[ GLSA 200903-21 ] cURL: Arbitrary file access

From: Tobias Heinlein <keytoaster@gentoo.org>
To: gentoo-announce@gentoo.org
Cc: bugtraq@securityfocus.com,full-disclosure@lists.grok.org.uk,security-alerts@linuxsecurity.com
Subject: [ GLSA 200903-21 ] cURL: Arbitrary file access
Date:


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Gentoo Linux Security Advisory                           GLSA 200903-21
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: cURL: Arbitrary file access
      Date: March 09, 2009
      Bugs: #260361
        ID: 200903-21

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Synopsis
========

A vulnerability in cURL may allow for arbitrary file access.

Background
==========

cURL is a command line tool for transferring files with URL syntax,
supporting numerous protocols.

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

    -------------------------------------------------------------------
     Package        /  Vulnerable  /                        Unaffected
    -------------------------------------------------------------------
  1  net-misc/curl      < 7.19.4                             >= 7.19.4

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

David Kierznowski reported that the redirect implementation accepts
arbitrary Location values when CURLOPT_FOLLOWLOCATION is enabled.

Impact
======

A remote attacker could possibly exploit this vulnerability to make
remote HTTP servers trigger arbitrary requests to intranet servers and
read or overwrite arbitrary files via a redirect to a file: URL, or, if
the libssh2 USE flag is enabled, execute arbitrary commands via a
redirect to an scp: URL.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All cURL users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/curl-7.19.4"

References
==========

  [ 1 ] CVE-2009-0037
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0037

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

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

  http://security.gentoo.org/glsa/glsa-200903-21.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 2009 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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