UpHeron
All vulnerabilities

Servers and applications

CVE-2023-5824

SQUID-2023:2 Multiple issues in HTTP response caching

Severity
High 7.5
Published
21 Oct 2023
Last changed
4 Nov 2026
Added to UpHeron
1 Nov 2026
Fixed in
6.4
Also known as
GHSA-543m-w2m2-g255
Sources
NVD, Project advisories (GitHub)

Description

A flaw was found in Squid. The limits applied for validation of HTTP response headers are applied before caching. However, Squid may grow a cached HTTP response header beyond the configured maximum size, causing a stall or crash of the worker process when a large header is retrieved from the disk cache, resulting in a denial of service.

Affected software

SoftwareAffected versions
SquidServers and applications · cpe:a:squid-cache:squid
  • Every version before 6.4
SquidServers and applications · github:squid-cache/squid
  • Every version before 6.4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-5824
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-5824
  • GitHub Advisory Database https://github.com/advisories/GHSA-543m-w2m2-g255
  • github.com https://github.com/squid-cache/squid/security/advisories/GHSA-543m-w2m2-g255