CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2023-46724
High (7.5) in squid-cache squid. EPSS 4.0% chance of exploitation in the next 30 days.
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 crafted SSL Certificate in a server certificate chain. This attack is limited to HTTPS and SSL-Bump. This bug is fixed in Squid version 6.4. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. Those who you use a prepackaged version of Squid should refer to the package vendor for availability information on updated packages.
Severity
- EPSS
- 4.0% chance of exploitation in the next 30 days; higher than 90% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-295, CWE-125, CWE-129, CWE-786, CWE-823, CWE-1285
- Published
- Modified
- Record from
- the NVD, synced
Affected
- squid-cache:squid
References
- http://www.squid-cache.org/Versions/v5/SQUID-2023_4.patch
- http://www.squid-cache.org/Versions/v6/SQUID-2023_4.patch
- https://github.com/squid-cache/squid/commit/b70f864940225dfe69f9f653f948e787f99c3810
- https://github.com/squid-cache/squid/security/advisories/GHSA-73m6-jm96-c6r3
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/