The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2018-4289 advisory.

  - An out-of-bounds memory access issue was found in Quick Emulator (QEMU) before 1.7.2 in the VNC display     driver. This flaw could occur while refreshing the VNC display surface area in the     'vnc_refresh_server_surface'. A user inside a guest could use this flaw to crash the QEMU process.
    (CVE-2017-2633)

  - Integer overflow in the load_multiboot function in hw/i386/multiboot.c in QEMU (aka Quick Emulator) allows     local guest OS users to execute arbitrary code on the host via crafted multiboot header address values,     which trigger an out-of-bounds write. (CVE-2017-14167)

  - The mode4and5 write functions in hw/display/cirrus_vga.c in Qemu allow local OS guest privileged users to     cause a denial of service (out-of-bounds write access and Qemu process crash) via vectors related to dst     calculation. (CVE-2017-15289)

  - Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow     unauthorized disclosure of information to an attacker with local user access via a side-channel analysis.
    (CVE-2017-5715)

  - Systems with microprocessors utilizing speculative execution and branch prediction may allow unauthorized     disclosure of information to an attacker with local user access via a side-channel analysis.
    (CVE-2017-5753)

  - Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow     unauthorized disclosure of information to an attacker with local user access via a side-channel analysis     of the data cache. (CVE-2017-5754)

  - The vga_draw_text function in Qemu allows local OS guest privileged users to cause a denial of service     (out-of-bounds read and QEMU process crash) by leveraging improper memory address validation.
    (CVE-2018-5683)

  - QEMU (aka Quick Emulator), when built with the VGA display emulator support, allows local guest OS     privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) via vectors     involving display update. (CVE-2017-13672)

  - 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)

  - VNC server implementation in Quick Emulator (QEMU) 2.11.0 and older was found to be vulnerable to an     unbounded memory allocation issue, as it did not throttle the framebuffer updates sent to its client. If     the client did not consume these updates, VNC server allocates growing memory to hold onto this data. A     malicious remote VNC client could use this flaw to cause DoS to the server host. (CVE-2017-15124)

  - Qemu through 2.10.0 allows remote attackers to cause a memory leak by triggering slow data-channel read     operations, related to io/channel-websock.c. (CVE-2017-15268)

  - Quick Emulator (aka QEMU), when built with the Cirrus CLGD 54xx VGA Emulator support, allows local guest     OS privileged users to cause a denial of service (out-of-bounds access and QEMU process crash) by     leveraging incorrect region calculation when updating VGA display. (CVE-2018-7858)

  - Systems with microprocessors utilizing speculative execution and speculative execution of memory reads     before the addresses of all prior memory writes are known may allow unauthorized disclosure of information     to an attacker with local user access via a side-channel analysis, aka Speculative Store Bypass (SSB),     Variant 4. (CVE-2018-3639)

  - The load_multiboot function in hw/i386/multiboot.c in Quick Emulator (aka QEMU) allows local guest OS     users to execute arbitrary code on the QEMU host via a mh_load_end_addr value greater than     mh_bss_end_addr, which triggers an out-of-bounds read or write memory access. (CVE-2018-7550)

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

  - 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)

  - 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 files on a shared host     directory. 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-2017-7471)

  - A stack buffer overflow flaw was found in the Quick Emulator (QEMU) before 2.9 built with the Network     Block Device (NBD) client support. The flaw could occur while processing server's response to a     'NBD_OPT_LIST' request. A malicious NBD server could use this issue to crash a remote NBD client resulting     in DoS or potentially execute arbitrary code on client host with privileges of the QEMU process.
    (CVE-2017-2630)

  - 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 address_space_write_continue function in exec.c in QEMU (aka Quick Emulator) allows local guest OS     privileged users to cause a denial of service (out-of-bounds access and guest instance crash) by     leveraging use of qemu_map_ram_ptr to access guest ram block area. (CVE-2017-11334)

  - The Virtio Vring implementation in QEMU allows local OS guest users to cause a denial of service (divide-     by-zero error and QEMU process crash) by unsetting vring alignment while updating Virtio rings.
    (CVE-2017-17381)

  - 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)

