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Ubuntu 20.04 LTS USN-6055-1 Critical Denial Of Service Fix

ubuntu
Calendar Grey May 4, 2023
Dist Ubuntu Esm H88
Vital patches for Ruby security weaknesses in Ubuntu: maintain your systems updated to safeguard against potential denial of service threats.
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 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)

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu vulnerability fix Ruby

Update Instructions

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

Ubuntu 20.04 LTS:
  libruby2.7                      2.7.0-5ubuntu1.9
  ruby2.7                         2.7.0-5ubuntu1.9

Ubuntu 18.04 LTS:
  libruby2.5                      2.5.1-1ubuntu1.14
  ruby2.5                         2.5.1-1ubuntu1.14

Ubuntu 16.04 ESM:
  libruby2.3                      2.3.1-2~ubuntu16.04.16+esm5
  ruby2.3                         2.3.1-2~ubuntu16.04.16+esm5

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

References

https://ubuntu.com/security/notices/USN-6055-1

CVE-2023-28755, CVE-2023-28756

Severity
critical
Lowest
Low
Medium
High
Critical

May 04, 2023

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu vulnerability fix Ruby

Package Information

https://launchpad.net/ubuntu/+source/ruby2.7/2.7.0-5ubuntu1.9
https://launchpad.net/ubuntu/+source/ruby2.5/2.5.1-1ubuntu1.14

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