[ GLSA 200502-30 ] cmd5checkpw: Local password leak vulnerability

From: Thierry Carrez (koon_at_gentoo.org)
Date: 02/25/05

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To: gentoo-announce@lists.gentoo.org

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    Gentoo Linux Security Advisory GLSA 200502-30
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                                                http://security.gentoo.org/
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      Severity: Low
         Title: cmd5checkpw: Local password leak vulnerability
          Date: February 25, 2005
          Bugs: #78256
            ID: 200502-30

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    Synopsis
    ========

    cmd5checkpw contains a flaw allowing local users to access other users
    cmd5checkpw passwords.

    Background
    ==========

    cmd5checkpw is a checkpassword compatible authentication program that
    uses CRAM-MD5 authentication mode.

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

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 net-mail/cmd5checkpw <= 0.22-r1 >= 0.22-r2

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

    Florian Westphal discovered that cmd5checkpw is installed setuid
    cmd5checkpw but does not drop privileges before calling execvp(), so
    the invoked program retains the cmd5checkpw euid.

    Impact
    ======

    Local users that know at least one valid /etc/poppasswd user/password
    combination can read the /etc/poppasswd file.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All cmd5checkpw users should upgrade to the latest available version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=net-mail/cmd5checkpw-0.22-r2"

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

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

      http://security.gentoo.org/glsa/glsa-200502-30.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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