Vulnerability identifier: #VU32750

Vulnerability risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2012-2687

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apache HTTP Server
Server applications / Web servers

Vendor: Apache Foundation

Description

Vulnerability allows a remote attacker to perform XSS attacks.

The vulnerability is caused by an input validation error in the make_variant_list function in mod_negotiation.c in the mod_negotiation module in the Apache HTTP Server 2.4.x before 2.4.3, when the MultiViews option is enabled, when processing a crafted filename that is not properly handled during construction of a variant list. Per http://httpd.apache.org/security/vulnerabilities_22.html versions 2.2.x before 2.2.23 are also vulnerable. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in victim's browser in security context of vulnerable website.

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
Update to version 2.4.3.

Vulnerable software versions

Apache HTTP Server: 2.4.0 - 2.4.2

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External links
http://httpd.apache.org/security/vulnerabilities_24.html
http://lists.apple.com/archives/security-announce/2013/Sep/msg00002.html
http://lists.opensuse.org/opensuse-updates/2013-02/msg00009.html
http://lists.opensuse.org/opensuse-updates/2013-02/msg00011.html
http://lists.opensuse.org/opensuse-updates/2013-02/msg00012.html
http://mail-archives.apache.org/mod_mbox/www-announce/201208.mbox/%3C0BFFEA9B-801B-4BAA-9534-56F640268E30@apache.org%3E
http://marc.info/?l=bugtraq&m=136612293908376&w=2
http://rhn.redhat.com/errata/RHSA-2012-1591.html
http://rhn.redhat.com/errata/RHSA-2012-1592.html
http://rhn.redhat.com/errata/RHSA-2012-1594.html
http://rhn.redhat.com/errata/RHSA-2013-0130.html
http://secunia.com/advisories/50894
http://secunia.com/advisories/51607
http://support.apple.com/kb/HT5880
http://www.apache.org/dist/httpd/CHANGES_2.4.3
http://www.fujitsu.com/global/support/software/security/products-f/interstage-201303e.html
http://www.oracle.com/technetwork/topics/security/cpujuly2013-1899826.html
http://www.securityfocus.com/bid/55131
http://www.ubuntu.com/usn/USN-1627-1
http://www.xerox.com/download/security/security-bulletin/16287-4d6b7b0c81f7b/cert_XRX13-003_v1.0.pdf
http://www-01.ibm.com/support/docview.wss?uid=nas2a2b50a0ca011b37c86257a96003c9a4f
http://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba@%3Ccvs.httpd.apache.org%3E
http://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830@%3Ccvs.httpd.apache.org%3E
http://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f@%3Ccvs.httpd.apache.org%3E
http://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53@%3Ccvs.httpd.apache.org%3E
http://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7@%3Ccvs.httpd.apache.org%3E
http://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f@%3Ccvs.httpd.apache.org%3E
http://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234@%3Ccvs.httpd.apache.org%3E
http://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b@%3Ccvs.httpd.apache.org%3E
http://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18832
http://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19539

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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.