[ GLSA 200802-06 ] scponly: Multiple vulnerabilities

[Pierre-Yves Rofes <py () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200802-06
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: scponly: Multiple vulnerabilities
      Date: February 12, 2008
      Bugs: #201726, #203099
        ID: 200802-06

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Synopsis
========

Multiple vulnerabilities in scponly allow authenticated users to bypass
security restrictions.

Background
==========

scponly is a shell for restricting user access to file transfer only
using sftp and scp.

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

    -------------------------------------------------------------------
     Package           /  Vulnerable  /                     Unaffected
    -------------------------------------------------------------------
  1  net-misc/scponly        < 4.8                              >= 4.8

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

Florian Weimer from Debian discovered that scponly does not filter the
- -o and -F options to the scp executable (CVE-2007-6415). Joachim
Breitner reported that Subversion and rsync support invokes subcommands
in an insecure manner (CVE-2007-6350).

Impact
======

A local attacker could exploit these vulnerabilities to elevate
privileges and execute arbitrary commands on the vulnerable host.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All scponly users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/scponly-4.8"

Due to the design of scponly's Subversion support, security
restrictions can still be circumvented. Please read carefully the
SECURITY file included in the package.

References
==========

  [ 1 ] CVE-2007-6350
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6350
  [ 2 ] CVE-2007-6415
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6415

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

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

  http://security.gentoo.org/glsa/glsa-200802-06.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 2008 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/2.5
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