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Servers and applications

CVE-2021-46784

SQUID-2021:7 Denial of Service in Gopher Processing

Severity
Medium 6.5
Published
17 Jun 2022
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
5.6
Also known as
GHSA-f5cp-6rh3-284w
Sources
NVD, Project advisories (GitHub)

Description

In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a Denial of Service can occur when processing long Gopher server responses.

Affected software

SoftwareAffected versions
SquidServers and applications · cpe:a:squid-cache:squid
  • From 3.0 up to 3.5.28
  • From 4.0 up to 4.17
  • From 5.0 before 5.6
SquidServers and applications · github:squid-cache/squid
  • From 5.0.1 before 5.6

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-46784
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-46784
  • GitHub Advisory Database https://github.com/advisories/GHSA-f5cp-6rh3-284w
  • github.com https://github.com/squid-cache/squid/security/advisories/GHSA-f5cp-6rh3-284w