[DSECRG-11-041] SAP NetWeaver - Authentication bypass (Verb Tampering) 

Authentication bypass vulnerability in SAP NetWeaver CTC service can be exploited for unauthorized user management and OS command execution. 

Application:     SAP NetWeaver 
Versions Affected:       SAP NetWeaver 
Vendor URL:      http://www.SAP.com
Bugs:    Auth bypass, Verb tampering
Reported:        14.03.2011
Vendor response:         15.03.2011
Date of Public Advisory:        11.11.2011
CVSS:    7.3 by SAP (10 by ERPSCAN)
CVE-number: 
Author:  Alexandr Polyakov from DSecRG (research center of ERPScan)

Description
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Authentication bypass vulnerability in SAP NetWeaver CTC service can be exploited for unauthorized user management and OS command execution.
Details
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Attacker can bypass Authentication using Verb Tampering vulnerability

Example:
******
Working exploit is available in commercial scanner ERPScan Security Scanner for SAP (http://erpscan.com)

References
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http://erpscan.com/advisories/dsecrg-11-041-sap-netweaver-authentication-bypass-verb-tampering/
http://www.sdn.sap.com/irj/sdn/index?rid=/webcontent/uuid/c05604f6-4eb3-2d10-eea7-ceb666083a6a
https://service.sap.com/sap/support/notes/1589525
http://erpscan.com/wp-content/uploads/2011/08/A-crushing-blow-at-the-heart-SAP-J2EE-engine_whitepaper.pdf




Fix Information
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Solution to this issue is given in the SAP Security Note 1589525, 1624450



About DSecRG
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The main mission of DSecRG is to conduct researches of business critical systems such as ERP, CRM, SRM, BI, SCADA, banking software and others. The result of this work is then integrates in ERPScan Security Scanner. Being on the top edge of ERP and SAP security DSecRG research helps to improve a quality of ERPScan consulting services and protects you from the latest threads. 
Contact: research [at] dsecrg [dot] com
http://www.dsecrg.com 

About ERPScan
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ERPScan is an innovative company engaged in the research of ERP security and develops products for ERP system security assessment. Apart from this the company renders consulting services for secure configuration, development and implementation of ERP systems, and conducts comprehensive assessments and penetration testing of custom solutions.
Our flagship products are "ERPScan Security Scanner for SAP" and service "ERPScan Online" which can help customers to perform automated security assessments and compliance checks for SAP solutions.

Contact: info [at] erpscan [dot] com
http://www.erpscan.com 





Polyakov Alexander
CTO ERPScan
Head of DSecRG
______________________
phone:  +7 812 703 1547
        +7 812 430 9130
e-mail: a.polyakov@erpscan.com

www.erpscan.com
www.dsecrg.com


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