HTTP Request Smuggling Affecting netty3 package, versions <3.10.6-150200.3.3.2


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.21% (59th percentile)

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  • Snyk IDSNYK-SLES154-NETTY3-2869559
  • published14 Jun 2022
  • disclosed13 Jun 2022

Introduced: 13 Jun 2022

CVE-2021-43797  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade SLES:15.4 netty3 to version 3.10.6-150200.3.3.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream netty3 package and not the netty3 package as distributed by SLES. See How to fix? for SLES:15.4 relevant fixed versions and status.

Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. Netty prior to version 4.1.71.Final skips control chars when they are present at the beginning / end of the header name. It should instead fail fast as these are not allowed by the spec and could lead to HTTP request smuggling. Failing to do the validation might cause netty to "sanitize" header names before it forward these to another remote system when used as proxy. This remote system can't see the invalid usage anymore, and therefore does not do the validation itself. Users should upgrade to version 4.1.71.Final.

CVSS Scores

version 3.1