[ GLSA 200407-01 ] Esearch: Insecure temp file handling

From: Joshua J. Berry (condordes_at_gentoo.org)
Date: 07/01/04

  • Next message: Valdis.Kletnieks_at_vt.edu: "Re: [Full-Disclosure] Web sites compromised by IIS attack"
    Date: Thu, 1 Jul 2004 11:01:46 -0700
    To: gentoo-announce@lists.gentoo.org
    
    
    

    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    Gentoo Linux Security Advisory GLSA 200407-01
    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                                http://security.gentoo.org/
    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

      Severity: Normal
         Title: Esearch: Insecure temp file handling
          Date: July 01, 2004
          Bugs: #55424
            ID: 200407-01

    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    Synopsis
    ========

    The eupdatedb utility in esearch creates a file in /tmp without first
    checking for symlinks. This makes it possible for any user to create
    arbitrary files.

    Background
    ==========

    Esearch is a replacement for the Portage command "emerge search". It
    uses an index to speed up searching of the Portage tree.

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

        -------------------------------------------------------------------
         Package / Vulnerable / Unaffected
        -------------------------------------------------------------------
      1 app-portage/esearch <= 0.6.1 >= 0.6.2

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

    The eupdatedb utility uses a temporary file (/tmp/esearchdb.py.tmp) to
    indicate that the eupdatedb process is running. When run, eupdatedb
    checks to see if this file exists, but it does not check to see if it
    is a broken symlink. In the event that the file is a broken symlink,
    the script will create the file pointed to by the symlink, instead of
    printing an error and exiting.

    Impact
    ======

    An attacker could create a symlink from /tmp/esearchdb.py.tmp to a
    nonexistent file (such as /etc/nologin), and the file will be created
    the next time esearchdb is run.

    Workaround
    ==========

    There is no known workaround at this time. All users should upgrade to
    the latest available version of esearch.

    Resolution
    ==========

    All users should upgrade to the latest available version of esearch, as
    follows:

        # emerge sync

        # emerge -pv ">=app-portage/esearch-0.6.2"
        # emerge ">=app-portage/esearch-0.6.2"

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

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

         http://security.gentoo.org/glsa/glsa-200407-01.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 2004 Gentoo Technologies, 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

    
    



  • Next message: Valdis.Kletnieks_at_vt.edu: "Re: [Full-Disclosure] Web sites compromised by IIS attack"

    Relevant Pages