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[USN-7735-1] RubyGems vulnerabilities

Posted on 04 September 2025
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7735-1
September 03, 2025

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

- Ubuntu 25.04
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in RubyGems.

Software Description:
- rubygems: package management framework for Ruby libraries/applications

Details:

It was discovered that RubyGems incorrectly handled certain regular
expressions. An attacker could use this issue to cause RubyGems to crash,
resulting in a denial of service. This issue only affected Ubuntu 22.04
LTS. (CVE-2023-28755)

It was discovered that RubyGems incorrectly handled decompressed domain
names within a DNS packet. An attacker could use this issue to cause
RubyGems to crash, resulting in a denial of service. This issue only
affected Ubuntu 25.04. (CVE-2025-24294)

Update instructions:

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

Ubuntu 25.04
ruby-rubygems 3.6.3-1ubuntu0.1

Ubuntu 22.04 LTS
ruby-rubygems 3.3.5-2ubuntu1.1

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

References:
https://ubuntu.com/security/notices/USN-7735-1
CVE-2023-28755, CVE-2025-24294

Package Information:
https://launchpad.net/ubuntu/+source/rubygems/3.6.3-1ubuntu0.1
https://launchpad.net/ubuntu/+source/rubygems/3.3.5-2ubuntu1.1

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