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Ubuntu: USN-5399-1 (CVE-2021-3975): libvirt vulnerabilities

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Ubuntu: USN-5399-1 (CVE-2021-3975): libvirt vulnerabilities

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
01/05/2022
Created
05/05/2022
Added
05/03/2022
Modified
05/01/2023

Description

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.

Solution(s)

  • ubuntu-upgrade-libvirt-daemon
  • ubuntu-upgrade-libvirt-daemon-system
  • ubuntu-upgrade-libvirt0

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