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Date: Mon, 12 Oct 2020 11:03:11 +0100
From: Mark Thomas <markt@...che.org>
To: oss-security@...ts.openwall.com
Subject: [SECURITY] CVE-2020-13943 Apache Tomcat HTTP/2 Request mix-up
CVE-2020-13943 Apache Tomcat HTTP/2 Request mix-up
Severity: Moderate
Vendor: The Apache Software Foundation
Versions Affected:
Apache Tomcat 10.0.0-M1 to 10.0.0-M7
Apache Tomcat 9.0.0.M5 to 9.0.37
Apache Tomcat 8.5.1 to 8.5.57
Description:
If an HTTP/2 client exceeded the agreed maximum number of concurrent
streams for a connection (in violation of the HTTP/2 protocol), it was
possible that a subsequent request made on that connection could contain
HTTP headers - including HTTP/2 pseudo headers - from a previous request
rather than the intended headers. This could lead to users seeing
responses for unexpected resources.
Mitigation:
- Upgrade to Apache Tomcat 10.0.0-M8 or later
- Upgrade to Apache Tomcat 9.0.38 or later
- Upgrade to Apache Tomcat 8.5.58 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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