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[DSECRG-11-038] SAP RSTXSCRP report - smb relay vulnerability
From: Alexandr Polyakov <alexandr.polyakov () dsec ru>
Date: Thu, 17 Nov 2011 20:25:36 +0400


                
[DSECRG-11-038] SAP RSTXSCRP report - smb relay vulnerability 

SAP RSTXSCRP Report has path traversal vulnerability which can lead to SMB relay attack and full control on system. 

Application:     SAP NetWeaver 
Versions Affected:       SAP NetWeaver 
Vendor URL:      http://www.SAP.com
Bugs:    Path traversal, SMBRelay
Reported:        14.03.2011
Vendor response:         16.03.2011
Date of Public Advisory:        11.11.2011
CVSS:    2.1
CVE-number: 
Author:  Dmitriy Chastuchin from DSecRG (research center of ERPScan)

Description
***********
SAP RSTXSCRP Report has path traversal vulnerability which can lead to SMB relay attack and full control on system.
Details
*******
Using transaction "sa38" and report "RSTXSCRP" attacker can insert malicious UNC path in "File Name" field and chose 
radio button "From/on application server"
For successful SMB Relay attack realization attacker should enforce to initiate SMB session on attacker server via UNC 
path request. SMB client will try to access a remote SMB service on an attacker's machine. 

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

References
**********
http://erpscan.com/advisories/dsecrg-11-038-sap-rstxscrp-report-smb-relay-vulnerability/
http://www.sdn.sap.com/irj/sdn/index?rid=/webcontent/uuid/c05604f6-4eb3-2d10-eea7-ceb666083a6a
https://service.sap.com/sap/support/notes/1583286




Fix Information
*************
Solution to this issue is given in the SAP Security Note 1583286.


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


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