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  • From: Thomas Houssin <thomas.houssin AT gmail.com>
  • To: sm-security <sm-security AT lists.ibiblio.org>
  • Subject: [SM-Security] ruby: security bypass vulnerability
  • Date: Sun, 13 Nov 2005 23:52:12 +0100

Synopsis
========
ruby allows attackers to bypass safe level and taint flag protections
and execute disallowed code.

Background
==========
ruby is the interpreted scripting language for quick and easy
object-oriented programming. It has many features to process text files
and to do system management tasks (like Perl). It is simple, straight
foward extensible and portable.

Description
===========
CAN-2005-2337:
ruby allows attackers to bypass safe level and taint flag protections
and execute disallowed code when Ruby processes a program through
standard input (stdin).

Impact
======
An attacker could exploit this vulnerability to execute arbitrary code
beyond the restrictions specified in each safe level.

Workaround
==========
There are no known workarounds at this time.

Affected packages
=================
This is now fixed in all grimoires.

Resolution
==========
All ruby users should upgrade to the latest available version:
# scribe update
# cast -c ruby

References
==========
[ 1 ] CAN-2005-2337
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2337
[ 2 ] GLSA 200510-05
http://www.gentoo.org/security/en/glsa/glsa-200510-05.xml

--
Thomas Houssin

Security Team Leader Source Mage GNU/Linux (http://www.sourcemage.org)
Key fingerprint = 3CB8 3FC4 840D B272 E623 BCB8 54DB F4E3 4240 4C36
http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x42404C36


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  • [SM-Security] ruby: security bypass vulnerability, Thomas Houssin, 11/13/2005

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