An issue was found in all versions of io.netty:netty-all. Host verification in Netty is disabled by default. This can lead to MITM attack in which an attacker can forge valid SSL/TLS certificates for a different hostname in order to intercept traffic that doesn’t intend for him. This is an issue because the certificate is not matched with the host.
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.
Library home page: https://netty.io/
Path to dependency file: /pom.xml
Path to vulnerable library: /home/wss-scanner/.m2/repository/io/netty/netty-all/4.1.61.Final/netty-all-4.1.61.Final.jar
Found in HEAD commit: ed6b351915ad26feb8d87ab03d3c5c4b27d706ca
Vulnerabilities
**In some cases, Remediation PR cannot be created automatically for a vulnerability despite the availability of remediation
Details
WS-2020-0408
### Vulnerable Library - netty-all-4.1.61.Final.jarLibrary home page: https://netty.io/
Path to dependency file: /pom.xml
Path to vulnerable library: /home/wss-scanner/.m2/repository/io/netty/netty-all/4.1.61.Final/netty-all-4.1.61.Final.jar
Dependency Hierarchy: - :x: **netty-all-4.1.61.Final.jar** (Vulnerable Library)
Found in HEAD commit: ed6b351915ad26feb8d87ab03d3c5c4b27d706ca
Found in base branch: main
### Vulnerability DetailsAn issue was found in all versions of io.netty:netty-all. Host verification in Netty is disabled by default. This can lead to MITM attack in which an attacker can forge valid SSL/TLS certificates for a different hostname in order to intercept traffic that doesn’t intend for him. This is an issue because the certificate is not matched with the host.
Publish Date: 2020-06-22
URL: WS-2020-0408
### CVSS 3 Score Details (7.4)Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: High - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: High - Integrity Impact: High - Availability Impact: None
For more information on CVSS3 Scores, click here. ### Suggested FixType: Upgrade version
Origin: https://nvd.nist.gov/vuln/detail/WS-2020-0408
Release Date: 2020-06-22
Fix Resolution: 4.1.69.Final
:rescue_worker_helmet: Automatic Remediation will be attempted for this issue.
CVE-2021-43797
### Vulnerable Library - netty-all-4.1.61.Final.jarLibrary home page: https://netty.io/
Path to dependency file: /pom.xml
Path to vulnerable library: /home/wss-scanner/.m2/repository/io/netty/netty-all/4.1.61.Final/netty-all-4.1.61.Final.jar
Dependency Hierarchy: - :x: **netty-all-4.1.61.Final.jar** (Vulnerable Library)
Found in HEAD commit: ed6b351915ad26feb8d87ab03d3c5c4b27d706ca
Found in base branch: main
### Vulnerability DetailsNetty 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
### CVSS 3 Score Details (6.5)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. ### Suggested FixType: Upgrade version
Origin: CVE-2021-43797
Release Date: 2021-12-09
Fix Resolution: 4.1.71.Final
:rescue_worker_helmet: Automatic Remediation will be attempted for this issue.:rescue_worker_helmet:Automatic Remediation will be attempted for this issue.