1. Ubuntu Security Notices
  2. USN-1733-1

USN-1733-1: Ruby vulnerabilities

Publication date

21 February 2013

Overview

Several security issues were fixed in Ruby.

Releases

Packages

  • ruby1.9.1 - Interpreter of object-oriented scripting language Ruby

Details

Jean-Philippe Aumasson discovered that Ruby incorrectly generated
predictable hash values. An attacker could use this issue to generate hash
collisions and cause a denial of service. (CVE-2012-5371)

Evgeny Ermakov discovered that documentation generated by rdoc is
vulnerable to a cross-site scripting issue. With cross-site scripting
vulnerabilities, if a user were tricked into viewing a specially crafted
page, a remote attacker could exploit this to modify the contents, or steal
confidential data, within the same domain. (CVE-2013-0256)

Thomas Hollstegge and Ben Murphy discovered that the JSON implementation
in Ruby incorrectly handled certain crafted documents. An attacker could
use this issue to cause a denial of service or bypass certain protection
mechanisms. (CVE-2013-0269)

Jean-Philippe Aumasson discovered that Ruby incorrectly generated
predictable hash values. An attacker could use this issue to generate hash
collisions and cause a denial of service. (CVE-2012-5371)

Evgeny Ermakov discovered that documentation generated by rdoc is
vulnerable to a cross-site scripting issue. With cross-site scripting
vulnerabilities, if a user were tricked into viewing a specially crafted
page, a remote attacker could exploit this to modify the contents, or steal
confidential data, within the same domain. (CVE-2013-0256)

Thomas Hollstegge and Ben Murphy discovered that the JSON implementation
in Ruby incorrectly handled certain crafted documents. An attacker could
use this issue to cause a denial of service or bypass certain protection
mechanisms. (CVE-2013-0269)

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
12.10 quantal ruby1.9.1 –  1.9.3.194-1ubuntu1.3
libruby1.9.1 –  1.9.3.194-1ubuntu1.3
12.04 precise ruby1.9.1 –  1.9.3.0-1ubuntu2.5
libruby1.9.1 –  1.9.3.0-1ubuntu2.5

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›