  - 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 (aka Quick Emulator), when built with MegaRAID SAS 8708EM2 Host Bus Adapter emulation support, allows     local guest OS privileged users to cause a denial of service (NULL pointer dereference and QEMU process     crash) via vectors involving megasas command processing. (CVE-2017-9503)

  - QEMU (aka Quick Emulator), when built with the IDE disk and CD/DVD-ROM Emulator support, allows local     guest OS privileged users to cause a denial of service (NULL pointer dereference and QEMU process crash)     by flushing an empty CDROM device drive. (CVE-2017-12809)

  - Race condition in the v9fs_xattrwalk function in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allows local     guest OS users to obtain sensitive information from host heap memory via vectors related to reading     extended attributes. (CVE-2017-15038)

  - The Network Block Device (NBD) server in Quick Emulator (QEMU) before 2.11 is vulnerable to a denial of     service issue. It could occur if a client sent large option requests, making the server waste CPU time on     reading up to 4GB per request. A client could use this flaw to keep the NBD server from serving other     requests, resulting in DoS. (CVE-2017-15119)

  - hw/input/ps2.c in Qemu does not validate 'rptr' and 'count' values during guest migration, leading to out-     of-bounds access. (CVE-2017-16845)

  - The cirrus_invalidate_region function in hw/display/cirrus_vga.c in Qemu allows local OS guest privileged     users to cause a denial of service (out-of-bounds array access and QEMU process crash) via vectors related     to negative pitch. (CVE-2017-18030)

  - 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 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 the keyboard input event handlers support in QEMU (aka Quick Emulator) allows local guest     OS privileged users to cause a denial of service (host memory consumption) by rapidly generating large     keyboard events. (CVE-2017-8379)

  - 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)

  - The vga display update in mis-calculated the region for the dirty bitmap snapshot in case split screen     mode is used causing a denial of service (assertion failure) in the cpu_physical_memory_snapshot_get_dirty     function. (CVE-2017-13673)

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-2018-4262 advisory.

  - An out-of-bounds memory access issue was found in Quick Emulator (QEMU) before 1.7.2 in the VNC display     driver. This flaw could occur while refreshing the VNC display surface area in the     'vnc_refresh_server_surface'. A user inside a guest could use this flaw to crash the QEMU process.
    (CVE-2017-2633)

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

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

  - 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 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)

  - 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)

  - 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 files on a shared host     directory. 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-2017-7471)

  - A stack buffer overflow flaw was found in the Quick Emulator (QEMU) before 2.9 built with the Network     Block Device (NBD) client support. The flaw could occur while processing server's response to a     'NBD_OPT_LIST' request. A malicious NBD server could use this issue to crash a remote NBD client resulting     in DoS or potentially execute arbitrary code on client host with privileges of the QEMU process.
    (CVE-2017-2630)

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

The remote host is affected by the vulnerability described in GLSA-201704-01 (QEMU: Multiple vulnerabilities)

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

    Remote server can cause a crash in the client causing execution of       arbitrary code, and a Denial of Service within the QEMU process. Remote       or Local users within a guest QEMU environment can cause a Denial of       Service condition of the QEMU guest process.
  Workaround :

    There is no known workaround at this time.

An update for qemu-kvm-rhev is now available for RHEV 4.X RHEV-H and Agents for RHEL 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines that use KVM in environments managed by Red Hat products.

The following packages have been upgraded to a later upstream version:
qemu-kvm-rhev (2.9.0). (BZ#1387372, BZ#1387600, BZ#1400962)

Security Fix(es) :

* A stack-based buffer overflow flaw was found in the Quick Emulator (QEMU) built with the Network Block Device (NBD) client support. The flaw could occur while processing server's response to a 'NBD_OPT_LIST' request. A malicious NBD server could use this issue to crash a remote NBD client resulting in DoS or potentially execute arbitrary code on client host with privileges of the QEMU process.
(CVE-2017-2630)

* 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)

* An information exposure flaw was found in Quick Emulator (QEMU) in Task Priority Register (TPR) optimizations for 32-bit Windows guests.
The flaw could occur while accessing TPR. A privileged user inside a guest could use this issue to read portions of the host memory.
(CVE-2016-4020)

