or possibly execute arbitrary code via an     invalid AHCI Native Command Queuing (NCQ) AIO     command.(CVE-2016-1568)

  - QEMU (aka Quick Emulator) built with the USB EHCI     emulation support is vulnerable to a null pointer     dereference flaw. It could occur when an application     attempts to write to EHCI capabilities registers. A     privileged user inside quest could use this flaw to     crash the QEMU process instance resulting in     DoS.(CVE-2016-2198)

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

  - The is_rndis function in the USB Net device emulator     (hw/usb/dev-network.c) in QEMU before 2.5.1 does not     properly validate USB configuration descriptor objects,     which allows 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.(CVE-2016-2392)

  - Multiple integer overflows in the USB Net device     emulator (hw/usb/dev-network.c) in QEMU before 2.5.1     allow local guest OS administrators to cause a denial     of service (QEMU process crash) or obtain sensitive     host memory information via a remote NDIS control     message packet that is mishandled in the (1)     rndis_query_response, (2) rndis_set_response, or (3)     usb_net_handle_dataout function.(CVE-2016-2538)

  - The ne2000_receive function in the NE2000 NIC emulation     support (hw/net/ne2000.c) in QEMU before 2.5.1 allows     local guest OS administrators to cause a denial of     service (infinite loop and QEMU process crash) via     crafted values for the PSTART and PSTOP registers,     involving ring buffer control.(CVE-2016-2841)

  - QEMU, when built with the Pseudo Random Number     Generator (PRNG) back-end support, allows local guest     OS users to cause a denial of service (process crash)     via an entropy request, which triggers arbitrary stack     based allocation and memory corruption.(CVE-2016-2858)

  - Buffer overflow in the stellaris_enet_receive function     in hw/net/stellaris_enet.c in QEMU, when the Stellaris     ethernet controller is configured to accept large     packets, allows remote attackers to cause a denial of     service (QEMU crash) via a large packet.(CVE-2016-4001)

  - Buffer overflow in the mipsnet_receive function in     hw/net/mipsnet.c in QEMU, when the guest NIC is     configured to accept large packets, allows 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.(CVE-2016-4002)

  - The ehci_advance_state function in hw/usb/hcd-ehci.c in     QEMU allows local guest OS administrators to cause a     denial of service (infinite loop and CPU consumption)     via a circular split isochronous transfer descriptor     (siTD) list, a related issue to     CVE-2015-8558.(CVE-2016-4037)

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

  - The vmsvga_fifo_read_raw function in     hw/display/vmware_vga.c in QEMU allows 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.(CVE-2016-4454)

  - The net_tx_pkt_do_sw_fragmentation function in     hw/net/net_tx_pkt.c in QEMU (aka Quick Emulator) allows     local guest OS administrators to cause a denial of     service (infinite loop and QEMU process crash) via a     zero length for the current fragment     length.(CVE-2016-6834)

  - The vmxnet_tx_pkt_parse_headers function in     hw/net/vmxnet_tx_pkt.c in QEMU (aka Quick Emulator)     allows local guest OS administrators to cause a denial     of service (buffer over-read) by leveraging failure to     check IP header length.(CVE-2016-6835)

  - The vmxnet3_complete_packet function in     hw/net/vmxnet3.c in QEMU (aka Quick Emulator) allows     local guest OS administrators to obtain sensitive host     memory information by leveraging failure to initialize     the txcq_descr object.(CVE-2016-6836)

  - Integer overflow in the net_tx_pkt_init function in     hw/net/net_tx_pkt.c in QEMU (aka Quick Emulator) allows     local guest OS administrators to cause a denial of     service (QEMU process crash) via the maximum     fragmentation count, which triggers an unchecked     multiplication and NULL pointer     dereference.(CVE-2016-6888)

  - Directory traversal vulnerability in hw/9pfs/9p.c in     QEMU (aka Quick Emulator) allows local guest OS     administrators to access host files outside the export     path via a .. (dot dot) in an unspecified     string.(CVE-2016-7116)

  - The pvscsi_ring_pop_req_descr function in     hw/scsi/vmw_pvscsi.c in QEMU (aka Quick Emulator)     allows local guest OS administrators to cause a denial     of service (infinite loop and QEMU process crash) by     leveraging failure to limit process IO loop to the ring     size.(CVE-2016-7421)

  - The mcf_fec_do_tx function in hw/net/mcf_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-2016-7908)

