[ GLSA 200510-19 ] cURL: NTLM username stack overflow

[Thierry Carrez <koon () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200510-19
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: cURL: NTLM username stack overflow
      Date: October 22, 2005
      Bugs: #109097
        ID: 200510-19

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Synopsis
========

cURL is vulnerable to a buffer overflow which could lead to the
execution of arbitrary code.

Background
==========

cURL is a command line tool and library for transferring files via many
different protocols. It supports NTLM authentication to retrieve files
from Windows-based systems.

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

    -------------------------------------------------------------------
     Package        /  Vulnerable  /                        Unaffected
    -------------------------------------------------------------------
  1  net-misc/curl      < 7.15.0                             >= 7.15.0

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

iDEFENSE reported that insufficient bounds checking on a memcpy() of
the supplied NTLM username can result in a stack overflow.

Impact
======

A remote attacker could setup a malicious server and entice an user to
connect to it using a cURL client, potentially leading to the execution
of arbitrary code with the permissions of the user running cURL.

Workaround
==========

Disable NTLM authentication by not using the --anyauth or --ntlm
options when using cURL (the command line version). Workarounds for
programs that use the cURL library depend on the configuration options
presented by those programs.

Resolution
==========

All cURL users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/curl-7.15.0"

References
==========

  [ 1 ] CVE-2005-3185
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3185
  [ 2 ] iDefense Security Advisory 10.13.05

http://www.idefense.com/application/poi/display?id=322&type=vulnerabilities

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

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

  http://security.gentoo.org/glsa/glsa-200510-19.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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