HTTP Request Smuggling Affecting tomcat package, versions [,8.5.68)[9.0.0, 9.0.48)[10.0.0, 10.0.7)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
15.54% (96th percentile)

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  • Snyk IDSNYK-UNMANAGED-TOMCAT-2382446
  • published26 Jan 2022
  • disclosed12 Jul 2021
  • creditUnknown

Introduced: 12 Jul 2021

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

How to fix?

Upgrade tomcat to version 8.5.68, 9.0.48, 10.0.7 or higher.

Overview

Affected versions of this package are vulnerable to HTTP Request Smuggling. 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.

CVSS Scores

version 3.1