* A memory-leak flaw was found in the Quick Emulator(QEMU) built with USB xHCI controller emulation support. The flaw could occur while doing a USB-device unplug operation. Unplugging the device repeatedly resulted in leaking host memory, affecting other services on the host.
A privileged user inside the guest could exploit this flaw to cause a denial of service on the host or potentially crash the host's QEMU process instance. (CVE-2016-7466)

* Multiple CVEs(CVE-2016-10155, CVE-2016-4020, CVE-2016-6835, CVE-2016-6888, CVE-2016-7422, CVE-2016-7466, CVE-2016-8576, CVE-2016-8669, CVE-2016-8909, CVE-2016-8910, CVE-2016-9907, CVE-2016-9911, CVE-2016-9921, CVE-2016-9922, CVE-2017-2630, CVE-2017-5579, CVE-2017-5898, CVE-2017-5973, CVE-2017-9310, CVE-2017-9373, CVE-2017-9374, CVE-2017-9375) were fixed as result of rebase to QEMU version 2.9.0.

Red Hat would like to thank Li Qiang (Qihoo 360 Inc.) for reporting CVE-2016-6835 and CVE-2016-6888; Li Qiang (360.cn Inc.) for reporting CVE-2017-5898, CVE-2016-7466, CVE-2016-10155, CVE-2017-5579, and CVE-2017-5973; Donghai Zdh (Alibaba Inc.) for reporting CVE-2016-4020;
Qinghao Tang (Marvel Team 360.cn Inc.) and Zhenhao Hong (Marvel Team 360.cn Inc.) for reporting CVE-2016-7422; PSIRT (Huawei Inc.) for reporting CVE-2016-8669; Andrew Henderson (Intelligent Automation Inc.) for reporting CVE-2016-8910; Qinghao Tang (Qihoo 360), Li Qiang (Qihoo 360), and Jiangxin (Huawei Inc.) for reporting CVE-2016-9921 and CVE-2016-9922; and Li Qiang (Qihoo 360 Gear Team) for reporting CVE-2017-9310, CVE-2017-9373, CVE-2017-9374, and CVE-2017-9375.

Additional Changes :

This update also fixes several bugs and adds various enhancements.
Documentation for these changes is available from the Release Notes document linked to in the References section.

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

  - An out-of-bounds memory access issue was found in Quick Emulator (QEMU) before 1.7.2 in the VNC display     driver. This flaw could occur while refreshing the VNC display surface area in the     'vnc_refresh_server_surface'. A user inside a guest could use this flaw to crash the QEMU process.
    (CVE-2017-2633)

  - Integer overflow in the load_multiboot function in hw/i386/multiboot.c in QEMU (aka Quick Emulator) allows     local guest OS users to execute arbitrary code on the host via crafted multiboot header address values,     which trigger an out-of-bounds write. (CVE-2017-14167)

  - The mode4and5 write functions in hw/display/cirrus_vga.c in Qemu allow local OS guest privileged users to     cause a denial of service (out-of-bounds write access and Qemu process crash) via vectors related to dst     calculation. (CVE-2017-15289)

  - Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow     unauthorized disclosure of information to an attacker with local user access via a side-channel analysis.
    (CVE-2017-5715)

  - Systems with microprocessors utilizing speculative execution and branch prediction may allow unauthorized     disclosure of information to an attacker with local user access via a side-channel analysis.
    (CVE-2017-5753)

  - Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow     unauthorized disclosure of information to an attacker with local user access via a side-channel analysis     of the data cache. (CVE-2017-5754)

  - The vga_draw_text function in Qemu allows local OS guest privileged users to cause a denial of service     (out-of-bounds read and QEMU process crash) by leveraging improper memory address validation.
    (CVE-2018-5683)

  - QEMU (aka Quick Emulator), when built with the VGA display emulator support, allows local guest OS     privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) via vectors     involving display update. (CVE-2017-13672)

  - 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)

  - VNC server implementation in Quick Emulator (QEMU) 2.11.0 and older was found to be vulnerable to an     unbounded memory allocation issue, as it did not throttle the framebuffer updates sent to its client. If     the client did not consume these updates, VNC server allocates growing memory to hold onto this data. A     malicious remote VNC client could use this flaw to cause DoS to the server host. (CVE-2017-15124)

