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Ubuntu Security Notice USN-6219-1

Ubuntu Security Notice USN-6219-1
Posted Jul 17, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6219-1 - It was discovered that Ruby incorrectly handled certain regular expressions. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 20.10 and Ubuntu 20.04 LTS. It was discovered that Ruby incorrectly handled certain regular expressions. An attacker could possibly use this issue to cause a denial of service. This issue exists because of an incomplete fix for CVE-2023-28755.

tags | advisory, denial of service, ruby
systems | linux, ubuntu
advisories | CVE-2023-28755, CVE-2023-36617
SHA-256 | 00959ed34366bcee4d18cd76de6ced7a9e2b44c45aaa6377bd02caaa7877b79e

Ubuntu Security Notice USN-6219-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-6219-1
July 12, 2023

ruby2.3, ruby2.5, ruby2.7, ruby3.0, ruby3.1 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.04
- Ubuntu 22.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)

Summary:

Several security issues were fixed in Ruby.

Software Description:
- ruby3.1: Interpreter of object-oriented scripting language Ruby
- ruby3.0: Interpreter of object-oriented scripting language Ruby
- ruby2.7: Object-oriented scripting language
- ruby2.5: Object-oriented scripting language
- ruby2.3: Object-oriented scripting language

Details:

It was discovered that Ruby incorrectly handled certain regular expressions.
An attacker could possibly use this issue to cause a denial of service.
This issue only affected Ubuntu 20.10 and Ubuntu 20.04 LTS.
(CVE-2023-28755)

It was discovered that Ruby incorrectly handled certain regular expressions.
An attacker could possibly use this issue to cause a denial of service.
This issue exists because of an incomplete fix for CVE-2023-28755.
(CVE-2023-36617)

Update instructions:

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

Ubuntu 23.04:
libruby3.1 3.1.2-6ubuntu0.23.04.2
ruby3.1 3.1.2-6ubuntu0.23.04.2

Ubuntu 22.10:
libruby3.0 3.0.4-7ubuntu0.2
ruby3.0 3.0.4-7ubuntu0.2

Ubuntu 22.04 LTS:
libruby3.0 3.0.2-7ubuntu2.4
ruby3.0 3.0.2-7ubuntu2.4

Ubuntu 20.04 LTS:
libruby2.7 2.7.0-5ubuntu1.12
ruby2.7 2.7.0-5ubuntu1.12

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
libruby2.5 2.5.1-1ubuntu1.16+esm1
ruby2.5 2.5.1-1ubuntu1.16+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
libruby2.3 2.3.1-2~ubuntu16.04.16+esm8
ruby2.3 2.3.1-2~ubuntu16.04.16+esm8

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

References:
https://ubuntu.com/security/notices/USN-6219-1
CVE-2023-28755, CVE-2023-36617

Package Information:
https://launchpad.net/ubuntu/+source/ruby3.1/3.1.2-6ubuntu0.23.04.2
https://launchpad.net/ubuntu/+source/ruby3.0/3.0.4-7ubuntu0.2
https://launchpad.net/ubuntu/+source/ruby3.0/3.0.2-7ubuntu2.4
https://launchpad.net/ubuntu/+source/ruby2.7/2.7.0-5ubuntu1.12

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