USN-195-1: Ruby vulnerability

10 October 2005

ruby1.8 vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 5.04
  • Ubuntu 4.10

Software Description


The object oriented scripting language Ruby supports safely executing untrusted code with two mechanisms: safe level and taint flag on objects. Dr. Yutaka Oiwa discovered a vulnerability that allows Ruby methods to bypass these mechanisms. In systems which use this feature, this could be exploited to execute Ruby code beyond the restrictions specified in each safe level.

Update instructions

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

Ubuntu 5.04
Ubuntu 4.10

To update your system, please follow these instructions: