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Improper Input Validation Affecting libxml2 package, versions <0:2.9.1-6.amzn2.5.8

0.0
medium

Snyk CVSS

    Attack Complexity High
    Availability High

    Threat Intelligence

    EPSS 0.07% (30th percentile)
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NVD
6.5 medium
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SUSE
5.9 medium
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Red Hat
5.9 medium

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  • Snyk ID SNYK-AMZN2-LIBXML2-5496478
  • published 4 May 2023
  • disclosed 24 Apr 2023
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Introduced: 24 Apr 2023

CVE-2023-29469 Open this link in a new tab
CWE-20 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2 libxml2 to version 0:2.9.1-6.amzn2.5.8 or higher.
This issue was patched in ALAS2-2023-2021.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libxml2 package and not the libxml2 package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

An issue was discovered in libxml2 before 2.10.4. When hashing empty dict strings in a crafted XML document, xmlDictComputeFastKey in dict.c can produce non-deterministic values, leading to various logic and memory errors, such as a double free. This behavior occurs because there is an attempt to use the first byte of an empty string, and any value is possible (not solely the '\0' value).