  - The pcnet_rdra_addr function in hw/net/pcnet.c in QEMU     (aka Quick Emulator) allows local guest OS     administrators to cause a denial of service (infinite     loop and QEMU process crash) by setting the (1) receive     or (2) transmit descriptor ring length to     0.(CVE-2016-7909)

  - The xhci_ring_fetch function in hw/usb/hcd-xhci.c in     QEMU (aka Quick Emulator) allows local guest OS     administrators to cause a denial of service (infinite     loop and QEMU process crash) by leveraging failure to     limit the number of link Transfer Request Blocks (TRB)     to process.(CVE-2016-8576)

  - The serial_update_parameters function in     hw/char/serial.c in QEMU (aka Quick Emulator) allows     local guest OS administrators to cause a denial of     service (divide-by-zero error and QEMU process crash)     via vectors involving a value of divider greater than     baud base.(CVE-2016-8669)

  - The intel_hda_xfer function in hw/audio/intel-hda.c in     QEMU (aka Quick Emulator) allows local guest OS     administrators to cause a denial of service (infinite     loop and CPU consumption) via an entry with the same     value for buffer length and pointer     position.(CVE-2016-8909)

  - The rtl8139_cplus_transmit function in hw/net/rtl8139.c     in QEMU (aka Quick Emulator) allows local guest OS     administrators to cause a denial of service (infinite     loop and CPU consumption) by leveraging failure to     limit the ring descriptor count.(CVE-2016-8910)

  - Memory leak in the v9fs_xattrcreate function in     hw/9pfs/9p.c in QEMU (aka Quick Emulator) allows local     guest OS administrators to cause a denial of service     (memory consumption and QEMU process crash) via a large     number of Txattrcreate messages with the same fid     number.(CVE-2016-9102)

  - The v9fs_xattrcreate function in hw/9pfs/9p.c in QEMU     (aka Quick Emulator) allows local guest OS     administrators to obtain sensitive host heap memory     information by reading xattribute values before writing     to them.(CVE-2016-9103)

  - Multiple integer overflows in the (1) v9fs_xattr_read     and (2) v9fs_xattr_write functions in hw/9pfs/9p.c in     QEMU (aka Quick Emulator) allow local guest OS     administrators to cause a denial of service (QEMU     process crash) via a crafted offset, which triggers an     out-of-bounds access.(CVE-2016-9104)

  - Memory leak in the v9fs_link function in hw/9pfs/9p.c     in QEMU (aka Quick Emulator) allows local guest OS     administrators to cause a denial of service (memory     consumption) via vectors involving a reference to the     source fid object.(CVE-2016-9105)

  - Memory leak in the v9fs_write function in hw/9pfs/9p.c     in QEMU (aka Quick Emulator) allows local guest OS     administrators to cause a denial of service (memory     consumption) by leveraging failure to free an IO     vector.(CVE-2016-9106)

  - Race condition in QEMU in Xen allows local x86 HVM     guest OS administrators to gain privileges by changing     certain data on shared rings, aka a 'double fetch'     vulnerability.(CVE-2016-9381)

  - Quick Emulator (Qemu) built with the USB redirector     usb-guest support is vulnerable to a memory leakage     flaw. It could occur while destroying the USB     redirector in 'usbredir_handle_destroy'. A guest     user/process could use this issue to leak host memory,     resulting in DoS for a host.(CVE-2016-9907)

  - Quick Emulator (Qemu) built with the USB EHCI Emulation     support is vulnerable to a memory leakage issue. It     could occur while processing packet data in     'ehci_init_transfer'. A guest user/process could use     this issue to leak host memory, resulting in DoS for a     host.(CVE-2016-9911)

  - 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)

  - Integer overflow in the macro ROUND_UP (n, d) in Quick     Emulator (Qemu) allows a user to cause a denial of     service (Qemu process crash).(CVE-2017-18043)

  - Memory leak in the serial_exit_core function in     hw/char/serial.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-2017-5579)

  - 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)

  - Memory leak in the audio/audio.c in QEMU (aka Quick     Emulator) allows remote attackers to cause a denial of     service (memory consumption) by repeatedly starting and     stopping audio capture.(CVE-2017-8309)

  - Memory leak in QEMU (aka Quick Emulator), when built     with IDE AHCI Emulation support, allows local guest OS     privileged users to cause a denial of service (memory     consumption) by repeatedly hot-unplugging the AHCI     device.(CVE-2017-9373)

