Amazon Linux AMI : rubygems (ALAS-2013-231)
Medium Nessus Plugin ID 70567
SynopsisThe remote Amazon Linux AMI host is missing a security update.
DescriptionAlgorithmic complexity vulnerability in Gem::Version::ANCHORED_VERSION_PATTERN in lib/rubygems/version.rb in RubyGems before 220.127.116.11, 1.8.24 through 1.8.26, 2.0.x before 2.0.10, and 2.1.x before 2.1.5, as used in Ruby 1.9.0 through 2.0.0p247, allows remote attackers to cause a denial of service (CPU consumption) via a crafted gem version that triggers a large amount of backtracking in a regular expression. NOTE: this issue is due to an incomplete fix for CVE-2013-4287 .
SolutionRun 'yum update rubygems' to update your system.