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List:       oss-security
Subject:    [oss-security] CVE-2021-41079: Apache Tomcat DoS with unexpected TLS packet
From:       Mark Thomas <markt () apache ! org>
Date:       2021-09-15 17:57:33
Message-ID: a144491b-8efb-dff2-cda5-e0d5be744359 () apache ! org
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Severity: high

Description:

Apache Tomcat 8.5.0 to 8.5.63, 9.0.0-M1 to 9.0.43 and 10.0.0-M1 to 
10.0.2 did not properly validate incoming TLS packets. When Tomcat was 
configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially 
crafted packet could be used to trigger an infinite loop resulting in a 
denial of service.

Credit:

The Apache Tomcat security team would like to thank Thomas Wozenilek for 
originally reporting this issue and David Frankson of Infinite Campus 
for also providing a test case that reproduced the issue.

References:

https://lists.apache.org/thread.html/rccdef0349fdf4fb73a4e4403095446d7fe6264e0a58e2df5c6799434%40%3Cannounce.tomcat.apache.org%3E



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