USN-5020-1: Ruby vulnerabilities

Releases

• Ubuntu 21.04
• Ubuntu 20.10
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• ruby2.3 - Object-oriented scripting language
• ruby2.5 - Object-oriented scripting language
• ruby2.7 - Object-oriented scripting language

Details

It was discovered that Ruby incorrectly handled certain inputs.
An attacker could possibly use this issue to execute arbitrary code.
(CVE-2021-31799)

It was discovered that Ruby incorrectly handled certain inputs.
An attacker could possibly use this issue to conduct
port scans and service banner extractions. This issue only affected
Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 20.10, and Ubuntu 21.04. (CVE-2021-31810)

It was discovered that Ruby incorrectly handled certain inputs.
An attacker could possibly use this issue to perform
machine-in-the-middle attackers to bypass the TLS protection.
(CVE-2021-32066)

Update instructions

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

Ubuntu 21.04

• libruby2.7 - 2.7.2-4ubuntu1.2
• ruby2.7 - 2.7.2-4ubuntu1.2

Ubuntu 20.10

• libruby2.7 - 2.7.1-3ubuntu1.4
• ruby2.7 - 2.7.1-3ubuntu1.4

Ubuntu 20.04

• libruby2.7 - 2.7.0-5ubuntu1.5
• ruby2.7 - 2.7.0-5ubuntu1.5

Ubuntu 18.04

• libruby2.5 - 2.5.1-1ubuntu1.10
• ruby2.5 - 2.5.1-1ubuntu1.10

Ubuntu 16.04

• libruby2.3 - 2.3.1-2~ubuntu16.04.16+esm1
  Available with Ubuntu Pro
• ruby2.3 - 2.3.1-2~ubuntu16.04.16+esm1
  Available with Ubuntu Pro

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

References

• CVE-2021-31799
• CVE-2021-32066
• CVE-2021-31810