Use After Free Affecting libguestfs-winsupport package, versions <0:8.6-1.module+el8.6.0+14480+c0a3aa0f


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.21% (60th percentile)

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  • Snyk IDSNYK-CENTOS8-LIBGUESTFSWINSUPPORT-2819692
  • published19 Nov 2021
  • disclosed17 Nov 2021

Introduced: 17 Nov 2021

CVE-2021-3975  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Centos:8 libguestfs-winsupport to version 0:8.6-1.module+el8.6.0+14480+c0a3aa0f or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libguestfs-winsupport package and not the libguestfs-winsupport package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

A use-after-free flaw was found in libvirt. The qemuMonitorUnregister() function in qemuProcessHandleMonitorEOF is called using multiple threads without being adequately protected by a monitor lock. This flaw could be triggered by the virConnectGetAllDomainStats API when the guest is shutting down. An unprivileged client with a read-only connection could use this flaw to perform a denial of service attack by causing the libvirt daemon to crash.

CVSS Scores

version 3.1