USN-1733-1: Ruby vulnerabilities

Releases

• Ubuntu 12.10
• Ubuntu 12.04

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)

Update instructions

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

Ubuntu 12.10

• ruby1.9.1 - 1.9.3.194-1ubuntu1.3
• libruby1.9.1 - 1.9.3.194-1ubuntu1.3

Ubuntu 12.04

• ruby1.9.1 - 1.9.3.0-1ubuntu2.5
• libruby1.9.1 - 1.9.3.0-1ubuntu2.5

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

References

• CVE-2012-5371
• CVE-2013-0256
• CVE-2013-0269