Input validation error in Squid-cache Squid

1) Input validation error

EUVDB-ID: #VU43246

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2012-5643

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Squid: 2.0 - 3.3.0.1

External links

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html
http://lists.opensuse.org/opensuse-updates/2013-01/msg00052.html
http://lists.opensuse.org/opensuse-updates/2013-01/msg00075.html
http://lists.opensuse.org/opensuse-updates/2013-09/msg00025.html
http://lists.opensuse.org/opensuse-updates/2013-09/msg00032.html
http://openwall.com/lists/oss-security/2012/12/17/4
http://rhn.redhat.com/errata/RHSA-2013-0505.html
http://secunia.com/advisories/52024
http://secunia.com/advisories/54839
http://ubuntu.com/usn/usn-1713-1
http://www.debian.org/security/2013/dsa-2631
http://www.mandriva.com/security/advisories?name=MDVSA-2013:129
http://www.securitytracker.com/id?1027890
http://www.squid-cache.org/Advisories/SQUID-2012_1.txt
http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10479.patch
http://www.squid-cache.org/Versions/v3/3.2/changesets/squid-3.2-11714.patch
http://bugs.gentoo.org/show_bug.cgi?id=447596
http://bugzilla.redhat.com/show_bug.cgi?id=887962
http://wiki.mageia.org/en/Support/Advisories/MGASA-2012-0368

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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