[Full-disclosure] [ GLSA 200511-07 ] OpenVPN: Multiple vulnerabilities

From: Thierry Carrez (koon_at_gentoo.org)
Date: 11/06/05

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    Date: Sun, 06 Nov 2005 19:26:37 +0100
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    Gentoo Linux Security Advisory GLSA 200511-07
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                                                http://security.gentoo.org/
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      Severity: Normal
         Title: OpenVPN: Multiple vulnerabilities
          Date: November 06, 2005
          Bugs: #111116
            ID: 200511-07

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    Synopsis
    ========

    The OpenVPN client is potentially vulnerable to the execution of
    arbitrary code and the OpenVPN server is vulnerable to a Denial of
    Service issue.

    Background
    ==========

    OpenVPN is a multi-platform, full-featured SSL VPN solution.

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

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 net-misc/openvpn < 2.0.4 >= 2.0.4

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

    The OpenVPN client contains a format string bug in the handling of the
    foreign_option in options.c. Furthermore, when the OpenVPN server runs
    in TCP mode, it may dereference a NULL pointer under specific error
    conditions.

    Impact
    ======

    A remote attacker could setup a malicious OpenVPN server and trick the
    user into connecting to it, potentially executing arbitrary code on the
    client's computer. A remote attacker could also exploit the NULL
    dereference issue by sending specific packets to an OpenVPN server
    running in TCP mode, resulting in a Denial of Service condition.

    Workaround
    ==========

    Do not use "pull" or "client" options in the OpenVPN client
    configuration file, and use UDP mode for the OpenVPN server.

    Resolution
    ==========

    All OpenVPN users should upgrade to the latest version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=net-misc/openvpn-2.0.4"

    References
    ==========

      [ 1 ] CVE-2005-3393
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3393
      [ 2 ] CVE-2005-3409
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3409
      [ 3 ] OpenVPN changelog
            http://openvpn.net/changelog.html

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

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

      http://security.gentoo.org/glsa/glsa-200511-07.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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  • Next message: Thierry Carrez: "[Full-disclosure] [ GLSA 200511-06 ] fetchmail: Password exposure in fetchmailconf"

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