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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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