[USN-7735-1] RubyGems vulnerabilities

[noreply+usn-bot at canonical.com]

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

rubygems vulnerabilities
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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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