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DCOM key

Last post 09-01-2009 10:12 PM by Blue1978. 8 replies.
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  • 04-06-2009 7:59 AM

    DCOM key

     This check verifies that a DCOM object doesn't have access permissions that allow non-administrator users to change the security settings.

    The settings requested to have set: "Ensure that only Local Administrators Group and Local System are permitted to have greater than "read" access."

    When this item is set the propagtion does not complete. There are about 150+ component keys in there. I have this Registry permission issue come up on every machine I have and would love to remediate the finding The instructions are clear in Retina, but the practical application of them are not. Has anyone resolved this ? What were your steps that lead to success?

    Thanks, Michael

  • 04-07-2009 10:40 AM In reply to

    Re: DCOM key

     Can you copy and paste the Retina audit that is telling you this here?

     

    Filed under:
  • 04-09-2009 8:40 AM In reply to

    Re: DCOM key

     You might have listed a fix here http://forums.eeye.com/forums/p/484/2101.aspx#2101

     but i was able to replicate the steps. Rescanning of DCOM produced the same result.

    Microsoft Windows DCOM Object Registry Permissions
    Audit ID: 5328
    Vul ID:
    Risk Level: Medium
    Sev Code: Category II
    PCI Severity Level: 1 (Low)
    CVSS Score:
    Category: Windows
    Description: This check verifies that a DCOM object doesn't have access permissions that allow non-administrator users to change the security settings.
    How To Fix: Ensure that only Local Administrators Group and Local System are permitted to have greater than "read" access for any DCOM object:
    1. Click Start, Run, type "regedt32", and click OK.
    2. Locate HKEY_LOCAL_MACHINE\Software\Classes\AppID
    3. Select AppID, Right Click, then select Permissions.
    4. Ensure that only Local Administrators Group and Local System are permitted to have greater than "read" access.
    Note: Additional groups must have only "read" access and individual user accounts are not permitted.
    Related Links:

  • 04-09-2009 10:04 AM In reply to

    Re: DCOM key

     So your still having the issue after you completed the steps I was given in that post?

  • 05-29-2009 8:09 AM In reply to

    Re: DCOM key

    New to the forum.

    I am having different issues when this particular vulnerability is remediate.  I have a number of machines (Windows XP Professional, SP3) where functionality has been severly degraded.  They take forever to boot up, the Windows Installer Service ceases to function, there is major time lag between when the user is doing something and when the computer responds.

    Once we re-set DCOM permissions back to they way they were before remediation, all returns to normal.

    Any ideas.

    Thanks,

     

    Jeff Embry

  • 07-03-2009 11:17 AM In reply to

    Re: DCOM key

    gallaghermj:

     This check verifies that a DCOM object doesn't have access permissions that allow non-administrator users to change the security settings.

    The settings requested to have set: "Ensure that only Local Administrators Group and Local System are permitted to have greater than "read" access."

    When this item is set the propagtion does not complete. There are about 150+ component keys in there. I have this Registry permission issue come up on every machine I have and would love to remediate the finding The instructions are clear in Retina, but the practical application of them are not. Has anyone resolved this ? What were your steps that lead to success?

    Thanks, Michael

     

    The solution included in the audit should work, but there is typically a caveat...you have to ensure that you choose the option to replace all child object permissions so that the permissions propogate throughout all subkeys and values.

     

  • 07-03-2009 11:34 AM In reply to

    Re: DCOM key

    jkembry:

    New to the forum.

    I am having different issues when this particular vulnerability is remediate.  I have a number of machines (Windows XP Professional, SP3) where functionality has been severly degraded.  They take forever to boot up, the Windows Installer Service ceases to function, there is major time lag between when the user is doing something and when the computer responds.

    Once we re-set DCOM permissions back to they way they were before remediation, all returns to normal.

    Any ideas.

    Thanks,

     

    Jeff Embry

     

     

    I am wondering as to why this would have caused such a performance degradation, esp if you ensured SYSTEM and Administrators have full access to these keys.   I believe Windows Installer Service runs as SYSTEM, so if SYSTEM has full permissions in this particular registry location...are you propogating all permissions throughout the subkeys?

    The symptoms you described could be numerous different reasons, like applications be restricted to what they can access via DCOM, or a user account or group not having proper access, etc.  Verify the permissions have propogated throughout the keys (as described in my last post). Does that resolve any issues?

    Are there any applications that could depend on needing write access to dcom permissions??   Users other than those in the Administrators Group or the local SYSTEM account should not need greater than read permissions (e.g. read and write).

     

    Filed under:
  • 09-01-2009 1:09 PM In reply to

    • jaws
    • Top 75 Contributor
    • Joined on 09-01-2009
    • Posts 10

    Re: DCOM key Retina Audit ID 5328

     Hi,

      How do you save the current permissions prior to changing them? 

      Is exporting the registry enough? 

      Does making these changes cause problems?

    Thanks,

    Jim

    Filed under:
  • 09-01-2009 10:12 PM In reply to

    Re: DCOM key Retina Audit ID 5328

         If your concerned about saving your registry settings, I would look at using the free program called ERUNT.  This can be found at snapfiles.com and other miscellaneous locations.

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