  - Memory leak in QEMU (aka Quick Emulator), when built     with USB EHCI Emulation support, allows local guest OS     privileged users to cause a denial of service (memory     consumption) by repeatedly hot-unplugging the     device.(CVE-2017-9374)

  - Qemu emulator <= 3.0.0 built with the NE2000 NIC     emulation support is vulnerable to an integer overflow,     which could lead to buffer overflow issue. It could     occur when receiving packets over the network. A user     inside guest could use this flaw to crash the Qemu     process resulting in DoS.(CVE-2018-10839)

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

  - 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)

  - 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.

kvm was updated to fix 33 security issues.

These security issues were fixed :

  - CVE-2016-4439: Avoid OOB access in 53C9X emulation     (bsc#980711)

  - CVE-2016-4441: Avoid OOB access in 53C9X emulation     (bsc#980723)

  - CVE-2016-3710: Fixed VGA emulation based OOB access with     potential for guest escape (bsc#978158)

  - CVE-2016-3712: Fixed VGa emulation based DOS and OOB     read access exploit (bsc#978160)

  - CVE-2016-4037: Fixed USB ehci based DOS (bsc#976109)

  - CVE-2016-2538: Fixed potential OOB access in USB net     device emulation (bsc#967969)

  - CVE-2016-2841: Fixed OOB access / hang in ne2000     emulation (bsc#969350)

  - CVE-2016-2858: Avoid potential DOS when using QEMU     pseudo random number generator (bsc#970036)

  - CVE-2016-2857: Fixed OOB access when processing IP     checksums (bsc#970037)

  - CVE-2016-4001: Fixed OOB access in Stellaris enet     emulated nic (bsc#975128)

  - CVE-2016-4002: Fixed OOB access in MIPSnet emulated     controller (bsc#975136)

  - CVE-2016-4020: Fixed possible host data leakage to guest     from TPR access (bsc#975700)

  - CVE-2015-3214: Fixed OOB read in i8254 PIC (bsc#934069)

  - CVE-2014-9718: Fixed the handling of malformed or short     ide PRDTs to avoid any opportunity for guest to cause     DoS by abusing that interface (bsc#928393)

  - CVE-2014-3689: Fixed insufficient parameter validation     in rectangle functions (bsc#901508)

  - CVE-2014-3615: The VGA emulator in QEMU allowed local     guest users to read host memory by setting the display     to a high resolution (bsc#895528).

  - CVE-2015-5239: Integer overflow in vnc_client_read() and     protocol_client_msg() (bsc#944463).

  - CVE-2015-5278: Infinite loop in ne2000_receive()     function (bsc#945989).

  - CVE-2015-5279: Heap-based buffer overflow in the     ne2000_receive function in hw/net/ne2000.c in QEMU     allowed guest OS users to cause a denial of service     (instance crash) or possibly execute arbitrary code via     vectors related to receiving packets (bsc#945987).

  - CVE-2015-5745: Buffer overflow in virtio-serial     (bsc#940929).

  - CVE-2015-6855: hw/ide/core.c in QEMU did not properly     restrict the commands accepted by an ATAPI device, which     allowed guest users to cause a denial of service or     possibly have unspecified other impact via certain IDE     commands, as demonstrated by a WIN_READ_NATIVE_MAX     command to an empty drive, which triggers a     divide-by-zero error and instance crash (bsc#945404).

  - CVE-2015-7295: hw/virtio/virtio.c in the Virtual Network     Device (virtio-net) support in QEMU, when big or     mergeable receive buffers are not supported, allowed     remote attackers to cause a denial of service (guest     network consumption) via a flood of jumbo frames on the     (1) tuntap or (2) macvtap interface (bsc#947159).

  - CVE-2015-7549: PCI NULL pointer dereferences     (bsc#958917).

  - CVE-2015-8504: VNC floating point exception     (bsc#958491).

  - CVE-2015-8558: Infinite loop in ehci_advance_state     resulting in DoS (bsc#959005).

  - CVE-2015-8613: Wrong sized memset in megasas command     handler (bsc#961358).

  - CVE-2015-8619: Potential DoS for long HMP sendkey     command argument (bsc#960334).

  - CVE-2015-8743: OOB memory access in ne2000 ioport r/w     functions (bsc#960725).

