[Full-disclosure] [ GLSA 200903-21 ] cURL: Arbitrary file access

[Tobias Heinlein]

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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 at 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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