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Ubuntu: 6087-1 Moderate: Ruby Denial Of Service Threats

ubuntu
Calendar Grey May 18, 2023
Dist Ubuntu Esm H88
Important notification regarding Ruby for Ubuntu addressing multiple vulnerabilities. Updates are required for versions 2.3, 2.5, and 2.7.
Several security issues were fixed in Ruby.

Summary

Several security issues were fixed in Ruby.

Software Description:

- 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.

(CVE-2023-28755)

It was discovered that Ruby incorrectly handled certain regular expressions.

An attacker could possily use this issue to cause a denial of service.

This issue only affected Ubuntu 16.04 ESM. (CVE-2023-28756)

Topics%20covered

Topics Covered

security advisory denial of service security issue software update update instructions ubuntu ruby

Update Instructions

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

Ubuntu 20.04 LTS:
  libruby2.7                      2.7.0-5ubuntu1.11
  ruby2.7                         2.7.0-5ubuntu1.11

Ubuntu 18.04 LTS:
  libruby2.5                      2.5.1-1ubuntu1.16
  ruby2.5                         2.5.1-1ubuntu1.16

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
  libruby2.3                      2.3.1-2~ubuntu16.04.16+esm7
  ruby2.3                         2.3.1-2~ubuntu16.04.16+esm7

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

References

https://ubuntu.com/security/notices/USN-6087-1

CVE-2023-28755, CVE-2023-28756

May 18, 2023

Topics%20covered

Topics Covered

security advisory denial of service security issue software update update instructions ubuntu ruby

Package Information

https://launchpad.net/ubuntu/+source/ruby2.7/2.7.0-5ubuntu1.11
https://launchpad.net/ubuntu/+source/ruby2.5/2.5.1-1ubuntu1.16

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