  - CVE-2016-1568: AHCI use-after-free in aio port commands     (bsc#961332).

  - CVE-2016-1714: Potential OOB memory access in processing     firmware configuration (bsc#961691).

  - CVE-2016-1922: NULL pointer dereference when processing     hmp i/o command (bsc#962320).

  - CVE-2016-1981: Potential DoS (infinite loop) in e1000     device emulation by malicious privileged user within     guest (bsc#963782).

  - CVE-2016-2198: Malicious privileged guest user were able     to cause DoS by writing to read-only EHCI capabilities     registers (bsc#964413).

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.

qemu was updated to fix 29 security issues.

These security issues were fixed :

  - CVE-2016-4439: Avoid OOB access in 53C9X emulation     (bsc#980711)

  - CVE-2016-4441: Avoid OOB access in 53C9X emulation     (bsc#980723)

  - CVE-2016-4952: Avoid OOB access in Vmware PV SCSI     emulation (bsc#981266)

  - CVE-2015-8817: Avoid OOB access in PCI dma I/O     (bsc#969121)

  - CVE-2015-8818: Avoid OOB access in PCI dma I/O     (bsc#969122)

  - CVE-2016-3710: Fixed VGA emulation based OOB access with     potential for guest escape (bsc#978158)

  - CVE-2016-3712: Fixed VGa emulation based DOS and OOB     read access exploit (bsc#978160)

  - CVE-2016-4037: Fixed USB ehci based DOS (bsc#976109)

  - CVE-2016-2538: Fixed potential OOB access in USB net     device emulation (bsc#967969)

  - CVE-2016-2841: Fixed OOB access / hang in ne2000     emulation (bsc#969350)

  - CVE-2016-2858: Avoid potential DOS when using QEMU     pseudo random number generator (bsc#970036)

  - CVE-2016-2857: Fixed OOB access when processing IP     checksums (bsc#970037)

  - CVE-2016-4001: Fixed OOB access in Stellaris enet     emulated nic (bsc#975128)

  - CVE-2016-4002: Fixed OOB access in MIPSnet emulated     controller (bsc#975136)

  - CVE-2016-4020: Fixed possible host data leakage to guest     from TPR access (bsc#975700)

  - CVE-2016-2197: Prevent AHCI NULL pointer dereference     when using FIS CLB engine (bsc#964411)

  - CVE-2015-5745: Buffer overflow in virtio-serial     (bsc#940929).

  - CVE-2015-7549: PCI NULL pointer dereferences     (bsc#958917).

  - CVE-2015-8504: VNC floating point exception     (bsc#958491).

  - CVE-2015-8558: Infinite loop in ehci_advance_state     resulting in DoS (bsc#959005).

  - CVE-2015-8567: A guest repeatedly activating a vmxnet3     device can leak host memory (bsc#959386).

  - CVE-2015-8568: A guest repeatedly activating a vmxnet3     device can leak host memory (bsc#959386).

  - CVE-2015-8613: Wrong sized memset in megasas command     handler (bsc#961358).

  - CVE-2015-8619: Potential DoS for long HMP sendkey     command argument (bsc#960334).

  - CVE-2015-8743: OOB memory access in ne2000 ioport r/w     functions (bsc#960725).

  - CVE-2015-8744: Incorrect l2 header validation could have     lead to a crash via assert(2) call (bsc#960835).

  - CVE-2015-8745: Reading IMR registers could have lead to     a crash via assert(2) call (bsc#960708).

  - CVE-2016-1568: AHCI use-after-free in aio port commands     (bsc#961332).

  - CVE-2016-1714: Potential OOB memory access in processing     firmware configuration (bsc#961691).

  - CVE-2016-1922: NULL pointer dereference when processing     hmp i/o command (bsc#962320).

  - CVE-2016-1981: Potential DoS (infinite loop) in e1000     device emulation by malicious privileged user within     guest (bsc#963782).

  - CVE-2016-2198: Malicious privileged guest user were able     to cause DoS by writing to read-only EHCI capabilities     registers (bsc#964413).

This non-security issue was fixed

  - bsc#886378: qemu truncates vhd images in virt-rescue

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.

qemu was updated to fix 29 security issues.

