All vulnerabilities

Servers and applications

CVE-2020-8517

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…

Severity
High 7.5
Published
4 Feb 2020
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
4.10
Sources
NVD

Affected software

SoftwareAffected versions
SquidServers and applications · cpe:a:squid-cache:squid
  • Every version before 4.10

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2020-8517
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2020-8517