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                                  CERT-Renater

                       Note d'Information No. 2005/VULN193
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DATE                      : 17/03/2005

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Systems running curl versions prior to 7.13.1.

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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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