These security issues were fixed :

  - CVE-2016-4439: Avoid OOB access in 53C9X emulation     (bsc#980711)

  - CVE-2016-4441: Avoid OOB access in 53C9X emulation     (bsc#980723)

  - CVE-2016-4952: Avoid OOB access in Vmware PV SCSI     emulation (bsc#981266)

  - CVE-2015-8817: Avoid OOB access in PCI dma I/O     (bsc#969121)

  - CVE-2015-8818: Avoid OOB access in PCI dma I/O     (bsc#969122)

  - CVE-2016-3710: Fixed VGA emulation based OOB access with     potential for guest escape (bsc#978158)

  - CVE-2016-3712: Fixed VGa emulation based DOS and OOB     read access exploit (bsc#978160)

  - CVE-2016-4037: Fixed USB ehci based DOS (bsc#976109)

  - CVE-2016-2538: Fixed potential OOB access in USB net     device emulation (bsc#967969)

  - CVE-2016-2841: Fixed OOB access / hang in ne2000     emulation (bsc#969350)

  - CVE-2016-2858: Avoid potential DOS when using QEMU     pseudo random number generator (bsc#970036)

  - CVE-2016-2857: Fixed OOB access when processing IP     checksums (bsc#970037)

  - CVE-2016-4001: Fixed OOB access in Stellaris enet     emulated nic (bsc#975128)

  - CVE-2016-4002: Fixed OOB access in MIPSnet emulated     controller (bsc#975136)

  - CVE-2016-4020: Fixed possible host data leakage to guest     from TPR access (bsc#975700)

  - CVE-2016-2197: Prevent AHCI NULL pointer dereference     when using FIS CLB engine (bsc#964411)

  - CVE-2015-5745: Buffer overflow in virtio-serial     (bsc#940929).

  - CVE-2015-7549: PCI NULL pointer dereferences     (bsc#958917).

  - CVE-2015-8504: VNC floating point exception     (bsc#958491).

  - CVE-2015-8558: Infinite loop in ehci_advance_state     resulting in DoS (bsc#959005).

  - CVE-2015-8567: A guest repeatedly activating a vmxnet3     device can leak host memory (bsc#959386).

  - CVE-2015-8568: A guest repeatedly activating a vmxnet3     device can leak host memory (bsc#959386).

  - CVE-2015-8613: Wrong sized memset in megasas command     handler (bsc#961358).

  - CVE-2015-8619: Potential DoS for long HMP sendkey     command argument (bsc#960334).

  - CVE-2015-8743: OOB memory access in ne2000 ioport r/w     functions (bsc#960725).

  - CVE-2015-8744: Incorrect l2 header validation could have     lead to a crash via assert(2) call (bsc#960835).

  - CVE-2015-8745: Reading IMR registers could have lead to     a crash via assert(2) call (bsc#960708).

  - CVE-2016-1568: AHCI use-after-free in aio port commands     (bsc#961332).

  - CVE-2016-1714: Potential OOB memory access in processing     firmware configuration (bsc#961691).

  - CVE-2016-1922: NULL pointer dereference when processing     hmp i/o command (bsc#962320).

  - CVE-2016-1981: Potential DoS (infinite loop) in e1000     device emulation by malicious privileged user within     guest (bsc#963782).

  - CVE-2016-2198: Malicious privileged guest user were able     to cause DoS by writing to read-only EHCI capabilities     registers (bsc#964413).

This non-security issue was fixed

  - bsc#886378: qemu truncates vhd images in virt-rescue

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

qemu was updated to fix 37 security issues.

These security issues were fixed :

  - CVE-2016-4439: Avoid OOB access in 53C9X emulation     (bsc#980711)

  - CVE-2016-4441: Avoid OOB access in 53C9X emulation     (bsc#980723)

  - CVE-2016-4952: Avoid OOB access in Vmware PV SCSI     emulation (bsc#981266)

  - CVE-2015-8817: Avoid OOB access in PCI DMA I/O     (bsc#969121)

  - CVE-2015-8818: Avoid OOB access in PCI DMA I/O     (bsc#969122)

  - CVE-2016-3710: Fixed VGA emulation based OOB access with     potential for guest escape (bsc#978158)

  - CVE-2016-3712: Fixed VGa emulation based DOS and OOB     read access exploit (bsc#978160)

  - CVE-2016-4037: Fixed USB ehci based DOS (bsc#976109)

  - CVE-2016-2538: Fixed potential OOB access in USB net     device emulation (bsc#967969)

