[ASA-202012-4] tomcat8: information disclosure
Remi Gacogne
rgacogne at archlinux.org
Wed Dec 9 18:51:29 UTC 2020
Arch Linux Security Advisory ASA-202012-4
=========================================
Severity: Medium
Date : 2020-12-05
CVE-ID : CVE-2020-17527
Package : tomcat8
Type : information disclosure
Remote : Yes
Link : https://security.archlinux.org/AVG-1316
Summary
=======
The package tomcat8 before version 8.5.60-1 is vulnerable to
information disclosure.
Resolution
==========
Upgrade to 8.5.60-1.
# pacman -Syu "tomcat8>=8.5.60-1"
The problem has been fixed upstream in version 8.5.60.
Workaround
==========
None.
Description
===========
It was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1
to 9.0.39 and 8.5.0 to 8.5.59 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.
Impact
======
A remote attacker might be able to access sensitive information via
well-timed HTTP/2 requests.
References
==========
https://tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.60
https://github.com/apache/tomcat/commit/21e3408671aac7e0d7e264e720cac8b1b189eb29
https://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.40
https://github.com/apache/tomcat/commit/d56293f816d6dc9e2b47107f208fa9e95db58c65
https://security.archlinux.org/CVE-2020-17527
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