HTTP Request Smuggling Affecting tomcat7-lib package, versions <0:7.0.100-1.36.amzn1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.34% (73rd percentile)

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  • Snyk IDSNYK-AMZN201803-TOMCAT7LIB-1722665
  • published27 Sept 2021
  • disclosed24 Feb 2020

Introduced: 24 Feb 2020

CVE-2019-17569  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 tomcat7-lib to version 0:7.0.100-1.36.amzn1 or higher.
This issue was patched in ALAS-2020-1352.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tomcat7-lib package and not the tomcat7-lib package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

The refactoring present in Apache Tomcat 9.0.28 to 9.0.30, 8.5.48 to 8.5.50 and 7.0.98 to 7.0.99 introduced a regression. The result of the regression was that invalid Transfer-Encoding headers were incorrectly processed leading to a possibility of HTTP Request Smuggling if Tomcat was located behind a reverse proxy that incorrectly handled the invalid Transfer-Encoding header in a particular manner. Such a reverse proxy is considered unlikely.

CVSS Scores

version 3.1