Double Free Affecting libxml2 package, versions <2.9.4+dfsg1-6.1ubuntu1.9
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Test your applications- Snyk ID SNYK-UBUNTU1804-LIBXML2-5420980
- published 12 Apr 2023
- disclosed 24 Apr 2023
Introduced: 12 Apr 2023
CVE-2023-29469 Open this link in a new tabHow to fix?
Upgrade Ubuntu:18.04 libxml2 to version 2.9.4+dfsg1-6.1ubuntu1.9 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libxml2 package and not the libxml2 package as distributed by Ubuntu.
See How to fix? for Ubuntu:18.04 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).