Description
Multiple memory leaks in tools/cachemgr.cc in cachemgr.cgi in Squid 2.x and 3.x before 3.1.22, 3.2.x before 3.2.4, and 3.3.x before 3.3.0.2 allow remote attackers to cause a denial of service (memory consumption) via (1) invalid Content-Length headers, (2) long POST requests, or (3) crafted authentication credentials.
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 | 2.7.STABLE9-2 | — |
| Debian 13 | squid | 2.7.STABLE9-2 | — |
| Debian 12 | squid | 2.7.STABLE9-2 | — |
| Debian 6.0 | squid3 | 3.1.6-1.2+squeeze3 | DSA-2631-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | squid | 7:3.1.10-16.el6 | RHSA-2013:0505 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP4 | squid3 | 3.1.23-8.16.30.1 | SUSE-SU-2016:2089-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 11 SP4 | squid3 | 3.1.23-8.16.30.1 | SUSE-SU-2016:2089-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | squid | 3.5.22-1.1 | openSUSE-SU-2024:10307-1 |
Advisories 4
- RHSA-2013:0505 Red Hat Security Advisory: squid security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-2631-1 squid3 - denial of service Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:2089-1 Security update for squid3 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10307-1 squid-3.5.22-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- DSA-2631 vendor-advisory
- RHSA-2013:0505 vendor-advisory
- MDVSA-2013:129 vendor-advisory
- 1027890 vdb-entry
- http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10479.patch
- SUSE-SU-2016:1996 vendor-advisory
- openSUSE-SU-2013:1443 vendor-advisory
- [oss-security] 20121217 Re: CVE Request -- SQUID-2012:1 / Squid: DoS (excessive resource consumption) via invalid Content-Length headers or via memory leaks mailing-list
- 52024 third-party-advisory
- http://www.squid-cache.org/Versions/v3/3.2/changesets/squid-3.2-11714.patch
- http://www.squid-cache.org/Advisories/SQUID-2012_1.txt
- https://bugzilla.redhat.com/show_bug.cgi?id=887962
- 54839 third-party-advisory
- SUSE-SU-2016:2089 vendor-advisory
- openSUSE-SU-2013:0162 vendor-advisory
- https://bugs.gentoo.org/show_bug.cgi?id=447596
- openSUSE-SU-2013:0186 vendor-advisory
- https://wiki.mageia.org/en/Support/Advisories/MGASA-2012-0368
- openSUSE-SU-2013:1436 vendor-advisory
- USN-1713-1 vendor-advisory