Amazon Linux AMI : rubygems (ALAS-2013-231)

This script is Copyright (C) 2013-2015 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, 1.8.24 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 .

See also :

Solution :

Run 'yum update rubygems' to update your system.

Risk factor :

Medium / CVSS Base Score : 4.3

Family: Amazon Linux Local Security Checks

Nessus Plugin ID: 70567 ()

Bugtraq ID:

CVE ID: CVE-2013-4363

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