Gentoo: Ruby Arbitrary command execution through XML-RPC
Posted by Benjamin D. Thomas   
Gentoo A vulnerability in XMLRPC.iPIMethods allows remote attackers to execute arbitrary commands.
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Gentoo Linux Security Advisory                           GLSA 200507-10
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                                            http://security.gentoo.org/
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  Severity: High
     Title: Ruby: Arbitrary command execution through XML-RPC
      Date: July 11, 2005
      Bugs: #96784
        ID: 200507-10

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Synopsis
========

A vulnerability in XMLRPC.iPIMethods allows remote attackers to execute
arbitrary commands.

Background
==========

Ruby is an interpreted scripting language for quick and easy
object-oriented programming. XML-RPC is a remote procedure call
protocol encoded in XML.

Affected packages
=================

    -------------------------------------------------------------------
     Package        /  Vulnerable  /                        Unaffected
    -------------------------------------------------------------------
  1  dev-lang/ruby     < 1.8.2-r2                          >= 1.8.2-r2

Description
===========

Nobuhiro IMAI reported that an invalid default value in "utils.rb"
causes the security protections of the XML-RPC server to fail.

Impact
======

A remote attacker could exploit this vulnerability to execute arbitrary
commands.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Ruby users should upgrade to the latest available version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-lang/ruby-1.8.2-r2"

References
==========

  [ 1 ] CAN-2005-1992
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1992
  [ 2 ] Ruby Security Announcement
        http://www.ruby-lang.org/en/20050701.html

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200507-10.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2005 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.0