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Servers and applications

CVE-2021-28116

SQUID-2020:12 Out-Of-Bounds memory access in WCCPv2

Severity
Medium 5.3
Published
9 Mar 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Also known as
GHSA-rgf3-9v3p-qp82
Sources
NVD, Project advisories (GitHub)

Description

Squid through 4.14 and 5.x through 5.0.5, in some configurations, allows information disclosure because of an out-of-bounds read in WCCP protocol data. This can be leveraged as part of a chain for remote code execution as nobody.

Affected software

SoftwareAffected versions
SquidServers and applications · cpe:a:squid-cache:squid
  • Every version up to 4.14
  • From 5.0 up to 5.0.5
SquidServers and applications · github:squid-cache/squid
  • Version 2.6.STABLE1-3.5.28

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-28116
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-28116
  • GitHub Advisory Database https://github.com/advisories/GHSA-rgf3-9v3p-qp82
  • github.com https://github.com/squid-cache/squid/security/advisories/GHSA-rgf3-9v3p-qp82