Tomcat Single Quote Cookie Processing Bug Lets Remote Users Obtain Session Information
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SecurityTracker Alert ID: 1018556 |
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SecurityTracker URL: http://securitytracker.com/id/1018556
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CVE Reference:
CVE-2007-3382
(Links to External Site)
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Date: Aug 14 2007
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Impact:
Disclosure of system information
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Fix Available: Yes Vendor Confirmed: Yes Exploit Included: Yes
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Version(s): 3.3 to 3.3.2, 4.1.0 to 4.1.36, 5.0.0 to 5.0.30, 5.5.0 to 5.5.24, 6.0.0 to 6.0.13
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Description:
A vulnerability was reported in Tomcat. A remote user can obtain session information.
The software incorrectly interprets a single quote (') character in a cookie value as a delimiter. A remote user may be able to exploit this to hijack sessions.
A demonstration exploit URL is provided:
http://[target]:8080/servlets-examples/servlet/CookieExample?cookiename=BLOCKER&cookievalue=%5C%22A%3D%27%3B+Expires%3DThu%2C+1+Jan+2009+00%3A00%3A01+UTC%3B+Path%3D%2Fservlets-examples%2Fservlet+%3B
Tomasz Kuczynski, Poznan Supercomputing and Networking Center and CERT/CC reported this vulnerability.
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Impact:
A remote user can may be able to hijack sessions.
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Solution:
The vendor has issued a fixed version (6.0.14).
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Vendor URL: tomcat.apache.org/ (Links to External Site)
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Cause:
Access control error
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Underlying OS: Linux (Any), UNIX (Any), Windows (Any)
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Message History:
This archive entry has one or more follow-up message(s) listed below.
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Source Message Contents
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Subject: CVE-2007-3382: Handling of cookies containing a ' character
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
CVE-2007-3382: Handling of cookies containing a ' character
Severity:
Low (Session Hi-jacking)
Vendor:
The Apache Software Foundation
Versions Affected:
6.0.0 to 6.0.13
5.5.0 to 5.5.24
5.0.0 to 5.0.30
4.1.0 to 4.1.36
3.3 to 3.3.2
Description:
Tomcat incorrectly treats a single quote character (') in a cookie
value as a delimiter. In some circumstances this can lead to the
leaking of information such as session ID to an attacker.
Mitigation:
Upgrade to 6.0.14
Credit:
This issue was discovered by Tomasz Kuczynski, Poznan Supercomputing
and Networking Center, who worked with the CERT/CC to report the
vulnerability.
Example:
http://localost:8080/servlets-examples/servlet/CookieExample?cookiename=BLOCKER&cookievalue=%5C%22A%3D%27%3B+Expires%3DThu%2C+1+Jan+2009+00%3A00%3A01+UTC%3B+Path%3D%2Fservlets-examples%2Fservlet+%3B
References:
http://tomcat.apache.org/security.html
Mark Thomas
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