Ubuntu 14.10: USN-2397-1 Critical: Ruby Denial Of Service

ubuntu

November 4, 2014

Several security issues were fixed in Ruby.

Summary

Several security issues were fixed in Ruby.

Software Description:

- ruby2.0: Object-oriented scripting language

- ruby2.1: Object-oriented scripting language

- ruby1.9.1: Object-oriented scripting language

- ruby1.8: Object-oriented scripting language

Details:

Will Wood discovered that Ruby incorrectly handled the encodes() function.

An attacker could possibly use this issue to cause Ruby to crash, resulting

in a denial of service, or possibly execute arbitrary code. The default

compiler options for affected releases should reduce the vulnerability to a

denial of service. (CVE-2014-4975)

Willis Vandevanter discovered that Ruby incorrectly handled XML entity

expansion. An attacker could use this flaw to cause Ruby to consume large

amounts of resources, resulting in a denial of service. (CVE-2014-8080)

Topics Covered

security advisory denial of service critical update instructions ubuntu ruby

Update Instructions

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

Ubuntu 14.10:
  libruby2.0                      2.0.0.484+really457-3ubuntu1.1
  libruby2.1                      2.1.2-2ubuntu1.1
  ruby2.0                         2.0.0.484+really457-3ubuntu1.1
  ruby2.1                         2.1.2-2ubuntu1.1

Ubuntu 14.04 LTS:
  libruby1.9.1                    1.9.3.484-2ubuntu1.1
  libruby2.0                      2.0.0.484-1ubuntu2.1
  ruby1.9.1                       1.9.3.484-2ubuntu1.1
  ruby2.0                         2.0.0.484-1ubuntu2.1

Ubuntu 12.04 LTS:
  libruby1.8                      1.8.7.352-2ubuntu1.5
  libruby1.9.1                    1.9.3.0-1ubuntu2.9
  ruby1.8                         1.8.7.352-2ubuntu1.5
  ruby1.9.1                       1.9.3.0-1ubuntu2.9

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