  - CVE-2016-2841: Fixed OOB access / hang in ne2000     emulation (bsc#969350)

  - CVE-2016-2858: Avoid potential DOS when using QEMU     pseudo random number generator (bsc#970036)

  - CVE-2016-2857: Fixed OOB access when processing IP     checksums (bsc#970037)

  - CVE-2016-4001: Fixed OOB access in Stellaris enet     emulated nic (bsc#975128)

  - CVE-2016-4002: Fixed OOB access in MIPSnet emulated     controller (bsc#975136)

  - CVE-2016-4020: Fixed possible host data leakage to guest     from TPR access (bsc#975700)

  - CVE-2015-3214: Fixed OOB read in i8254 PIC (bsc#934069)

  - CVE-2014-9718: Fixed the handling of malformed or short     ide PRDTs to avoid any opportunity for guest to cause     DoS by abusing that interface (bsc#928393)

  - CVE-2014-3689: Fixed insufficient parameter validation     in rectangle functions (bsc#901508)

  - CVE-2014-3615: The VGA emulator in QEMU allowed local     guest users to read host memory by setting the display     to a high resolution (bsc#895528).

  - CVE-2015-5239: Integer overflow in vnc_client_read() and     protocol_client_msg() (bsc#944463).

  - CVE-2015-5745: Buffer overflow in virtio-serial     (bsc#940929).

  - CVE-2015-7295: hw/virtio/virtio.c in the Virtual Network     Device (virtio-net) support in QEMU, when big or     mergeable receive buffers are not supported, allowed     remote attackers to cause a denial of service (guest     network consumption) via a flood of jumbo frames on the     (1) tuntap or (2) macvtap interface (bsc#947159).

  - CVE-2015-7549: PCI NULL pointer dereferences     (bsc#958917).

  - CVE-2015-8504: VNC floating point exception     (bsc#958491).

  - CVE-2015-8558: Infinite loop in ehci_advance_state     resulting in DoS (bsc#959005).

  - CVE-2015-8567: A guest repeatedly activating a vmxnet3     device can leak host memory (bsc#959386).

  - CVE-2015-8568: A guest repeatedly activating a vmxnet3     device can leak host memory (bsc#959386).

  - CVE-2015-8613: Wrong sized memset in megasas command     handler (bsc#961358).

  - CVE-2015-8619: Potential DoS for long HMP sendkey     command argument (bsc#960334).

  - CVE-2015-8743: OOB memory access in ne2000 ioport r/w     functions (bsc#960725).

  - CVE-2015-8744: Incorrect l2 header validation could have     lead to a crash via assert(2) call (bsc#960835).

  - CVE-2015-8745: Reading IMR registers could have lead to     a crash via assert(2) call (bsc#960708).

  - CVE-2016-1568: AHCI use-after-free in aio port commands     (bsc#961332).

  - CVE-2016-1714: Potential OOB memory access in processing     firmware configuration (bsc#961691).

  - CVE-2016-1922: NULL pointer dereference when processing     hmp i/o command (bsc#962320).

  - CVE-2016-1981: Potential DoS (infinite loop) in e1000     device emulation by malicious privileged user within     guest (bsc#963782).

  - CVE-2016-2198: Malicious privileged guest user were able     to cause DoS by writing to read-only EHCI capabilities     registers (bsc#964413).

This non-security issue was fixed

  - bsc#886378: qemu truncates vhd images in virt-rescue

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.

ui/vnc: limit client_cut_text msg payload size [CVE-2015-5239] (#1259504), e1000: Avoid infinite loop in processing transmit descriptor [CVE-2015-6815] (#1260224), net: add checks to validate ring buffer pointers [CVE-2015-5279] (#1263278), net: avoid infinite loop when receiving packets [CVE-2015-5278] (#1263281), qemu buffer overflow in virtio-serial [CVE-2015-5745] (#1251354)

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora 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-201602-01 (QEMU: Multiple vulnerabilities)

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

    A remote attacker might cause a Denial of Service or gain escalated       privileges from a guest VM.
  Workaround :

    There is no known workaround at this time.

Prasad J Pandit, Red Hat Product Security Team, reports :

Qemu emulator built with the virtio-serial vmchannel support is vulnerable to a buffer overflow issue. It could occur while exchanging virtio control messages between guest and the host.

A malicious guest could use this flaw to corrupt few bytes of Qemu memory area, potentially crashing the Qemu process.

