[NT] Miscrosoft Registry Editor long string key hiding

From: SecuriTeam (support_at_securiteam.com)
Date: 08/30/05

  • Next message: SecuriTeam: "[NEWS] Adobe Version Cue VCNative Multiple Vulnerabilities (Privileges Escalation, Symlink Attack)" 
    To: list@securiteam.com
Date: 30 Aug 2005 18:06:16 +0200

    The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
    - - promotion

    The SecuriTeam alerts list - Free, Accurate, Independent.

    Get your security news from a reliable source.
    http://www.securiteam.com/mailinglist.html

    - - - - - - - - -

      Miscrosoft Registry Editor long string key hiding
    ------------------------------------------------------------------------

    SUMMARY

     
    <http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/regedit_overview.mspx> Microsoft Registry Editor is an advanced tool for viewing and changing settings in your system registry, which contains information about how your computer runs.

    A large key name allow attackers to hide registry keys from users that
    uses the Microsoft Registry Editor.

    DETAILS

    Vulnerable Systems:
     * Microsoft Registry Editor Windows 2000
     * Microsoft Registry Editor Windows XP
     * Microsoft Registry Editor Windows 2003 Server

    A design flaw in Microsoft Registry editor that support Unicode allow
    attackers to place a long key name (longer then the limited size of 255),
    and thus hide the key from Microsoft Registry Editor users.

    In order to exploit this issue, create an external .reg file and import it
    using regedit.exe:

    Proof of Concept:
    hiddenkey.reg:
    Windows Registry Editor Version 5.00

    [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456]

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:aprotas@eeye.com> "Andre
    Protas.

    ========================================

    This bulletin is sent to members of the SecuriTeam mailing list.
    To unsubscribe from the list, send mail with an empty subject line and body to: list-unsubscribe@securiteam.com
    In order to subscribe to the mailing list, simply forward this email to: list-subscribe@securiteam.com

    ====================
    ====================

    DISCLAIMER:
    The information in this bulletin is provided "AS IS" without warranty of any kind.
    In no event shall we be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages.

  • Next message: SecuriTeam: "[NEWS] Adobe Version Cue VCNative Multiple Vulnerabilities (Privileges Escalation, Symlink Attack)"

    Relevant Pages