CVE-2021-3546

Description

An out-of-bounds write 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 occurs while processing the 'VIRTIO_GPU_CMD_GET_CAPSET' command from the guest. It could allow a privileged guest user to crash the QEMU process on the host, resulting in a denial of service condition, or potential code execution with the privileges of the QEMU process.

CVSS Metrics

• v3.1•HIGH•Score: 8.2CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
• v2.0•MEDIUM•Score: 4.6AV:L/AC:L/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 0.17%• Percentile: 38%

Techniques & Countermeasures

• CWE-787•Out-of-bounds Write

  The product writes data past the end, or before the beginning, of the intended buffer.

Affected Systems

• debian•debian_linux

  11.0

• qemu•qemu

  ≤ 6.0.0

References (5)

• http://www.openwall.com/lists/oss-security/2021/05/31/1
• https://bugzilla.redhat.com/show_bug.cgi?id=1958978
• https://security.netapp.com/advisory/ntap-20210720-0008/
• https://www.debian.org/security/2021/dsa-4980
• https://security.gentoo.org/glsa/202208-27