Netty is an asynchronous event-driven network application framework for
rapid development of maintainable high performance protocol servers and
clients.
Path to vulnerable library: /epository/io/netty/netty-codec-http/4.1.0.Beta1/netty-codec-http-4.1.0.Beta1.jar,/epository/io/netty/netty-codec-http/4.1.0.Beta1/netty-codec-http-4.1.0.Beta1.jar,/epository/io/netty/netty-codec-http/4.1.0.Beta1/netty-codec-http-4.1.0.Beta1.jar,/epository/io/netty/netty-codec-http/4.1.0.Beta1/netty-codec-http-4.1.0.Beta1.jar
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.
Mend Note: After conducting further research, Mend 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
Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers and clients.
Library home page: http://netty.io/
Path to dependency file: /example/pom.xml
Path to vulnerable library: /epository/io/netty/netty-codec-http/4.1.0.Beta1/netty-codec-http-4.1.0.Beta1.jar,/epository/io/netty/netty-codec-http/4.1.0.Beta1/netty-codec-http-4.1.0.Beta1.jar,/epository/io/netty/netty-codec-http/4.1.0.Beta1/netty-codec-http-4.1.0.Beta1.jar,/epository/io/netty/netty-codec-http/4.1.0.Beta1/netty-codec-http-4.1.0.Beta1.jar
Dependency Hierarchy: - :x: **netty-codec-http-4.1.0.Beta1.jar** (Vulnerable Library)
Found in base branch: master
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. Mend Note: After conducting further research, Mend 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
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: Required - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: None - Integrity Impact: High - Availability Impact: None
For more information on CVSS3 Scores, click here.Type: Upgrade version
Origin: CVE-2021-43797
Release Date: 2021-12-09
Fix Resolution: 4.1.71.Final
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