  - Qemu through 2.10.0 allows remote attackers to cause a memory leak by triggering slow data-channel read     operations, related to io/channel-websock.c. (CVE-2017-15268)

  - Quick Emulator (aka QEMU), when built with the Cirrus CLGD 54xx VGA Emulator support, allows local guest     OS privileged users to cause a denial of service (out-of-bounds access and QEMU process crash) by     leveraging incorrect region calculation when updating VGA display. (CVE-2018-7858)

  - Systems with microprocessors utilizing speculative execution and speculative execution of memory reads     before the addresses of all prior memory writes are known may allow unauthorized disclosure of information     to an attacker with local user access via a side-channel analysis, aka Speculative Store Bypass (SSB),     Variant 4. (CVE-2018-3639)

  - The load_multiboot function in hw/i386/multiboot.c in Quick Emulator (aka QEMU) allows local guest OS     users to execute arbitrary code on the QEMU host via a mh_load_end_addr value greater than     mh_bss_end_addr, which triggers an out-of-bounds read or write memory access. (CVE-2018-7550)

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

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

  - 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 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)

  - 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)

  - 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 files on a shared host     directory. 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-2017-7471)

  - A stack buffer overflow flaw was found in the Quick Emulator (QEMU) before 2.9 built with the Network     Block Device (NBD) client support. The flaw could occur while processing server's response to a     'NBD_OPT_LIST' request. A malicious NBD server could use this issue to crash a remote NBD client resulting     in DoS or potentially execute arbitrary code on client host with privileges of the QEMU process.
    (CVE-2017-2630)

  - 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 address_space_write_continue function in exec.c in QEMU (aka Quick Emulator) allows local guest OS     privileged users to cause a denial of service (out-of-bounds access and guest instance crash) by     leveraging use of qemu_map_ram_ptr to access guest ram block area. (CVE-2017-11334)

  - The Virtio Vring implementation in QEMU allows local OS guest users to cause a denial of service (divide-     by-zero error and QEMU process crash) by unsetting vring alignment while updating Virtio rings.
    (CVE-2017-17381)

  - 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)

  - 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 (aka Quick Emulator), when built with MegaRAID SAS 8708EM2 Host Bus Adapter emulation support, allows     local guest OS privileged users to cause a denial of service (NULL pointer dereference and QEMU process     crash) via vectors involving megasas command processing. (CVE-2017-9503)

  - QEMU (aka Quick Emulator), when built with the IDE disk and CD/DVD-ROM Emulator support, allows local     guest OS privileged users to cause a denial of service (NULL pointer dereference and QEMU process crash)     by flushing an empty CDROM device drive. (CVE-2017-12809)

  - Race condition in the v9fs_xattrwalk function in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allows local     guest OS users to obtain sensitive information from host heap memory via vectors related to reading     extended attributes. (CVE-2017-15038)

  - The Network Block Device (NBD) server in Quick Emulator (QEMU) before 2.11 is vulnerable to a denial of     service issue. It could occur if a client sent large option requests, making the server waste CPU time on     reading up to 4GB per request. A client could use this flaw to keep the NBD server from serving other     requests, resulting in DoS. (CVE-2017-15119)

  - hw/input/ps2.c in Qemu does not validate 'rptr' and 'count' values during guest migration, leading to out-     of-bounds access. (CVE-2017-16845)

  - The cirrus_invalidate_region function in hw/display/cirrus_vga.c in Qemu allows local OS guest privileged     users to cause a denial of service (out-of-bounds array access and QEMU process crash) via vectors related     to negative pitch. (CVE-2017-18030)

  - 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 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 the keyboard input event handlers support in QEMU (aka Quick Emulator) allows local guest     OS privileged users to cause a denial of service (host memory consumption) by rapidly generating large     keyboard events. (CVE-2017-8379)

  - 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)

  - The vga display update in mis-calculated the region for the dirty bitmap snapshot in case split screen     mode is used causing a denial of service (assertion failure) in the cpu_physical_memory_snapshot_get_dirty     function. (CVE-2017-13673)

  - A flaw was found in qemu Media Transfer Protocol (MTP) before version 3.1.0. A path traversal in the in     usb_mtp_write_data function in hw/usb/dev-mtp.c due to an improper filename sanitization. When the guest     device is mounted in read-write mode, this allows to read/write arbitrary files which may lead do DoS     scenario OR possibly lead to code execution on the host. (CVE-2018-16867)