Several vulnerabilities were discovered in qemu-kvm, a full virtualization solution on x86 hardware.

  - CVE-2015-5165     Donghai Zhu discovered that the QEMU model of the     RTL8139 network card did not sufficiently validate     inputs in the C+ mode offload emulation, allowing a     malicious guest to read uninitialized memory from the     QEMU process's heap.

  - CVE-2015-5745     A buffer overflow vulnerability was discovered in the     way QEMU handles the virtio-serial device. A malicious     guest could use this flaw to mount a denial of service     (QEMU process crash).

Several vulnerabilities were discovered in qemu, a fast processor emulator.

  - CVE-2015-3214     Matt Tait of Google's Project Zero security team     discovered a flaw in the QEMU i8254 PIT emulation. A     privileged guest user in a guest with QEMU PIT emulation     enabled could potentially use this flaw to execute     arbitrary code on the host with the privileges of the     hosting QEMU process.

  - CVE-2015-5154     Kevin Wolf of Red Hat discovered a heap buffer overflow     flaw in the IDE subsystem in QEMU while processing     certain ATAPI commands. A privileged guest user in a     guest with the CDROM drive enabled could potentially use     this flaw to execute arbitrary code on the host with the     privileges of the hosting QEMU process.

  - CVE-2015-5165     Donghai Zhu discovered that the QEMU model of the     RTL8139 network card did not sufficiently validate     inputs in the C+ mode offload emulation, allowing a     malicious guest to read uninitialized memory from the     QEMU process's heap.

  - CVE-2015-5225     Mr Qinghao Tang from QIHU 360 Inc. and Mr Zuozhi from     Alibaba Inc discovered a buffer overflow flaw in the VNC     display driver leading to heap memory corruption. A     privileged guest user could use this flaw to mount a     denial of service (QEMU process crash), or potentially     to execute arbitrary code on the host with the     privileges of the hosting QEMU process.

  - CVE-2015-5745     A buffer overflow vulnerability was discovered in the     way QEMU handles the virtio-serial device. A malicious     guest could use this flaw to mount a denial of service     (QEMU process crash).

- Fix crash in qemu_spice_create_display (bz #1163047) *     CVE-2015-3209: pcnet: multi-tmd buffer overflow in the     tx path (bz #1230536) * CVE-2015-3214: i8254:
    out-of-bounds memory access (bz #1243728) *     CVE-2015-5154: ide: atapi: heap overflow during I/O     buffer memory access (bz #1247141) * CVE-2015-5745:
    buffer overflow in virtio-serial (bz #1251160) *     CVE-2015-5165: rtl8139 uninitialized heap memory     information leakage to guest (bz #1249755)

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora 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 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-2724-1 advisory.

    It was discovered that QEMU incorrectly handled a PRDT with zero complete sectors in the IDE     functionality. A malicious guest could possibly use this issue to cause a denial of service. This issue     only affected Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-9718)

    Donghai Zhu discovered that QEMU incorrectly handled the RTL8139 driver. A malicious guest could possibly     use this issue to read sensitive information from arbitrary host memory. (CVE-2015-5165)

    Donghai Zhu discovered that QEMU incorrectly handled unplugging emulated block devices. A malicious guest     could use this issue to cause a denial of service, or possibly execute arbitrary code on the host as the     user running the QEMU process. In the default installation, when QEMU is used with libvirt, attackers     would be isolated by the libvirt AppArmor profile. This issue only affected Ubuntu 15.04. (CVE-2015-5166)

    Qinghao Tang and Mr. Zuozhi discovered that QEMU incorrectly handled memory in the VNC display driver. A     malicious guest could use this issue to cause a denial of service, or possibly execute arbitrary code on     the host as the user running the QEMU process. In the default installation, when QEMU is used with     libvirt, attackers would be isolated by the libvirt AppArmor profile. This issue only affected Ubuntu     15.04. (CVE-2015-5225)

    It was discovered that QEMU incorrectly handled the virtio-serial device. A malicious guest could use this     issue to cause a denial of service, or possibly execute arbitrary code on the host as the user running the     QEMU process. 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 and Ubuntu 15.04. (CVE-2015-5745)

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.

