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[DSECRG-09-015] SAP GUI 6.4 Buffer Overflow vulnerability

Digital Security Research Group [DSecRG] Advisory      #DSECRG-09-015

Original Advisory:   http://dsecrg.com/pages/vul/show.php?id=115

Application:                    SAP GUI for Windows,  EnjoySAP
Versions Affected:              Version 6.4 
Vendor URL:                     http://SAP.com
Bugs:                           Buffer Overflow
Exploits:                       YES
Reported:                       13.11.2008
Vendor response:                17.11.2008
Date of Public Advisory:        08.06.2009
Author:                         Alexander Polyakov
                                Digital Security Research Group [DSecRG] 
(research [at] dsec [dot] ru)


SAP GUI for Windows version 6.4 contains ActiveX component SAPIrRfc  which is 
vulnerable to Buffer overflow attack.    

file = sapirrfc.dll
GUID = F6908F83-ADA6-11D0-87AA-00AA00198702


Attacker can construct html page which will call vulnerable function "Accept" 
from ActiveX Object SAPIrRfc with long parameter.
When user open this vulnerable page it will occur DOS (Example 1) or full 
remote control on target system (Example2 execute calc.exe aviable by request) .


<object classid='clsid:77F12F8A-F117-11D0-8CF1-00A0C91D9D87' id='target' />


target.Accept arg1 


Fix Information
The issue has been solved. See SAP note 1286637.

SAP note 1286637



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Regards, Alexander Polyakov
Digital Security Research Group [DSecRG]
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