Vulnerability identifier: #VU64541

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-2013-2067

CWE-ID: CWE-287

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 bypass authentication process.

The vulnerability exists due to java/org/apache/catalina/authenticator/FormAuthenticator.java in the form authentication feature in Apache Tomcat does not properly handle the relationships between authentication requirements and sessions. A remote attacker can inject a request into a session by sending this request during completion of the login form, a variant of a session fixation attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apache Tomcat: 6.0.3 - 6.0.36, 7.0.0 - 7.0.32

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External links
http://archives.neohapsis.com/archives/bugtraq/2013-05/0041.html
http://rhn.redhat.com/errata/RHSA-2013-0833.html
http://rhn.redhat.com/errata/RHSA-2013-0834.html
http://rhn.redhat.com/errata/RHSA-2013-0839.html
http://rhn.redhat.com/errata/RHSA-2013-0964.html
http://rhn.redhat.com/errata/RHSA-2013-1437.html
http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/java/org/apache/catalina/authenticator/FormAuthenticator.java?r1=1417891&r2=1417890&pathrev=1417891
http://svn.apache.org/viewvc/tomcat/tc7.0.x/trunk/java/org/apache/catalina/authenticator/FormAuthenticator.java?r1=1408044&r2=1408043&pathrev=1408044
http://svn.apache.org/viewvc?view=revision&revision=1408044
http://svn.apache.org/viewvc?view=revision&revision=1417891
http://tomcat.apache.org/security-6.html
http://tomcat.apache.org/security-7.html
http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
http://www.oracle.com/technetwork/topics/security/cpujan2014-1972949.html
http://www.securityfocus.com/bid/59799
http://www.securityfocus.com/bid/64758
http://www.ubuntu.com/usn/USN-1841-1
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

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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.