USN-2397-1: Ruby vulnerabilities

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)

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

• 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

• 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.

References

• CVE-2014-4975
• CVE-2014-8080