Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers
[<prev] [next>] [day] [month] [year] [list]
Date: Mon, 10 Apr 2017 20:14:37 +0100
From: Mark Thomas <markt@...che.org>
To: oss-security@...ts.openwall.com
Subject: [SECURITY] CVE-2017-5650 Apache Tomcat Denial of Service

CVE-2017-5650 Apache Tomcat Denial of Service

Severity: Important

Vendor: The Apache Software Foundation

Versions Affected:
Apache Tomcat 9.0.0.M1 to 9.0.0.M18
Apache Tomcat 8.5.0 to 8.5.12
Apache Tomcat 8.0.x and earlier are not affected

Description
The handling of an HTTP/2 GOAWAY frame for a connection did not close
streams associated with that connection that were currently waiting for
a WINDOW_UPDATE before allowing the application to write more data.
These waiting streams each consumed a thread. A malicious client could
therefore construct a series of HTTP/2 requests that would consume all
available processing threads.

Mitigation:
Users of the affected versions should apply one of the following
mitigations:
- Upgrade to Apache Tomcat 9.0.0.M19 or later
- Upgrade to Apache Tomcat 8.5.13 or later

Credit:
This issue was identified by Chun Han Hsiao and reported responsibly to
the Tomcat security team.

History:
2017-04-10 Original advisory

References:
[1] http://tomcat.apache.org/security-9.html
[2] http://tomcat.apache.org/security-8.html

Powered by blists - more mailing lists

Your e-mail address:

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.