  - 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)

  - A flaw was found in qemu 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/rdma/rdma_backend.c in QEMU allows guest OS users to trigger out-of-bounds access via a PvrdmaSqWqe     ring element with a large num_sge value. (CVE-2018-20124)

  - QEMU can have an infinite loop in hw/rdma/vmw/pvrdma_dev_ring.c because return values are not checked (and
    -1 is mishandled). (CVE-2018-20216)

  - hw/rdma/vmw/pvrdma_cmd.c in QEMU allows attackers to cause a denial of service (NULL pointer dereference     or excessive memory allocation) in create_cq_ring or create_qp_rings. (CVE-2018-20125)

  - hw/rdma/vmw/pvrdma_cmd.c in QEMU allows create_cq and create_qp memory leaks because errors are     mishandled. (CVE-2018-20126)

  - 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)

  - An OOB heap buffer r/w access issue was found in the NVM Express Controller emulation in QEMU. It could     occur in nvme_cmb_ops routines in nvme device. A guest user/process could use this flaw to crash the QEMU     process resulting in DoS or potentially run arbitrary code with privileges of the QEMU process.
    (CVE-2018-16847)

  - 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)

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-2018-4285 advisory.

  - An out-of-bounds memory access issue was found in Quick Emulator (QEMU) before 1.7.2 in the VNC display     driver. This flaw could occur while refreshing the VNC display surface area in the     'vnc_refresh_server_surface'. A user inside a guest could use this flaw to crash the QEMU process.
    (CVE-2017-2633)

  - Integer overflow in the load_multiboot function in hw/i386/multiboot.c in QEMU (aka Quick Emulator) allows     local guest OS users to execute arbitrary code on the host via crafted multiboot header address values,     which trigger an out-of-bounds write. (CVE-2017-14167)

  - The mode4and5 write functions in hw/display/cirrus_vga.c in Qemu allow local OS guest privileged users to     cause a denial of service (out-of-bounds write access and Qemu process crash) via vectors related to dst     calculation. (CVE-2017-15289)

  - Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow     unauthorized disclosure of information to an attacker with local user access via a side-channel analysis.
    (CVE-2017-5715)

  - Systems with microprocessors utilizing speculative execution and branch prediction may allow unauthorized     disclosure of information to an attacker with local user access via a side-channel analysis.
    (CVE-2017-5753)

  - Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow     unauthorized disclosure of information to an attacker with local user access via a side-channel analysis     of the data cache. (CVE-2017-5754)

  - The vga_draw_text function in Qemu allows local OS guest privileged users to cause a denial of service     (out-of-bounds read and QEMU process crash) by leveraging improper memory address validation.
    (CVE-2018-5683)

  - QEMU (aka Quick Emulator), when built with the VGA display emulator support, allows local guest OS     privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) via vectors     involving display update. (CVE-2017-13672)

  - 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)

  - VNC server implementation in Quick Emulator (QEMU) 2.11.0 and older was found to be vulnerable to an     unbounded memory allocation issue, as it did not throttle the framebuffer updates sent to its client. If     the client did not consume these updates, VNC server allocates growing memory to hold onto this data. A     malicious remote VNC client could use this flaw to cause DoS to the server host. (CVE-2017-15124)

  - Qemu through 2.10.0 allows remote attackers to cause a memory leak by triggering slow data-channel read     operations, related to io/channel-websock.c. (CVE-2017-15268)

  - Quick Emulator (aka QEMU), when built with the Cirrus CLGD 54xx VGA Emulator support, allows local guest     OS privileged users to cause a denial of service (out-of-bounds access and QEMU process crash) by     leveraging incorrect region calculation when updating VGA display. (CVE-2018-7858)

  - Systems with microprocessors utilizing speculative execution and speculative execution of memory reads     before the addresses of all prior memory writes are known may allow unauthorized disclosure of information     to an attacker with local user access via a side-channel analysis, aka Speculative Store Bypass (SSB),     Variant 4. (CVE-2018-3639)

  - The load_multiboot function in hw/i386/multiboot.c in Quick Emulator (aka QEMU) allows local guest OS     users to execute arbitrary code on the QEMU host via a mh_load_end_addr value greater than     mh_bss_end_addr, which triggers an out-of-bounds read or write memory access. (CVE-2018-7550)

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

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

  - 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 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)

  - 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)

  - 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 files on a shared host     directory. 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-2017-7471)

  - A stack buffer overflow flaw was found in the Quick Emulator (QEMU) before 2.9 built with the Network     Block Device (NBD) client support. The flaw could occur while processing server's response to a     'NBD_OPT_LIST' request. A malicious NBD server could use this issue to crash a remote NBD client resulting     in DoS or potentially execute arbitrary code on client host with privileges of the QEMU process.
    (CVE-2017-2630)

  - 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 address_space_write_continue function in exec.c in QEMU (aka Quick Emulator) allows local guest OS     privileged users to cause a denial of service (out-of-bounds access and guest instance crash) by     leveraging use of qemu_map_ram_ptr to access guest ram block area. (CVE-2017-11334)

  - The Virtio Vring implementation in QEMU allows local OS guest users to cause a denial of service (divide-     by-zero error and QEMU process crash) by unsetting vring alignment while updating Virtio rings.
    (CVE-2017-17381)

  - 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)

  - 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 (aka Quick Emulator), when built with MegaRAID SAS 8708EM2 Host Bus Adapter emulation support, allows     local guest OS privileged users to cause a denial of service (NULL pointer dereference and QEMU process     crash) via vectors involving megasas command processing. (CVE-2017-9503)

  - QEMU (aka Quick Emulator), when built with the IDE disk and CD/DVD-ROM Emulator support, allows local     guest OS privileged users to cause a denial of service (NULL pointer dereference and QEMU process crash)     by flushing an empty CDROM device drive. (CVE-2017-12809)

  - Race condition in the v9fs_xattrwalk function in hw/9pfs/9p.c in QEMU (aka Quick Emulator) allows local     guest OS users to obtain sensitive information from host heap memory via vectors related to reading     extended attributes. (CVE-2017-15038)

  - The Network Block Device (NBD) server in Quick Emulator (QEMU) before 2.11 is vulnerable to a denial of     service issue. It could occur if a client sent large option requests, making the server waste CPU time on     reading up to 4GB per request. A client could use this flaw to keep the NBD server from serving other     requests, resulting in DoS. (CVE-2017-15119)

  - hw/input/ps2.c in Qemu does not validate 'rptr' and 'count' values during guest migration, leading to out-     of-bounds access. (CVE-2017-16845)

  - The cirrus_invalidate_region function in hw/display/cirrus_vga.c in Qemu allows local OS guest privileged     users to cause a denial of service (out-of-bounds array access and QEMU process crash) via vectors related     to negative pitch. (CVE-2017-18030)

  - 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 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 the keyboard input event handlers support in QEMU (aka Quick Emulator) allows local guest     OS privileged users to cause a denial of service (host memory consumption) by rapidly generating large     keyboard events. (CVE-2017-8379)

  - 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)

  - The vga display update in mis-calculated the region for the dirty bitmap snapshot in case split screen     mode is used causing a denial of service (assertion failure) in the cpu_physical_memory_snapshot_get_dirty     function. (CVE-2017-13673)

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	Published	Updated	Severity
180858	Oracle Linux 7 : qemu (ELSA-2018-4289)	Nessus	Oracle Linux Local Security Checks	9/7/2023	9/8/2023	critical
180821	Oracle Linux 7 : qemu (ELSA-2018-4262)	Nessus	Oracle Linux Local Security Checks	9/7/2023	9/7/2023	critical
99274	GLSA-201704-01 : QEMU: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	4/11/2017	6/3/2021	critical
102158	RHEL 7 : qemu-kvm-rhev (RHSA-2017:2392)	Nessus	Red Hat Local Security Checks	8/3/2017	10/24/2019	high
180740	Oracle Linux 7 : qemu (ELSA-2019-4585)	Nessus	Oracle Linux Local Security Checks	9/7/2023	9/8/2023	critical
180778	Oracle Linux 7 : qemu (ELSA-2018-4285)	Nessus	Oracle Linux Local Security Checks	9/7/2023	9/8/2023	critical

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