Description
The sslConnectTimeout function in ssl.c for Squid 2.5.STABLE10 and earlier allows remote attackers to cause a denial of service (segmentation fault) via certain crafted requests.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | squid | 2.5.10-5 | — |
| Debian 13 | squid | 2.5.10-5 | — |
| Debian 12 | squid | 2.5.10-5 | — |
| Debian 3.1 | squid | 2.5.9-10sarge1 | DSA-809-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 4 | squid | 7:2.5.STABLE6-3.4E.11 | RHSA-2005:766 |
| RHEL 3 | squid | 7:2.5.STABLE3-6.3E.14 | RHSA-2005:766 |
Advisories 2
- RHSA-2005:766 Red Hat Security Advisory: squid security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-809-1 squid - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- 14731 vdb-entry
- oval:org.mitre.oval:def:10522 vdb-entry signature
- MDKSA-2005:162 vendor-advisory
- 1014846 vdb-entry
- DSA-809 vendor-advisory
- SUSE-SA:2005:053 vendor-advisory
- SUSE-SR:2005:021 vendor-advisory
- FLSA-2006:152809 vendor-advisory
- GLSA-200509-06 vendor-advisory
- http://www.squid-cache.org/Versions/v2/2.5/bugs/#squid-2.5.STABLE10-sslConnectTimeout
- RHSA-2005:766 vendor-advisory
- 17027 third-party-advisory
- 16977 third-party-advisory