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IIS/Network Service registry audit failure for Disallowed certific


IIS/Network Service registry audit failure for Disallowed certific TimG
4/16/2008 7:38:02 AM
iis security: We are required to have failure auditing on the HKLM\Software and HKLM\System
registry hives (implemented recently) and now we are getting several thousand
of the following event in just a couple of days. Why does it need all the
WRITE, Set, and Create access privileges? No IIS problem has been currently
traced to this failure audit yet, but it does result in Windows issues
because it contributes to filling up our system drive with archived security
event logs because we are not allowed to overwrite events when the log is
full.
-----------------------------------------------------------------------
Event Type: Failure Audit
Event Source: Security
Event Category: Object Access
Event ID: 560
User: NT AUTHORITY\NETWORK SERVICE
Description:
Object Open:
Object Server: Security
Object Type: Key
Object Name:
\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\Disallowed
Handle ID: -
Operation ID: {0,18914555}
Image File Name: C:\WINDOWS\system32\inetsrv\w3wp.exe
Primary User Name: NETWORK SERVICE
Primary Domain: NT AUTHORITY
Primary Login ID: (0x0,0x3E4)
Client User Name: -
Client Domain: -
Client Login ID: -
Accesses:
DELETE, READ_CONTROL, WRITE_DAC, WRITE_OWNER, Query key value, Set key
value, Create sub-key, Enumerate sub-keys, Notify about changes to keys,
Create Link
Privileges: -
Restricted Sid Count: 0
Access Mask: 0xF003F
-----------------------------------------------------------------------
Thanks,

Re: IIS/Network Service registry audit failure for Disallowed certific David Wang
4/16/2008 6:21:44 PM
[quoted text, click to view]


Your policy of failure auditing is going to cause you headaches
because it doesn't work the way you think or how you are describing
the issue.

You want to read Eric's blog on the topic of audit logging:

http://blogs.msdn.com/ericfitz/archive/2005/01/11/350848.aspx


//David
http://w3-4u.blogspot.com
http://blogs.msdn.com/David.Wang
Re: IIS/Network Service registry audit failure for Disallowed cer TimG
4/17/2008 6:36:01 AM
I have browsed many of Eric's discussions on auditing in the past (including
the one David referenced) and have found them very useful, unfortunately we
are required to have C2 compliant auditing enabled and provide justification
for any deviations.

Is there a reason that Network Service is attempting to get all these access
rights to the Disallowed key for IIS?

--
Thanks,

Tim


[quoted text, click to view]
Re: IIS/Network Service registry audit failure for Disallowed certific wjzhang@online.microsoft.com (
4/17/2008 8:37:48 AM
Hi Tim,

I agree with David. You should be able to safely ignore these access denied
failures and stop auditting to avoid the security events. Network Service
account should only requires Read permission on these certificate store
related registry entities. By default, Local Users group already has the
Read permission. So SSL stuff is working fine, you do not need to change
anything or grant rights to the account.

Please update here if you have any further concern on this.

Thanks.

Sincerely,

WenJun Zhang

Microsoft Online Community Support

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Re: IIS/Network Service registry audit failure for Disallowed cer David Wang
4/17/2008 3:24:05 PM
The best way to resolve this will be for you to open a support ticket
with Microsoft PSS to get an explanation/fix.

IIS6 is not installed by default so the C2 complaince team couldn't
have known. I can also tell you that C2 complaince was not on the IIS6
team's radar during development, so it is very possible that we are
inadvertently spamming the audit.

The support ticket is the only way you can make forward progress. We
can discuss it all day, but without the support ticket, no change will
happen.


//David
http://w3-4u.blogspot.com
http://blogs.msdn.com/David.Wang
//





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Re: IIS/Network Service registry audit failure for Disallowed cer TimG
4/17/2008 6:11:01 PM
I will attempt to open a support incident.

--
Thanks,

Tim


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