Amazon Linux AMI : ruby19 Denial of Service (ALAS-2014-290)

This script is Copyright (C) 2014 Tenable Network Security, Inc.


Synopsis :

The remote Amazon Linux AMI host is missing a security update.

Description :

Algorithmic complexity vulnerability in
Gem::Version::ANCHORED_VERSION_PATTERN in lib/rubygems/version.rb in
RubyGems before 1.8.23.2, 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.

See also :

http://www.nessus.org/u?3d1e84d0

Solution :

Run 'yum update ruby19' to update your system.

Risk factor :

Medium / CVSS Base Score : 4.3
(CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P)

Family: Amazon Linux Local Security Checks

Nessus Plugin ID: 72746 ()

Bugtraq ID:

CVE ID: CVE-2013-4363