SB2021102723 - SUSE update for libvirt 

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Main Vulnerability Database SB2021102723

SB2021102723 - SUSE update for libvirt

Published: October 27, 2021

Security Bulletin ID SB2021102723
Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Improper locking (CVE-ID: CVE-2021-3667)

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 virStoragePoolLookupByTargetPath API in libvirt in storage/storage_driver.c. The storagePoolLookupByTargetPath() function does not properly release a locked object (virStoragePoolObj) on ACL permission failure. Clients connecting to the read-write socket with limited ACL permissions can use this vulnerability to acquire the lock and prevent other users from accessing storage pool/volume APIs. As a result a local user can perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References