bugtraq - CVE-2012-4534 Apache Tomcat denial of service

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Message-ID: <50BE535A.9000600@apache.org>
Date: Tue, 04 Dec 2012 19:47:38 +0000
From: Mark Thomas <markt@...che.org>
To: Tomcat Users List <users@...cat.apache.org>
CC: Tomcat Announce List <announce@...cat.apache.org>, announce@...che.org,
  Tomcat Developers List <dev@...cat.apache.org>, bugtraq@...urityfocus.com,
  full-disclosure@...ts.grok.org.uk
Subject: CVE-2012-4534 Apache Tomcat denial of service

CVE-2012-4534 Apache Tomcat denial of service

Severity: Important

Vendor: The Apache Software Foundation

Versions Affected:
- Tomcat 7.0.0 to 7.0.27
- Tomcat 6.0.0 to 6.0.35

Description:
When using the NIO connector with sendfile and HTTPS enabled, if a
client breaks the connection while reading the response an infinite loop
is entered leading to a denial of service. This was originally reported
as https://issues.apache.org/bugzilla/show_bug.cgi?id=52858.

Mitigation:
Users of affected versions should apply one of the following mitigations:
- Tomcat 7.0.x users should upgrade to 7.0.28 or later
- Tomcat 6.0.x users should upgrade to 6.0.36 or later

Credit:
The security implications of this bug were identified by Arun Neelicattu
of the Red Hat Security Response Team.

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