Important: squid

Issue Overview:

Squid is a caching proxy for the Web. Due to an Uncontrolled Recursion bug in versions 2.6 through 2.7.STABLE9, versions 3.1 through 5.9, and versions 6.0.1 through 6.5, Squid may be vulnerable to a Denial of Service attack against HTTP Request parsing. This problem allows a remote client to perform Denial of Service attack by sending a large X-Forwarded-For header when the follow_x_forwarded_for feature is configured. This bug is fixed by Squid version 6.6. In addition, patches addressing this problem for the stable releases can be found in Squid’s patch archives. (CVE-2023-50269)

Affected Packages:

squid

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 squid to update your system.

New Packages:

aarch64:  
    squid-3.5.20-17.amzn2.7.16.aarch64  
    squid-sysvinit-3.5.20-17.amzn2.7.16.aarch64  
    squid-migration-script-3.5.20-17.amzn2.7.16.aarch64  
    squid-debuginfo-3.5.20-17.amzn2.7.16.aarch64  
  
i686:  
    squid-3.5.20-17.amzn2.7.16.i686  
    squid-sysvinit-3.5.20-17.amzn2.7.16.i686  
    squid-migration-script-3.5.20-17.amzn2.7.16.i686  
    squid-debuginfo-3.5.20-17.amzn2.7.16.i686  
  
src:  
    squid-3.5.20-17.amzn2.7.16.src  
  
x86_64:  
    squid-3.5.20-17.amzn2.7.16.x86_64  
    squid-sysvinit-3.5.20-17.amzn2.7.16.x86_64  
    squid-migration-script-3.5.20-17.amzn2.7.16.x86_64  
    squid-debuginfo-3.5.20-17.amzn2.7.16.x86_64  

Additional References

Red Hat: CVE-2023-50269

Mitre: CVE-2023-50269