Important: libxml2

Issue Overview:

libxml2 through 2.11.5 has a use-after-free that can only occur after a certain memory allocation fails. This occurs in xmlUnlinkNode in tree.c. NOTE: the vendor’s position is “I don’t think these issues are critical enough to warrant a CVE ID … because an attacker typically can’t control when memory allocations fail.” (CVE-2023-45322)

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.amzn2.5.13.aarch64  
    libxml2-devel-2.9.1-6.amzn2.5.13.aarch64  
    libxml2-static-2.9.1-6.amzn2.5.13.aarch64  
    libxml2-python-2.9.1-6.amzn2.5.13.aarch64  
    libxml2-debuginfo-2.9.1-6.amzn2.5.13.aarch64  
  
i686:  
    libxml2-2.9.1-6.amzn2.5.13.i686  
    libxml2-devel-2.9.1-6.amzn2.5.13.i686  
    libxml2-static-2.9.1-6.amzn2.5.13.i686  
    libxml2-python-2.9.1-6.amzn2.5.13.i686  
    libxml2-debuginfo-2.9.1-6.amzn2.5.13.i686  
  
src:  
    libxml2-2.9.1-6.amzn2.5.13.src  
  
x86_64:  
    libxml2-2.9.1-6.amzn2.5.13.x86_64  
    libxml2-devel-2.9.1-6.amzn2.5.13.x86_64  
    libxml2-static-2.9.1-6.amzn2.5.13.x86_64  
    libxml2-python-2.9.1-6.amzn2.5.13.x86_64  
    libxml2-debuginfo-2.9.1-6.amzn2.5.13.x86_64  

Additional References

Red Hat: CVE-2023-45322

Mitre: CVE-2023-45322