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                             CERT-Renater

                 Note d'Information No. 2020/VULN652
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DATE                : 04/12/2020

HARDWARE PLATFORM(S): /

OPERATING SYSTEM(S): Systems running Apache Tomcat versions prior to
                             10.0.0-M10, 9.0.40, 8.5.60.

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http://mail-archives.apache.org/mod_mbox/tomcat-announce/202012.mbox/%3c52858194-2efd-6f17-1821-9036c8494df0@apache.org%3e
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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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+ CERT-RENATER       |    tel : 01-53-94-20-44          +
+ 23/25 Rue Daviel   |    fax : 01-53-94-20-41          +
+ 75013 Paris        |    email:cert@support.renater.fr +
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