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CVE-2023-46724

SQUID-2023:4 Denial of Service in SSL Certificate validation

Severity
High 7.5
Published
1 Nov 2023
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
6.4
Also known as
GHSA-73m6-jm96-c6r3
Sources
NVD, Project advisories (GitHub)

Description

Squid is a caching proxy for the Web. Due to an Improper Validation of Specified Index bug, Squid versions 3.3.0.1 through 5.9 and 6.0 prior to 6.4 compiled using `--with-openssl` are vulnerable to a Denial of Service attack against SSL Certificate validation. This problem allows a remote server to perform Denial of Service against Squid Proxy by initiating a TLS Handshake with a specially…

Affected software

SoftwareAffected versions
SquidServers and applications · cpe:a:squid-cache:squid
  • From 3.3.0.1 before 6.4
SquidServers and applications · github:squid-cache/squid
  • From 6.0 before 6.4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-46724
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-46724
  • GitHub Advisory Database https://github.com/advisories/GHSA-73m6-jm96-c6r3
  • github.com https://github.com/squid-cache/squid/security/advisories/GHSA-73m6-jm96-c6r3