CLSA-2024-1717692967 libxml2: Fix of 2 CVEs

CVE-2023-29469: dict.c: fix non-deterministic hashing of empty dict strings - CVE-2023-28484: fix NULL pointer dereferences in xmlSchemaFixupComplexType and xmlSchemaCheckCOSSTDerivedOK...

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).

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DEBIAN-CVE-2023-29469

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...

PT-2023-3193

Name of the Vulnerable Software and Affected Versions libxml2 versions prior to 2.10.4 Description The issue is related to the xmlDictComputeFastKey function in dict.c, which can produce non-deterministic values when hashing empty dict strings in a crafted XML document. This can lead to various...