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USN-4922-1: Ruby vulnerability

20 April 2021

Ruby incorrectly handled XML documents.

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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

Juho Nurminen discovered that the REXML gem bundled with Ruby incorrectly
parsed and serialized XML documents. A remote attacker could possibly use
this issue to perform an XML round-trip attack.

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 20.10
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04

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

References

Related notices

  • USN-4922-2: ruby2.7, ruby2.7-doc, libruby2.7, ruby2.7-dev