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Subject Author Date
SAMR named pipe adrianwheway 01-31-2008
`--> Re: SAMR named pipe Lognoul, Marc [...01-31-2008
Posted by adrianwheway on January 31, 2008, 10:35 am
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Hi there,

On my Windows 2003 servers I prevent anonymous sid and name
translation, I do not allow anonymous enumeration of SAM accounts or
shares and I do not allow the everyone permission to apply to
anonymous users. I also do not allow any named pipes to be accessed
anonymously.

I have an application that manages passwords and in order to change
the passwords of accounts on remote servers across the network, the
target servers must allow anonymous access to the named pipe SAMR.

Are there any serious security implications if I allow anonymous
access to the SAMR named pipe, but keep the other restrictions in
place?

Thanks,
Adrian.

Posted by Lognoul, Marc [Private] on January 31, 2008, 3:48 pm
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Doing so would allow an unauthenticated user or system to "harvest" users,
groups and other security-related information.
This would ease password guessing.

I found pretty strange that an application managing password needs anonymous
access. Is this application rather old?

--
KR/Amicalement/MVG,
Marc

> Hi there,
>
> On my Windows 2003 servers I prevent anonymous sid and name
> translation, I do not allow anonymous enumeration of SAM accounts or
> shares and I do not allow the everyone permission to apply to
> anonymous users. I also do not allow any named pipes to be accessed
> anonymously.
>
> I have an application that manages passwords and in order to change
> the passwords of accounts on remote servers across the network, the
> target servers must allow anonymous access to the named pipe SAMR.
>
> Are there any serious security implications if I allow anonymous
> access to the SAMR named pipe, but keep the other restrictions in
> place?
>
> Thanks,
> Adrian.


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