Double Free Affecting libxml2 package, versions <0:2.9.7-16.el8_8.1


0.0
medium

Snyk CVSS

    Attack Complexity Low
    User Interaction Required
    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-ORACLE8-LIBXML2-5838145
  • published 3 Aug 2023
  • disclosed 24 Apr 2023

How 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).