Vulnerability identifier: #VU43808

Vulnerability risk: Low

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

CVE-ID: CVE-2012-2751

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

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

Vendor: Trustwave

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. The vulnerability allows remote attackers to bypass filtering rules and perform other attacks such as cross-site scripting (XSS) attacks.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation
Install update from vendor's website.

Vulnerable software versions

ModSecurity: 2.0.0 - 2.0.4, 2.1.0 - 2.1.6, 2.5.0 - 2.5.13, 2.6.0 - 2.6.4

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External links
http://blog.ivanristic.com/2012/06/modsecurity-and-modsecurity-core-rule-set-multipart-bypasses.html
http://lists.opensuse.org/opensuse-updates/2013-08/msg00020.html
http://lists.opensuse.org/opensuse-updates/2013-08/msg00025.html
http://lists.opensuse.org/opensuse-updates/2013-08/msg00031.html
http://mod-security.svn.sourceforge.net/viewvc/mod-security/m2/branches/2.6.x/CHANGES
http://mod-security.svn.sourceforge.net/viewvc/mod-security/m2/trunk/apache2/msc_multipart.c?r1=1918&r2=1917&pathrev=1918
http://mod-security.svn.sourceforge.net/viewvc/mod-security/m2/trunk/CHANGES?r1=1920&r2=1919&pathrev=1920
http://secunia.com/advisories/49576
http://secunia.com/advisories/49782
http://www.debian.org/security/2012/dsa-2506
http://www.mandriva.com/security/advisories?name=MDVSA-2012:118
http://www.mandriva.com/security/advisories?name=MDVSA-2013:150
http://www.openwall.com/lists/oss-security/2012/06/22/1
http://www.openwall.com/lists/oss-security/2012/06/22/2
http://www.oracle.com/technetwork/topics/security/cpuapr2013-1899555.html
http://www.securityfocus.com/bid/54156

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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.