USN-3553-1: Ruby vulnerabilities

31 January 2018

Several security issues were fixed in Ruby.



  • ruby2.3 - Interpreter of object-oriented scripting language Ruby


It was discovered that Ruby failed to validate specification names.
An attacker could possibly use a maliciously crafted gem to potentially
overwrite any file on the filesystem. (CVE-2017-0901)

It was discovered that Ruby was vulnerable to a DNS hijacking vulnerability.
An attacker could use this to possibly force the RubyGems client to download
and install gems from a server that the attacker controls. (CVE-2017-0902)

It was discovered that Ruby incorrectly handled certain YAML files. An attacker could
use this to possibly execute arbitrary code. (CVE-2017-0903)

Update instructions

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

Ubuntu 17.10
Ubuntu 16.04

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

Related notices

  • USN-3685-1: ruby2.0, ruby2.3, libruby2.0, libruby2.3, ruby1.9.1, libruby1.9.1, ruby1.9.3
  • USN-3439-1: ruby1.9.1, libruby1.9.1, ruby1.9.3
  • USN-3685-2: libruby2.0, ruby2.0