SB2023053152 - Ubuntu update for libvirt 

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Main Vulnerability Database SB2023053152

SB2023053152 - Ubuntu update for libvirt

Published: May 31, 2023

Security Bulletin ID SB2023053152
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Improper locking (CVE-ID: CVE-2022-0897)

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

The vulnerability exists due to double-locking error within the nwfilterConnectNumOfNWFilters() function in nwfilter/nwfilter_driver.c in libvirt. An local user can abuse the libvirt API virConnectNumOfNWFilters to crash the network filter management daemon (libvirtd/virtnwfilterd).


2) Memory leak (CVE-ID: CVE-2023-2700)

The vulnerability allows a local user to perform DoS attack on the target system.

The vulnerability exists due memory leak within the virPCIVirtualFunction array within the parent struct's g_autoptr cleanup. A local user can repeatedly query an SR-IOV PCI device's capabilities to cause memory leak and perform denial of service attack.


Remediation

Install update from vendor's website.

References