[ GLSA 200512-15 ] rssh: Privilege escalation

[Stefan Cornelius <dercorny () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200512-15
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                                            http://security.gentoo.org/
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  Severity: High
     Title: rssh: Privilege escalation
      Date: December 27, 2005
      Bugs: #115082
        ID: 200512-15

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Synopsis
========

Local users could gain root privileges by chrooting into arbitrary
directories.

Background
==========

rssh is a restricted shell, allowing only a few commands like scp or
sftp. It is often used as a complement to OpenSSH to provide limited
access to users.

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

    -------------------------------------------------------------------
     Package          /  Vulnerable  /                      Unaffected
    -------------------------------------------------------------------
  1  app-shells/rssh       < 2.3.0                            >= 2.3.0

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

Max Vozeler discovered that the rssh_chroot_helper command allows local
users to chroot into arbitrary directories.

Impact
======

A local attacker could exploit this vulnerability to gain root
privileges by chrooting into arbitrary directories.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All rssh users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-shells/rssh-2.3.0"

References
==========

  [ 1 ] CVE-2005-3345
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3345
  [ 2 ] rssh security announcement
        http://www.pizzashack.org/rssh/security.shtml

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

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

  http://security.gentoo.org/glsa/glsa-200512-15.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

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