bugtraq - [SECURITY] CVE-2010-2227: Apache Tomcat Remote Denial Of Service and Information Disclosure Vulnerability

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Message-ID: <4C374EC4.4030305@apache.org>
Date: Fri, 09 Jul 2010 17:31:00 +0100
From: Mark Thomas <markt@...che.org>
Cc: Tomcat Users List <users@...cat.apache.org>,
	Tomcat Developers List <dev@...cat.apache.org>, annouce@...che.org,
	announce@...cat.apache.org, full-disclosure@...ts.grok.org.uk,
	bugtraq@...urityfocus.com,
	Apache Tomcate private security list <security@...cat.apache.org>
Subject: [SECURITY] CVE-2010-2227: Apache Tomcat Remote Denial Of Service
 and Information Disclosure Vulnerability

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CVE-2010-2227: Apache Tomcat Remote Denial Of Service and Information
               Disclosure Vulnerability

Severity: Important

Vendor:
The Apache Software Foundation

Versions Affected:
Tomcat 5.5.0 to 5.5.29
Tomcat 6.0.0 to 6.0.27
Tomcat 7.0.0

Note: 7.0.0 is still beta.
Note: The unsupported Tomcat 3.x, 4.x and 5.0.x versions may also be
affected.

Description:
Several flaws in the handling of the 'Transfer-Encoding' header were
found that prevented the recycling of a buffer. A remote attacker could
trigger this flaw which would cause subsequent requests to fail and/or
information to leak between requests.

Mitigation:
- - Tomcat 5.5.x users should upgrade to 5.5.30 or apply this patch:
  http://svn.apache.org/viewvc?view=revision&revision=959428
- - Tomcat 6.0.x users should upgrade to 6.0.28 or apply this patch:
  http://svn.apache.org/viewvc?view=revision&revision=958977
- - Tomcat 7.0.x users should upgrade to 7.0.1 when released or apply this
patch:
  http://svn.apache.org/viewvc?view=revision&revision=958911

- - All users may mitigate this flaw by running Tomcat behind a reverse
proxy (such as Apache httpd 2.2) that rejects invalid values for
Transfer-Encoding.

Credit:
This issue was discovered by Steve Jones

References:
http://tomcat.apache.org/security.html
http://tomcat.apache.org/security-7.html
http://tomcat.apache.org/security-6.html
http://tomcat.apache.org/security-5.html

The Apache Tomcat Security Team
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