[ GLSA 200510-01 ] gtkdiskfree: Insecure temporary file creation

From: Thierry Carrez (koon_at_gentoo.org)
Date: 10/03/05

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To: gentoo-announce@lists.gentoo.org

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    Gentoo Linux Security Advisory GLSA 200510-01
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                                                http://security.gentoo.org/
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      Severity: Normal
         Title: gtkdiskfree: Insecure temporary file creation
          Date: October 03, 2005
          Bugs: #104565
            ID: 200510-01

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    Synopsis
    ========

    gtkdiskfree is vulnerable to symlink attacks, potentially allowing a
    local user to overwrite arbitrary files.

    Background
    ==========

    gtkdiskfree is a GTK-based GUI to show free disk space.

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

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 app-admin/gtkdiskfree < 1.9.3-r1 >= 1.9.3-r1

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

    Eric Romang discovered that gtkdiskfree insecurely creates a
    predictable temporary file to handle command output.

    Impact
    ======

    A local attacker could create a symbolic link in the temporary files
    directory, pointing to a valid file somewhere on the filesystem. When
    gtkdiskfree is executed, this would result in the file being
    overwritten with the rights of the user running the application.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All gtkdiskfree users should upgrade to the latest version:

        # emerge --sync
        # emerge --ask --oneshot --verbose ">=app-admin/gtkdiskfree-1.9.3-r1"

    References
    ==========

      [ 1 ] CAN-2005-2918
            http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2918
      [ 2 ] Original Advisory
            http://www.zataz.net/adviso/gtkdiskfree-09052005.txt

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

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

      http://security.gentoo.org/glsa/glsa-200510-01.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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