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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.
WhiteSource Note: After conducting further research, WhiteSource has determined that all versions of netty up to version 4.1.71.Final are vulnerable to CVE-2021-43797.
CVE-2021-43797 - Medium Severity Vulnerability
Vulnerable Library - netty-codec-http-4.1.65.Final.jar
Library home page: https://netty.io/
Path to dependency file: /service/pom.xml
Path to vulnerable library: /home/wss-scanner/.m2/repository/io/netty/netty-codec-http/4.1.65.Final/netty-codec-http-4.1.65.Final.jar
Dependency Hierarchy:
Found in HEAD commit: e06450ec74120f14841ee9ab6e6bb6c0ba83b92e
Found in base branch: master
Vulnerability Details
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.
WhiteSource Note: After conducting further research, WhiteSource has determined that all versions of netty up to version 4.1.71.Final are vulnerable to CVE-2021-43797.
Publish Date: 2021-12-09
URL: CVE-2021-43797
CVSS 3 Score Details (6.5)
Base Score Metrics:
Suggested Fix
Type: Upgrade version
Origin: CVE-2021-43797
Release Date: 2021-12-09
Fix Resolution (io.netty:netty-codec-http): 4.1.71.Final
Direct dependency fix Resolution (software.amazon.awssdk:s3): 2.16.67
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