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USN-1780-1: Ruby vulnerability

25 March 2013

Ruby could be made to hang if it received specially crafted input.



  • ruby1.8 - Object-oriented scripting language
  • ruby1.9.1 - Object-oriented scripting language


Ben Murphy discovered that the Ruby REXML library incorrectly handled XML
entity expansion. An attacker could use this flaw to cause Ruby to consume
large amounts of memory, resulting in a denial of service.

Update instructions

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

Ubuntu 12.10
Ubuntu 12.04
Ubuntu 11.10
Ubuntu 10.04

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