Vulnerability identifier: #VU64542

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2013-4286

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apache Tomcat
Server applications / Web servers

Vendor: Apache Foundation

Description

The vulnerability allows a remote attacker to perform a request-smuggling attack.

The vulnerability exists due to HTTP connector or AJP connector is used, does not properly handle certain inconsistent HTTP request headers. A remote attacker can trigger incorrect identification of a request's length and conduct request-smuggling attacks via multiple Content-Length headers or a Content-Length header and a "Transfer-Encoding: chunked" header.

This vulnerability exists because of an incomplete fix for CVE-2005-2090.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apache Tomcat: 6.0.0 - 6.0.38, 7.0.0 - 7.0.46, 8.0.0

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External links
http://advisories.mageia.org/MGASA-2014-0148.html
http://marc.info/?l=bugtraq&m=141390017113542&w=2
http://marc.info/?l=bugtraq&m=144498216801440&w=2
http://rhn.redhat.com/errata/RHSA-2014-0343.html
http://rhn.redhat.com/errata/RHSA-2014-0344.html
http://rhn.redhat.com/errata/RHSA-2014-0345.html
http://seclists.org/fulldisclosure/2014/Dec/23
http://secunia.com/advisories/57675
http://secunia.com/advisories/59036
http://secunia.com/advisories/59675
http://secunia.com/advisories/59722
http://secunia.com/advisories/59724
http://secunia.com/advisories/59733
http://secunia.com/advisories/59873
http://svn.apache.org/viewvc?view=revision&revision=1521829
http://svn.apache.org/viewvc?view=revision&revision=1521854
http://svn.apache.org/viewvc?view=revision&revision=1552565
http://tomcat.apache.org/security-6.html
http://tomcat.apache.org/security-7.html
http://tomcat.apache.org/security-8.html
http://www.debian.org/security/2016/dsa-3530
http://www.mandriva.com/security/advisories?name=MDVSA-2015:052
http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
http://www.oracle.com/technetwork/topics/security/cpuapr2015-2365600.html
http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
http://www.oracle.com/technetwork/topics/security/cpujul2014-1972956.html
http://www.oracle.com/technetwork/topics/security/cpuoct2014-1972960.html
http://www.securityfocus.com/archive/1/534161/100/0/threaded
http://www.securityfocus.com/bid/65773
http://www.ubuntu.com/usn/USN-2130-1
http://www.vmware.com/security/advisories/VMSA-2014-0012.html
http://www-01.ibm.com/support/docview.wss?uid=swg21667883
http://www-01.ibm.com/support/docview.wss?uid=swg21675886
http://www-01.ibm.com/support/docview.wss?uid=swg21677147
http://www-01.ibm.com/support/docview.wss?uid=swg21678113
http://www-01.ibm.com/support/docview.wss?uid=swg21678231
http://bugzilla.redhat.com/show_bug.cgi?id=1069921
http://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04851013
http://lists.apache.org/thread.html/37220405a377c0182d2afdbc36461c4783b2930fbeae3a17f1333113@%3Cdev.tomcat.apache.org%3E
http://lists.apache.org/thread.html/39ae1f0bd5867c15755a6f959b271ade1aea04ccdc3b2e639dcd903b@%3Cdev.tomcat.apache.org%3E
http://lists.apache.org/thread.html/b84ad1258a89de5c9c853c7f2d3ad77e5b8b2930be9e132d5cef6b95@%3Cdev.tomcat.apache.org%3E
http://lists.apache.org/thread.html/b8a1bf18155b552dcf9a928ba808cbadad84c236d85eab3033662cfb@%3Cdev.tomcat.apache.org%3E
http://lists.apache.org/thread.html/r03c597a64de790ba42c167efacfa23300c3d6c9fe589ab87fe02859c@%3Cdev.tomcat.apache.org%3E
http://lists.apache.org/thread.html/r587e50b86c1a96ee301f751d50294072d142fd6dc08a8987ae9f3a9b@%3Cdev.tomcat.apache.org%3E
http://rhn.redhat.com/errata/RHSA-2014-0686.html

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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.