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Date: Thu, 3 Dec 2020 18:07:07 +0000
From: Mark Thomas <markt@...che.org>
To: oss-security@...ts.openwall.com
Subject: [SECURITY] CVE-2020-17527 Apache Tomcat HTTP/2 Request header mix-up
CVE-2020-17527 Apache Tomcat HTTP/2 Request header mix-up
Severity: Moderate
Vendor: The Apache Software Foundation
Versions Affected:
Apache Tomcat 10.0.0-M1 to 10.0.0-M9
Apache Tomcat 9.0.0.M5 to 9.0.39
Apache Tomcat 8.5.1 to 8.5.59
Description:
While investigating Bug 64830 it was discovered that Apache Tomcat could
re-use an HTTP request header value from the previous stream received
on an HTTP/2 connection for the request associated with the subsequent
stream. While this would most likely lead to an error and the closure of
the HTTP/2 connection, it is possible that information could leak
between requests.
Mitigation:
- Upgrade to Apache Tomcat 10.0.0-M10 or later
- Upgrade to Apache Tomcat 9.0.40 or later
- Upgrade to Apache Tomcat 8.5.60 or later
Credit:
This issue was identified by the Apache Tomcat Security Team.
References:
[1] http://tomcat.apache.org/security-10.html
[2] http://tomcat.apache.org/security-9.html
[3] http://tomcat.apache.org/security-8.html
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