#VU62737 Improper locking in libvirt - CVE-2021-4147

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Main Vulnerability Database Vulnerabilities #VU62737

#VU62737 Improper locking in libvirt - CVE-2021-4147

Published: May 3, 2022


Vulnerability identifier: #VU62737
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-4147
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
libvirt
Software vendor:
libvirt.org

Description

The vulnerability allows a local user to perform a denial of service attack (DoS) on the target system.

The vulnerability exists due to double-locking error in the libvirt libxl driver in libxl/libxl_domain.c. A malicious guest can continuously reboot itself and cause libvirtd on the host to deadlock or crash, resulting in a denial of service condition


Remediation

Install updates from vendor's website.

External links