Information Exposure Affecting jws5-tomcat package, versions <0:9.0.36-9.redhat_8.1.el8jws


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.26% (65th percentile)

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  • Snyk IDSNYK-RHEL8-JWS5TOMCAT-4405177
  • published26 Jul 2021
  • disclosed3 Dec 2020

Introduced: 3 Dec 2020

CVE-2020-17527  (opens in a new tab)
CWE-200  (opens in a new tab)

How to fix?

Upgrade RHEL:8 jws5-tomcat to version 0:9.0.36-9.redhat_8.1.el8jws or higher.
This issue was patched in RHSA-2021:0494.

NVD Description

Note: Versions mentioned in the description apply only to the upstream jws5-tomcat package and not the jws5-tomcat package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

While investigating bug 64830 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.

References

CVSS Scores

version 3.1