[ GLSA 200503-20 ] curl: NTLM response buffer overflow

[Sune Kloppenborg Jeppesen <jaervosz () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200503-20
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: curl: NTLM response buffer overflow
      Date: March 16, 2005
      Bugs: #82534
        ID: 200503-20

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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 for transferring files via many different
protocols.

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

    -------------------------------------------------------------------
     Package        /  Vulnerable  /                        Unaffected
    -------------------------------------------------------------------
  1  net-misc/curl      < 7.13.1                             >= 7.13.1

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

curl fails to properly check boundaries when handling NTLM
authentication.

Impact
======

With a malicious server an attacker could send a carefully crafted NTLM
response to a connecting client 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.

Resolution
==========

All curl users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/curl-7.13.1"

References
==========

  [ 1 ] CAN-2005-0490
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0490

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

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

  http://security.gentoo.org/glsa/glsa-200503-20.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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