Important: squid

Issue Overview:

An issue was discovered in Squid before 4.10. Due to incorrect input validation, the NTLM authentication credentials parser in ext_lm_group_acl may write to memory outside the credentials buffer. On systems with memory access protections, this can result in the helper process being terminated unexpectedly. This leads to the Squid process also terminating and a denial of service for all clients using the proxy. (CVE-2020-8517)

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.amzn2.7.4.aarch64  
    squid-sysvinit-3.5.20-17.amzn2.7.4.aarch64  
    squid-migration-script-3.5.20-17.amzn2.7.4.aarch64  
    squid-debuginfo-3.5.20-17.amzn2.7.4.aarch64  
  
i686:  
    squid-3.5.20-17.amzn2.7.4.i686  
    squid-sysvinit-3.5.20-17.amzn2.7.4.i686  
    squid-migration-script-3.5.20-17.amzn2.7.4.i686  
    squid-debuginfo-3.5.20-17.amzn2.7.4.i686  
  
src:  
    squid-3.5.20-17.amzn2.7.4.src  
  
x86_64:  
    squid-3.5.20-17.amzn2.7.4.x86_64  
    squid-sysvinit-3.5.20-17.amzn2.7.4.x86_64  
    squid-migration-script-3.5.20-17.amzn2.7.4.x86_64  
    squid-debuginfo-3.5.20-17.amzn2.7.4.x86_64  

Additional References

Red Hat: CVE-2020-8517

Mitre: CVE-2020-8517