SynopsisThe remote Debian host is missing a security update.
DescriptionTwo vulnerabilities were identified in the Ruby language interpreter, version 1.9.1.
Jean-Philippe Aumasson identified that Ruby computed hash values without properly restricting the ability to trigger hash collisions predictably, allowing context-dependent attackers to cause a denial of service (CPU consumption). This is a different vulnerability than CVE-2011-4815.
Thomas Hollstegge and Ben Murphy found that the JSON gem for Ruby allowed remote attackers to cause a denial of service (resource consumption) or bypass the mass assignment protection mechanism via a crafted JSON document that triggers the creation of arbitrary Ruby symbols or certain internal objects.
For the squeeze distribution, theses vulnerabilities have been fixed in version 126.96.36.199-2+deb6u5 of ruby1.9.1. We recommend that you upgrade your ruby1.9.1 package.
NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
SolutionUpgrade the affected packages.