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Amazon Linux 2023: CVE-2023-29469: Medium priority package update for libxml2

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Amazon Linux 2023: CVE-2023-29469: Medium priority package update for libxml2

Severity
5
CVSS
(AV:N/AC:H/Au:N/C:N/I:N/A:C)
Published
04/11/2023
Created
02/14/2025
Added
02/14/2025
Modified
02/14/2025

Description

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). A flaw was found in libxml2. This issue occurs when hashing empty strings which aren't null-terminated, xmlDictComputeFastKey could produce inconsistent results, which may lead to various logic or memory errors, including double free errors.

Solution(s)

  • amazon-linux-2023-upgrade-libxml2
  • amazon-linux-2023-upgrade-libxml2-debuginfo
  • amazon-linux-2023-upgrade-libxml2-debugsource
  • amazon-linux-2023-upgrade-libxml2-devel
  • amazon-linux-2023-upgrade-libxml2-static
  • amazon-linux-2023-upgrade-python3-libxml2
  • amazon-linux-2023-upgrade-python3-libxml2-debuginfo

References

  • https://attackerkb.com/topics/cve-2023-29469
  • CVE - 2023-29469
  • https://alas.aws.amazon.com/AL2023/ALAS-2023-163.html
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