[DSECRG-11-039] SAP NetWeaver TH_GREP module - Code injection vulnerability
(NEW)
TH_GREP report is vulnerable for command execution vulnerability which is
working with previous patch (note 1433101). Remote OS command execution is
possible
Application: SAP NetWeaver
Versions Affected: SAP NetWeaver
Vendor URL: http://www.SAP.com
Bugs: Command execution
Reported: 08.04.2011
Vendor response: 09.04.2011
Date of Public Advisory: 11.11.2011
CVSS: 6.0
CVE-number:
Author: Alexey Tyurin from DSecRG (research center of ERPScan)
Description
***********
TH_GREP report is vulnerable for command execution vulnerability which is
working with previous patch (note 1433101). Remote OS command execution is
possible
Details
*******
This vulnerability exists in patched version (note 1433101) because this note
secure only linux but we found that windows is vulnerable too.
There is ability for command execution via SA "TH_GREP" RFC-function in OS
Windows.
The problem contains in user input validation absence of "TH_GREP"
RFC-function's parameters. An attacker can insert malicious code in
"<STRING>"-parameter for command execution.
There are minimum 3 ways of command execution and attacker must have valid
credentials:
1) In transaction "Se37"
2) via "startrfc" command with "TH_GREP" RFC-function
3) via a crafted "TH_GREP" RFC-SOAP-request
Example:
******
Working exploit is available in commercial scanner ERPScan Security Scanner for
SAP (http://erpscan.com)
References
**********
http://erpscan.com/advisories/dsecrg-11-039-sap-netweaver-th_grep-module-code-injection-vulnerability-new/
http://www.sdn.sap.com/irj/sdn/index?rid=/webcontent/uuid/c05604f6-4eb3-2d10-eea7-ceb666083a6a
https://service.sap.com/sap/support/notes/1580017
Fix Information
*************
Solution to this issue is given in the SAP Security Note 1580017.
About DSecRG
*******
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
*******
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.polya...@erpscan.com
www.erpscan.com
www.dsecrg.com
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