Ubuntu 12.04 LTS / 12.10 : ruby1.9.1 vulnerabilities (USN-1733-1)

Ubuntu Security Notice (C) 2013 Canonical, Inc. / NASL script (C) 2013 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing one or more security-related patches.

Description :

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).

Solution :

Update the affected libruby1.9.1 and / or ruby1.9.1 packages.

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)
CVSS Temporal Score : 6.5
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : false

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 64799 ()

Bugtraq ID: 56484
57785
57899

CVE ID: CVE-2012-5371
CVE-2013-0256
CVE-2013-0269