USN-5806-2: Ruby vulnerability

Releases

• Ubuntu 22.10
• Ubuntu 22.04 LTS
• Ubuntu 18.04 ESM

Packages

• ruby2.5 - Object-oriented scripting language
• ruby3.0 - Interpreter of object-oriented scripting language Ruby

Details

USN-5806-1 fixed vulnerabilities in Ruby. This update fixes the problem
for Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.10.

Original advisory details:

Hiroshi Tokumaru discovered that Ruby did not properly handle certain
user input for applications which generate HTTP responses using cgi gem.
An attacker could possibly use this issue to maliciously modify the
response a user would receive from a vulnerable application.

Update instructions

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

Ubuntu 22.10

• ruby3.0 - 3.0.4-7ubuntu0.1
• libruby3.0 - 3.0.4-7ubuntu0.1

Ubuntu 22.04

• ruby3.0 - 3.0.2-7ubuntu2.3
• libruby3.0 - 3.0.2-7ubuntu2.3

Ubuntu 18.04

• ruby2.5 - 2.5.1-1ubuntu1.13
• libruby2.5 - 2.5.1-1ubuntu1.13

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

References

• CVE-2021-33621

Related notices

• USN-5806-1: ruby2.3-tcltk, ruby2.3-doc, ruby2.3, libruby2.3, ruby2.3-dev
• USN-5806-3: ruby2.7, libruby2.7, ruby2.7-dev, ruby2.7-doc
• USN-6181-1: ruby3.1-doc, ruby3.1, ruby3.1-dev, libruby3.1