Double Free Affecting libxml2 package, versions <0:2.9.7-16.el8_8.1
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- published 3 Aug 2023
- disclosed 24 Apr 2023
Introduced: 24 Apr 2023
CVE-2023-29469 Open this link in a new tabHow to fix?
Upgrade Oracle:8 libxml2 to version 0:2.9.7-16.el8_8.1 or higher.
This issue was patched in ELSA-2023-4529.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libxml2 package and not the libxml2 package as distributed by Oracle.
See How to fix? for Oracle:8 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).
References
- https://linux.oracle.com/cve/CVE-2023-29469.html
- https://linux.oracle.com/errata/ELSA-2023-4349.html
- https://gitlab.gnome.org/GNOME/libxml2/-/issues/510
- https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.10.4
- https://lists.debian.org/debian-lts-announce/2023/04/msg00031.html
- https://security.netapp.com/advisory/ntap-20230601-0006/