HTTP Request Smuggling Affecting tomcat9 package, versions <9.0.43-2~deb11u1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
10.89% (96th percentile)

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  • Snyk IDSNYK-DEBIAN11-TOMCAT9-1316671
  • published13 Jul 2021
  • disclosed12 Jul 2021

Introduced: 12 Jul 2021

CVE-2021-33037  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade Debian:11 tomcat9 to version 9.0.43-2~deb11u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tomcat9 package and not the tomcat9 package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

Apache Tomcat 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46 and 8.5.0 to 8.5.66 did not correctly parse the HTTP transfer-encoding request header in some circumstances leading to the possibility to request smuggling when used with a reverse proxy. Specifically: - Tomcat incorrectly ignored the transfer encoding header if the client declared it would only accept an HTTP/1.0 response; - Tomcat honoured the identify encoding; and - Tomcat did not ensure that, if present, the chunked encoding was the final encoding.

References

CVSS Scores

version 3.1