Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [day] [month] [year] [list]
Date: Wed, 15 Sep 2021 18:57:33 +0100
From: Mark Thomas <>
Subject: CVE-2021-41079: Apache Tomcat DoS with unexpected TLS packet

Severity: high


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.


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.


Powered by blists - more mailing lists

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.