Medium: libmspack

Issue Overview:

In mspack/cab.h in libmspack before 0.8alpha and cabextract before 1.8, the CAB block input buffer is one byte too small for the maximal Quantum block, leading to an out-of-bounds write.(CVE-2018-18584)

chmd_read_headers in mspack/chmd.c in libmspack before 0.8alpha accepts a filename that has ‘\\0’ as its first or second character (such as the “/\\0” name).(CVE-2018-18585)

Affected Packages:

libmspack

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 libmspack to update your system.

New Packages:

aarch64:  
    libmspack-0.5-0.7.alpha.amzn2.aarch64  
    libmspack-devel-0.5-0.7.alpha.amzn2.aarch64  
    libmspack-debuginfo-0.5-0.7.alpha.amzn2.aarch64  
  
i686:  
    libmspack-0.5-0.7.alpha.amzn2.i686  
    libmspack-devel-0.5-0.7.alpha.amzn2.i686  
    libmspack-debuginfo-0.5-0.7.alpha.amzn2.i686  
  
src:  
    libmspack-0.5-0.7.alpha.amzn2.src  
  
x86_64:  
    libmspack-0.5-0.7.alpha.amzn2.x86_64  
    libmspack-devel-0.5-0.7.alpha.amzn2.x86_64  
    libmspack-debuginfo-0.5-0.7.alpha.amzn2.x86_64  

Additional References

Red Hat: CVE-2018-18584, CVE-2018-18585

Mitre: CVE-2018-18584, CVE-2018-18585