[ GLSA 200410-25 ] Netatalk: Insecure tempfile handling in etc2ps.sh

From: Luke Macken (lewk_at_gentoo.org)
Date: 10/25/04

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    Gentoo Linux Security Advisory GLSA 200410-25
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                                                http://security.gentoo.org/
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      Severity: Normal
         Title: Netatalk: Insecure tempfile handling in etc2ps.sh
          Date: October 25, 2004
          Bugs: #66370
            ID: 200410-25

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    Synopsis
    ========

    The etc2ps.sh script, included in the Netatalk package, is vulnerable
    to symlink attacks, potentially allowing a local user to overwrite
    arbitrary files with the rights of the user running the utility.

    Background
    ==========

    Netatalk is a kernel level implementation of the AppleTalk Protocol
    Suite, which allows Unix hosts to act as file, print, and time servers
    for Apple computers. It includes several script utilities, including
    etc2ps.sh.

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

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 net-fs/netatalk < 1.6.4-r1 >= 1.6.4-r1

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

    The etc2ps.sh script creates temporary files in world-writeable
    directories with predictable names.

    Impact
    ======

    A local attacker could create symbolic links in the temporary files
    directory, pointing to a valid file somewhere on the filesystem. When
    etc2ps.sh is executed, this would result in the file being overwritten
    with the rights of the user running the utility, which could be the
    root user.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All Netatalk users should upgrade to the latest version:

        # emerge sync

        # emerge -pv ">=net-fs/netatalk-1.6.4-r1"
        # emerge ">=net-fs/netatalk-1.6.4-r1"

    References
    ==========

      [ 1 ] CAN-2004-0974
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0974

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

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

      http://security.gentoo.org/glsa/glsa-200410-25.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 2004 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/1.0

    
    



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