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Apache Tomcat 6.x / 7.x Denial Of Service

Apache Tomcat 6.x / 7.x Denial Of Service
Posted Dec 5, 2012
Authored by Mark Thomas, Arun Neelicattu | Site tomcat.apache.org

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. Tomcat versions 6.0.0 through 6.0.35 and 7.0.0 through 7.0.27 are affected.

tags | advisory, web, denial of service
advisories | CVE-2012-4534
MD5 | 58d5c732c6df7f4ea03d9e2de1eecee2

Apache Tomcat 6.x / 7.x Denial Of Service

Change Mirror Download
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


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