Important: expat, thunderbird

Issue Overview:

An integer overflow was found in expat. The issue occurs in storeRawNames() by abusing the m_buffer expansion logic to allow allocations very close to INT_MAX and out-of-bounds heap writes. This flaw can cause a denial of service or potentially arbitrary code execution. (CVE-2022-25315)

Affected Packages:

expat, thunderbird

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 expat to update your system.

New Packages:

aarch64:  
    expat-2.1.0-12.amzn2.0.2.aarch64  
    expat-devel-2.1.0-12.amzn2.0.2.aarch64  
    expat-static-2.1.0-12.amzn2.0.2.aarch64  
    expat-debuginfo-2.1.0-12.amzn2.0.2.aarch64  
    thunderbird-91.7.0-2.amzn2.0.1.aarch64  
    thunderbird-debuginfo-91.7.0-2.amzn2.0.1.aarch64  
  
i686:  
    expat-2.1.0-12.amzn2.0.2.i686  
    expat-devel-2.1.0-12.amzn2.0.2.i686  
    expat-static-2.1.0-12.amzn2.0.2.i686  
    expat-debuginfo-2.1.0-12.amzn2.0.2.i686  
  
src:  
    expat-2.1.0-12.amzn2.0.2.src  
    thunderbird-91.7.0-2.amzn2.0.1.src  
  
x86_64:  
    expat-2.1.0-12.amzn2.0.2.x86_64  
    expat-devel-2.1.0-12.amzn2.0.2.x86_64  
    expat-static-2.1.0-12.amzn2.0.2.x86_64  
    expat-debuginfo-2.1.0-12.amzn2.0.2.x86_64  
    thunderbird-91.7.0-2.amzn2.0.1.x86_64  
    thunderbird-debuginfo-91.7.0-2.amzn2.0.1.x86_64  

Additional References

Red Hat: CVE-2022-25315

Mitre: CVE-2022-25315