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