Description
The string-comparison functions in String.cci in Squid 3.x before 3.1.8 and 3.2.x before 3.2.0.2 allow remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted request.
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 5.0 | squid3 | 3.0.STABLE8-3+lenny4 | DSA-2111-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | squid | 7:3.1.10-1.el6 | RHSA-2011:0545 |
Advisories 2
- RHSA-2011:0545 Red Hat Security Advisory: squid security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-2111-1 squid3 - denial of service Debian Security (DSA / DLA) · Mar 9, 2026
References
- FEDORA-2010-14236 vendor-advisory
- [oss-security] 20100905 CVE Request -- Squid -- Denial of service due internal error in string handling (SQUID-2010:3) mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=630444
- FEDORA-2010-14222 vendor-advisory
- 41298 third-party-advisory
- ADV-2010-2433 vdb-entry
- http://www.squid-cache.org/Advisories/SQUID-2010_3.txt
- http://www.squid-cache.org/Versions/v3/3.0/changesets/squid-3.0-9189.patch
- 41477 third-party-advisory
- DSA-2111 vendor-advisory
- 42982 vdb-entry
- http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10090.patch
- 41534 third-party-advisory
- SUSE-SR:2010:019 vendor-advisory
- [oss-security] 20100907 Re: CVE Request -- Squid -- Denial of service due internal error in string handling (SQUID-2010:3) mailing-list