[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 ""-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.polyakov@erpscan.com www.erpscan.com www.dsecrg.com ----------------------------------- This message and any attachment are confidential and may be privileged or otherwise protected from disclosure. If you are not the intended recipient any use, distribution, copying or disclosure is strictly prohibited. If you have received this message in error, please notify the sender immediately either by telephone or by e-mail and delete this message and any attachment from your system. Correspondence via e-mail is for information purposes only. Digital Security neither makes nor accepts legally binding statements by e-mail unless otherwise agreed. -----------------------------------