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Ubuntu Security Notice USN-5806-2

Ubuntu Security Notice USN-5806-2
Posted Jan 24, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5806-2 - 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. 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.

tags | advisory, web, cgi, vulnerability, ruby
systems | linux, ubuntu
advisories | CVE-2021-33621
SHA-256 | 5e9eaa591a250702e16d36f855a65138db55f846075d60d7208d9a3e346086a8

Ubuntu Security Notice USN-5806-2

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-5806-2
January 23, 2023

ruby2.5, ruby3.0 vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.10
- Ubuntu 22.04 LTS
- Ubuntu 18.04 LTS

Summary:

Ruby could allow for internet traffic to be modified if
a vulnerable application processed malicious user input.

Software Description:
- ruby3.0: Interpreter of object-oriented scripting language Ruby
- ruby2.5: Object-oriented scripting language

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

Ubuntu 22.04 LTS:
libruby3.0 3.0.2-7ubuntu2.3
ruby3.0 3.0.2-7ubuntu2.3

Ubuntu 18.04 LTS:
libruby2.5 2.5.1-1ubuntu1.13
ruby2.5 2.5.1-1ubuntu1.13

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

References:
https://ubuntu.com/security/notices/USN-5806-2
https://ubuntu.com/security/notices/USN-5806-1
CVE-2021-33621

Package Information:
https://launchpad.net/ubuntu/+source/ruby3.0/3.0.4-7ubuntu0.1
https://launchpad.net/ubuntu/+source/ruby3.0/3.0.2-7ubuntu2.3
https://launchpad.net/ubuntu/+source/ruby2.5/2.5.1-1ubuntu1.13
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