Full Disclosure mailing list archives
smtpsvc and undocumented registry values
From: Thierry Haven <thierry.haven () xmcopartners com>
Date: Wed, 23 Feb 2005 18:26:40 +0100
Hi, I’ve been hacking around smtpsvc.dll (Windows Server 2003) in order to hide the Server version when a mail is relayed: Original header:"from [192.168.X.X] ([192.168.X.X]) by winserv2003 with Microsoft SMTPSVC(6.0.3790.0); Wed, 23 Feb 2005 15:47:51 +0100"
I found that it is possible to remove this information by patching the code directly in the DLL: Modified header:"from [192.168.X.X] ([192.168.X.X]) by winserv2003 with some server; Wed, 23 Feb 2005 15:49:51 +0100" ... Assuming that smtpsvc.dll checks its own version at runtime by retrieving information in the .rsrc section of the PE thanks to version.dll calls. However I'd like to know if there is a better way to disable this "feature" (maybe a key in the registry ?).
Next I'd like to ask about such undocumented registry values. Where to find information about them ? Best Regards, _______________________________________ Thierry Haven - Xmco Partners Security Consulting / Pentest web : http://www.xmcopartners.com _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
Current thread:
- Nice call to ebx found class 101 (Feb 09)
- Re: Nice call to ebx found Thierry Haven (Feb 11)
- smtpsvc and undocumented registry values Thierry Haven (Feb 23)
- Re: smtpsvc and undocumented registry values Andres Tarasco (Feb 23)
- smtpsvc and undocumented registry values Thierry Haven (Feb 23)
- <Possible follow-ups>
- Re: Nice call to ebx found class 101 (Feb 11)
- Re: Nice call to ebx found Thierry Haven (Feb 11)