[USN-7734-1] Ruby vulnerabilities

[noreply+usn-bot at canonical.com]

==========================================================================
Ubuntu Security Notice USN-7734-1
September 03, 2025

ruby2.5, ruby2.7, ruby3.0, ruby3.2, ruby3.3 vulnerabilities
==========================================================================

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

- Ubuntu 25.04
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in Ruby.

Software Description:
- ruby3.3: Object-oriented scripting language
- ruby3.2: Object-oriented scripting language
- ruby3.0: Object-oriented scripting language
- ruby2.7: Object-oriented scripting language
- ruby2.5: Object-oriented scripting language

Details:

It was discovered that Ruby incorrectly handled certain IO stream
methods. A remote attacker could use this issue to cause Ruby to crash,
resulting in a denial of service, or possibly obtain sensitive
information. This issue only affected Ubuntu 18.04 LTS. (CVE-2024-27280)

It was discovered that the Ruby regex compiler incorrectly handled
certain memory operations. A remote attacker could possibly use this
issue to obtain sensitive memory contents. This issue only affected
Ubuntu 18.04 LTS. (CVE-2024-27282)

It was discovered that Ruby incorrectly handled parsing of certain XML
characters through the REXML gem. An attacker could use this issue to
cause Ruby to crash, resulting in a denial of service. This issue only
affected Ubuntu 18.04 LTS. (CVE-2024-35176)

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

Update instructions:

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

Ubuntu 25.04
  libruby3.3                      3.3.7-1ubuntu2.1
  ruby3.3                         3.3.7-1ubuntu2.1

Ubuntu 24.04 LTS
  libruby3.2                      3.2.3-1ubuntu0.24.04.6
  ruby3.2                         3.2.3-1ubuntu0.24.04.6

Ubuntu 22.04 LTS
  libruby3.0                      3.0.2-7ubuntu2.11
  ruby3.0                         3.0.2-7ubuntu2.11

Ubuntu 20.04 LTS
  libruby2.7                      2.7.0-5ubuntu1.18+esm1
                                  Available with Ubuntu Pro
  ruby2.7                         2.7.0-5ubuntu1.18+esm1
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  libruby2.5                      2.5.1-1ubuntu1.16+esm5
                                  Available with Ubuntu Pro
  ruby2.5                         2.5.1-1ubuntu1.16+esm5
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-7734-1
  CVE-2024-27280, CVE-2024-27282, CVE-2024-35176, CVE-2025-24294

Package Information:
  https://launchpad.net/ubuntu/+source/ruby3.3/3.3.7-1ubuntu2.1
  https://launchpad.net/ubuntu/+source/ruby3.2/3.2.3-1ubuntu0.24.04.6
  https://launchpad.net/ubuntu/+source/ruby3.0/3.0.2-7ubuntu2.11
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