Use After Free Affecting libgudev1 package, versions <0:219-78.amzn2.0.20


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
1.34% (71st percentile)

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  • Snyk IDSNYK-AMZN2-LIBGUDEV1-3042885
  • published12 Oct 2022
  • disclosed9 Sept 2022

Introduced: 9 Sep 2022

CVE-2022-2526  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 libgudev1 to version 0:219-78.amzn2.0.20 or higher.
This issue was patched in ALAS2-2022-1854.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libgudev1 package and not the libgudev1 package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

A use-after-free vulnerability was found in systemd. This issue occurs due to the on_stream_io() function and dns_stream_complete() function in 'resolved-dns-stream.c' not incrementing the reference counting for the DnsStream object. Therefore, other functions and callbacks called can dereference the DNSStream object, causing the use-after-free when the reference is still used later.

CVSS Base Scores

version 3.1