Vulnerability identifier: #VU44754

Vulnerability risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2011-3205

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Squid
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Squid-cache.org

Description

The vulnerability allows remote Gopher servers to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (memory corruption and daemon restart) or possibly have unspecified other impact via a long line in a response.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Squid: 3.0.stable1 - 3.2.0.10

---

External links
http://lists.fedoraproject.org/pipermail/package-announce/2011-September/065534.html
http://lists.opensuse.org/opensuse-security-announce/2011-09/msg00012.html
http://lists.opensuse.org/opensuse-security-announce/2011-09/msg00013.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html
http://openwall.com/lists/oss-security/2011/08/29/2
http://openwall.com/lists/oss-security/2011/08/30/4
http://openwall.com/lists/oss-security/2011/08/30/8
http://secunia.com/advisories/45805
http://secunia.com/advisories/45906
http://secunia.com/advisories/45920
http://secunia.com/advisories/45965
http://secunia.com/advisories/46029
http://securitytracker.com/id?1025981
http://www.debian.org/security/2011/dsa-2304
http://www.mandriva.com/security/advisories?name=MDVSA-2011:150
http://www.osvdb.org/74847
http://www.redhat.com/support/errata/RHSA-2011-1293.html
http://www.securityfocus.com/bid/49356
http://www.squid-cache.org/Advisories/SQUID-2011_3.txt
http://www.squid-cache.org/Versions/v2/2.HEAD/changesets/12710.patch
http://www.squid-cache.org/Versions/v3/3.0/changesets/squid-3.0-9193.patch
http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10363.patch
http://www.squid-cache.org/Versions/v3/3.2/changesets/squid-3.2-11294.patch
http://bugzilla.redhat.com/show_bug.cgi?id=734583

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.