PT-2020-15032 · Apache+4 · Apache Tomcat+4
Published
2020-11-17
·
Updated
2026-03-26
·
CVE-2020-17527
CVSS v3.1
7.5
High
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Name of the Vulnerable Software and Affected Versions
Apache Tomcat versions 10.0.0-M1 through 10.0.0-M9
Apache Tomcat versions 9.0.0-M1 through 9.0.39
Apache Tomcat versions 8.5.0 through 8.5.59
Description
The issue allows Apache Tomcat to 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. This could most likely lead to an error and the closure of the HTTP/2 connection, but it is also possible that information could leak between requests.
Recommendations
For Apache Tomcat versions 10.0.0-M1 through 10.0.0-M9, update to a version that contains a fix for this issue.
For Apache Tomcat versions 9.0.0-M1 through 9.0.39, update to a version that contains a fix for this issue.
For Apache Tomcat versions 8.5.0 through 8.5.59, update to a version that contains a fix for this issue.
As a temporary workaround, consider restricting the use of HTTP/2 connections until a patch is available.
Exploit
Fix
Information Disclosure
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Apache Tomcat
Linuxmint
Suse
Ubuntu