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USN-5235-1: Ruby vulnerabilities

18 January 2022

Several security issues were fixed in Ruby.

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Releases

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 HTML files.
An attacker could possibly use this issue to cause a crash. This
issue only affected Ubuntu 20.04 LTS, Ubuntu 21.04, and Ubuntu 21.10.
(CVE-2021-41816)

It was discovered that Ruby incorrectly handled certain regular expressions.
An attacker could possibly use this issue to cause a regular expression
denial of service. (CVE-2021-41817)

It was discovered that Ruby incorrectly handled certain cookie names.
An attacker could possibly use this issue to access or expose
sensitive information. (CVE-2021-41819)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 21.10
Ubuntu 21.04
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04

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