USN-6055-1: Ruby vulnerabilities

Publication date

4 May 2023

Overview

Several security issues were fixed in Ruby.


Packages

  • ruby2.3 - Object-oriented scripting language
  • ruby2.5 - Object-oriented scripting language
  • ruby2.7 - 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.
(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 is being addressed only for Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.
(CVE-2023-28756)

It was discovered that Ruby incorrectly handled certain regular expressions.
An attacker could possibly use this issue to cause a denial of service.
(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 is being addressed only for Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.
(CVE-2023-28756)

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
20.04 focal ruby2.7 –  2.7.0-5ubuntu1.9
libruby2.7 –  2.7.0-5ubuntu1.9
18.04 bionic ruby2.5 –  2.5.1-1ubuntu1.14
libruby2.5 –  2.5.1-1ubuntu1.14
16.04 xenial libruby2.3 –  2.3.1-2~ubuntu16.04.16+esm5  
ruby2.3 –  2.3.1-2~ubuntu16.04.16+esm5  

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