USN-4532-1: Netty vulnerabilities

Publication date

22 September 2020

Overview

Several security issues were fixed in Netty.

Releases


Packages

  • netty-3.9 - Asynchronous event-driven network application framework

Details

It was discovered that Netty incorrectly handled certain HTTP headers.
By sending an HTTP header with whitespace before the colon, a remote
attacker could possibly use this issue to perform an HTTP request
smuggling attack. (CVE-2019-16869)

It was discovered that Netty incorrectly handled certain HTTP headers.
By sending an HTTP header that lacks a colon, a remote attacker could
possibly use this issue to perform an HTTP request smuggling attack.
(CVE-2019-20444)

It was discovered that Netty incorrectly handled certain HTTP headers.
By sending a Content-Length header accompanied by a second Content-Length
header, or by a Transfer-Encoding header, a remote attacker could possibly
use this issue to perform an HTTP request smuggling attack.
(CVE-2019-20445)

It was discovered that Netty incorrectly handled certain HTTP headers.
By sending an HTTP header with whitespace before the colon, a remote
attacker could possibly use this issue to perform an HTTP request
smuggling attack. (CVE-2019-16869)

It was discovered that Netty incorrectly handled certain HTTP headers.
By sending an HTTP header that lacks a colon, a remote attacker could
possibly use this issue to perform an HTTP request smuggling attack.
(CVE-2019-20444)

It was discovered that Netty incorrectly handled certain HTTP headers.
By sending a Content-Length header accompanied by a second Content-Length
header, or by a Transfer-Encoding header, a remote attacker could possibly
use this issue to perform an HTTP request smuggling attack.
(CVE-2019-20445)

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
18.04 bionic libnetty-3.9-java –  3.9.9.Final-1+deb9u1build0.18.04.1

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