From: kuffya@gmail.com
Date: Thu Apr 27 2006 - 12:08:00 EDT
I'm testing a sharepoint portal running on IIS 6.0.The exact version (banner based) is:
MicrosoftSharePointTeamServices: 6.0.2
I've identified the folllowing dlls, which are viewable (and perhaps modifiable, if the list helps) by non-admin accounts:
/_vti_bin/_vti_adm/admin.dll
/_vti_bin/_vti_aut/author.dll
/_vti_bin/shtml.dll
When viewed, the first two return the following screen:
method=
status=
* status=262147
* osstatus=0
* msg=No "CONTENT_TYPE" in CGI environment.
* osmsg=
whilst the shtml.dll returns a 'sharepoint error' message.
I did some serious googling and attempted various POST attacks that reportedly (http://www.packetstormsecurity.org/9910-exploits/webfolders.txt)
used to work (priv. escalation) back in the day. but without success. I've also seen a BlackHat presentation from 2003 covering the same methods of attack (carefully crafted POSTing). These methods refer to Frontpage extensions, but I assume that the same principles are in use in sharepoint.
I wonder if anyone out there has any interesting ideas or ways to achieve privilege escalation in such a scenario, or do anything othewise 'bad'. I'm not too optimistic, as this being a standard microsoft application must have been extensively tested before release and old bugs must have been fixed. Or not?
On another note, does one need to keep this files accessible/viewable at all?
Many thanks
Stelios
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