- Rebased to version 2.4.0 * Support for virtio-gpu, 2D     only * Support for virtio-based keyboard/mouse/tablet     emulation * x86 support for memory hot-unplug

  - ACPI v5.1 table support for 'virt' board *     CVE-2015-3209: pcnet: multi-tmd buffer overflow in the     tx path (bz #1230536) * CVE-2015-3214: i8254: out-of-     bounds memory access (bz #1243728) * CVE-2015-5158: scsi     stack-based buffer overflow (bz #1246025) *     CVE-2015-5154: ide: atapi: heap overflow during I/O     buffer memory access (bz #1247141) * CVE-2015-5165:
    rtl8139 uninitialized heap memory information leakage to     guest (bz #1249755) * CVE-2015-5166: BlockBackend object     use after free issue (bz #1249758) * CVE-2015-5745:
    buffer overflow in virtio- serial (bz #1251160)

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

- Rebased to version 2.3.1

    - Fix crash in qemu_spice_create_display (bz #1163047)

    - Fix qemu-img map crash for unaligned image (bz       #1229394)

    - CVE-2015-3209: pcnet: multi-tmd buffer overflow in the       tx path (bz #1230536)

    - CVE-2015-3214: i8254: out-of-bounds memory access (bz       #1243728)

    - CVE-2015-5158: scsi stack-based buffer overflow (bz       #1246025)

    - CVE-2015-5154: ide: atapi: heap overflow during I/O       buffer memory access (bz #1247141)

    - CVE-2015-5166: BlockBackend object use after free       issue (bz #1249758)

    - CVE-2015-5745: buffer overflow in virtio-serial (bz       #1251160)

    - CVE-2015-5165: rtl8139 uninitialized heap memory       information leakage to guest (bz #1249755)

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

ID	Name	Product	Family	Severity
198727	RHEL 7 : qemu-kvm (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	critical
198718	RHEL 6 : qemu-kvm (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	critical
137489	EulerOS 2.0 SP2 : qemu-kvm (EulerOS-SA-2020-1647)	Nessus	Huawei Local Security Checks	high
135559	EulerOS 2.0 SP3 : qemu-kvm (EulerOS-SA-2020-1430)	Nessus	Huawei Local Security Checks	critical
93180	SUSE SLES11 Security Update : kvm (SUSE-SU-2016:1785-1)	Nessus	SuSE Local Security Checks	critical
93170	SUSE SLED12 / SLES12 Security Update : qemu (SUSE-SU-2016:1703-1)	Nessus	SuSE Local Security Checks	critical
93169	SUSE SLES11 Security Update : kvm (SUSE-SU-2016:1698-1)	Nessus	SuSE Local Security Checks	critical
91980	openSUSE Security Update : qemu (openSUSE-2016-839)	Nessus	SuSE Local Security Checks	critical
91660	SUSE SLED12 / SLES12 Security Update : qemu (SUSE-SU-2016:1560-1)	Nessus	SuSE Local Security Checks	critical
89456	Fedora 22 : xen-4.5.1-9.fc22 (2015-efc1d7ba5e)	Nessus	Fedora Local Security Checks	high
89186	Fedora 23 : xen-4.5.1-9.fc23 (2015-28cfce6702)	Nessus	Fedora Local Security Checks	high
89126	Fedora 21 : xen-4.4.3-4.fc21 (2015-015aec3bf2)	Nessus	Fedora Local Security Checks	high
88587	GLSA-201602-01 : QEMU: Multiple vulnerabilities (Venom)	Nessus	Gentoo Local Security Checks	critical
87688	FreeBSD : qemu -- buffer overflow vulnerability in virtio-serial message exchanges (21e5abe3-b0c6-11e5-8d13-bc5ff45d0f28)	Nessus	FreeBSD Local Security Checks	medium
85755	Debian DSA-3349-1 : qemu-kvm - security update	Nessus	Debian Local Security Checks	medium
85754	Debian DSA-3348-1 : qemu - security update	Nessus	Debian Local Security Checks	medium
85727	Fedora 21 : qemu-2.1.3-9.fc21 (2015-13404)	Nessus	Fedora Local Security Checks	high
85683	Ubuntu 14.04 LTS : QEMU vulnerabilities (USN-2724-1)	Nessus	Ubuntu Local Security Checks	medium
85592	Fedora 23 : qemu-2.4.0-1.fc23 (2015-13358)	Nessus	Fedora Local Security Checks	medium
85480	Fedora 22 : qemu-2.3.1-1.fc22 (2015-13402)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2015-5745

medium

Tenable Plugins

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