Medium: libxml2

Issue Overview:

An issue was discovered in libxml2 before 2.10.3. When parsing a multi-gigabyte XML document with the XML_PARSE_HUGE parser option enabled, several integer counters can overflow. This results in an attempt to access an array at a negative 2GB offset, typically leading to a segmentation fault. (CVE-2022-40303)

An issue was discovered in libxml2 before 2.10.3. Certain invalid XML entity definitions can corrupt a hash table key, potentially leading to subsequent logic errors. In one case, a double-free can be provoked. (CVE-2022-40304)

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.amzn2.5.7.aarch64  
    libxml2-devel-2.9.1-6.amzn2.5.7.aarch64  
    libxml2-static-2.9.1-6.amzn2.5.7.aarch64  
    libxml2-python-2.9.1-6.amzn2.5.7.aarch64  
    libxml2-debuginfo-2.9.1-6.amzn2.5.7.aarch64  
  
i686:  
    libxml2-2.9.1-6.amzn2.5.7.i686  
    libxml2-devel-2.9.1-6.amzn2.5.7.i686  
    libxml2-static-2.9.1-6.amzn2.5.7.i686  
    libxml2-python-2.9.1-6.amzn2.5.7.i686  
    libxml2-debuginfo-2.9.1-6.amzn2.5.7.i686  
  
src:  
    libxml2-2.9.1-6.amzn2.5.7.src  
  
x86_64:  
    libxml2-2.9.1-6.amzn2.5.7.x86_64  
    libxml2-devel-2.9.1-6.amzn2.5.7.x86_64  
    libxml2-static-2.9.1-6.amzn2.5.7.x86_64  
    libxml2-python-2.9.1-6.amzn2.5.7.x86_64  
    libxml2-debuginfo-2.9.1-6.amzn2.5.7.x86_64  

Additional References

Red Hat: CVE-2022-40303, CVE-2022-40304

Mitre: CVE-2022-40303, CVE-2022-40304