Ubuntu: 1603-2: Ruby vulnerabilities
Posted by Benjamin D. Thomas   
Ubuntu Ruby could allow excessive access in untrusted programs.
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Ubuntu Security Notice USN-1603-2
October 23, 2012

ruby1.8 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.10

Summary:

Ruby could allow excessive access in untrusted programs.

Software Description:
- ruby1.8: Interpreter of object-oriented scripting language Ruby 1.8

Details:

USN-1603-1 fixed vulnerabilities in Ruby. This update provides the
corresponding updates for Ubuntu 12.10.

Original advisory details:

 Shugo Maedo and Vit Ondruch discovered that Ruby incorrectly allowed untainted
 strings to be modified in protective safe levels. An attacker could use this
 flaw to bypass intended access restrictions. (CVE-2012-4466, CVE-2012-4481)

Update instructions:

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

Ubuntu 12.10:
  libruby1.8                      1.8.7.358-4ubuntu0.1

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

References:
  http://www.ubuntu.com/usn/usn-1603-2
  http://www.ubuntu.com/usn/usn-1603-1
  CVE-2012-4466, CVE-2012-4481

Package Information:
  https://launchpad.net/ubuntu/+source/ruby1.8/1.8.7.358-4ubuntu0.1