The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-4980 advisory.

  - Several memory leaks were found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions     up to and including 6.0. They exist in contrib/vhost-user-gpu/vhost-user-gpu.c and contrib/vhost-user-     gpu/virgl.c due to improper release of memory (i.e., free) after effective lifetime. (CVE-2021-3544)

  - An information disclosure vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of     QEMU in versions up to and including 6.0. The flaw exists in virgl_cmd_get_capset_info() in contrib/vhost-     user-gpu/virgl.c and could occur due to the read of uninitialized memory. A malicious guest could exploit     this issue to leak memory from the host. (CVE-2021-3545)

  - A flaw was found in vhost-user-gpu of QEMU in versions up to and including 6.0. An out-of-bounds write     vulnerability can allow a malicious guest to crash the QEMU process on the host resulting in a denial of     service or potentially execute arbitrary code on the host with the privileges of the QEMU process. The     highest threat from this vulnerability is to data confidentiality and integrity as well as system     availability. (CVE-2021-3546)

  - A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs     when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A     malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata,     resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the     host. (CVE-2021-3682)

  - An out-of-bounds write flaw was found in the UAS (USB Attached SCSI) device emulation of QEMU in versions     prior to 6.2.0-rc0. The device uses the guest supplied stream number unchecked, which can lead to out-of-     bounds access to the UASDevice->data3 and UASDevice->status3 fields. A malicious guest user could use this     flaw to crash QEMU or potentially achieve code execution with the privileges of the QEMU process on the     host. (CVE-2021-3713)

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

Detections

Analytics

Debian DSA-4980-1 : qemu - security update

high Nessus Plugin ID 153865

Version 1.5

Version 1.4

Version 1.5 Nov 29, 2023, 3:21 PM CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:POC/RL:OF/RC:C". "CVSSv3 temporal vector" set to "CVSS:3.0/E:P/RL:O/RC:C") Exploit attributes ("Exploit available" set to "True". "Exploitability ease" changed from "No known exploits are available" to "Exploits are available") Plugin Feed: 202311291521
Version 1.4 Jan 10, 2023, 4:22 PM CVSS metrics ("CVSSv2 score" changed from "7.2" to "6.9") CVSS metrics ("CVSSv2 vector" changed from "CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C" to "CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C") CVSS metrics ("CVSSv3 score" changed from "8.8" to "8.5") CVSS metrics ("CVSSv3 vector" changed from "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H" to "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H") CVSSv2 severity (based on CVE-2021-3748, severity decreased from "High" to "Medium") CVSSv3 score source (set to "CVE-2021-3682") Plugin Feed: 202301101622