CVE-2021-21409 (Medium) detected in netty-all-4.1.29.Final.jar

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CVE-2021-21409 - Medium Severity Vulnerability

Vulnerable Library - netty-all-4.1.29.Final.jar

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: cruise-control

Path to vulnerable library: /root/.gradle/caches/modules-2/files-2.1/io.netty/netty-all/4.1.29.Final/efce189397bfce0a561b25512696de8d241070b5/netty-all-4.1.29.Final.jar,/root/.gradle/caches/modules-2/files-2.1/io.netty/netty-all/4.1.29.Final/efce189397bfce0a561b25512696de8d241070b5/netty-all-4.1.29.Final.jar

Dependency Hierarchy:

• kafka_2.11-0.11.0.2.jar (Root Library)
  • zkclient-0.10.jar
    • zookeeper-3.5.5.jar
      • ❌ netty-all-4.1.29.Final.jar (Vulnerable Library)

Vulnerability Details

Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In Netty (io.netty:netty-codec-http2) before version 4.1.61.Final there is a vulnerability that enables request smuggling. The content-length header is not correctly validated if the request only uses a single Http2HeaderFrame with the endStream set to to true. This could lead to request smuggling if the request is proxied to a remote peer and translated to HTTP/1.1. This is a followup of GHSA-wm47-8v5p-wjpj/CVE-2021-21295 which did miss to fix this one case. This was fixed as part of 4.1.61.Final.

Publish Date: 2021-03-30

URL: CVE-2021-21409

CVSS 3 Score Details (5.9)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: High
  • Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-f256-j965-7f32

Release Date: 2021-03-30

Fix Resolution: io.netty:netty-codec-http2:4.1.61.Final