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

From: Thierry Carrez (koon_at_gentoo.org)
Date: 10/22/05

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To: gentoo-announce@lists.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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