Medium: libxml2

Issue Overview:

A NULL pointer dereference exists when parsing (invalid) XML schemas in libxml2 xmlSchemaCheckCOSSTDerivedOK (CVE-2023-28484)

libxml2 Hashing of empty dict strings isn’t deterministic. When hashing empty strings which aren’t null-terminated, xmlDictComputeFastKey could produce inconsistent results. This could lead to various logic or memory errors, including double frees. (CVE-2023-29469)

Affected Packages:

libxml2

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update libxml2 to update your system.

New Packages:

aarch64:  
    libxml2-2.9.1-6.amzn2.5.8.aarch64  
    libxml2-devel-2.9.1-6.amzn2.5.8.aarch64  
    libxml2-static-2.9.1-6.amzn2.5.8.aarch64  
    libxml2-python-2.9.1-6.amzn2.5.8.aarch64  
    libxml2-debuginfo-2.9.1-6.amzn2.5.8.aarch64  
  
i686:  
    libxml2-2.9.1-6.amzn2.5.8.i686  
    libxml2-devel-2.9.1-6.amzn2.5.8.i686  
    libxml2-static-2.9.1-6.amzn2.5.8.i686  
    libxml2-python-2.9.1-6.amzn2.5.8.i686  
    libxml2-debuginfo-2.9.1-6.amzn2.5.8.i686  
  
src:  
    libxml2-2.9.1-6.amzn2.5.8.src  
  
x86_64:  
    libxml2-2.9.1-6.amzn2.5.8.x86_64  
    libxml2-devel-2.9.1-6.amzn2.5.8.x86_64  
    libxml2-static-2.9.1-6.amzn2.5.8.x86_64  
    libxml2-python-2.9.1-6.amzn2.5.8.x86_64  
    libxml2-debuginfo-2.9.1-6.amzn2.5.8.x86_64  

Additional References

Red Hat: CVE-2023-28484, CVE-2023-29469

Mitre: CVE-2023-28484, CVE-2023-29469