Ubuntu 12.04 LTS / 14.04 LTS / 14.10 : ruby1.8, ruby1.9.1, ruby2.0, ruby2.1 vulnerabilities (USN-2397-1)
Medium Nessus Plugin ID 78869
SynopsisThe remote Ubuntu host is missing one or more security-related patches.
DescriptionWill 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.
Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
SolutionUpdate the affected packages.