[ERPSCAN-15-005] SAP Mobile Platform - XXE

ERPSCAN Research Advisory [ERPSCAN-15-005] SAP Mobile Platform - XXE


Application:            SAP Mobile Platform 2.3
Versions Affected:        SAP Mobile Platform 2.3, probably others
Vendor URL:            http://SAP.com
Bugs:                XML eXternal Entity
Sent:                06.11.14
Reported:            06.11.14
Vendor response:                07.11.14
Date of Public Advisory:        18.06.2015
Reference:            SAP Security Note 2125358
Author:                Dmitry Chastukhin (ERPScan)


Description


1. ADVISORY INFORMATION
Title: SAP Mobile Platform 2.3
Advisory ID: [ERPSCAN-15-005]
Risk: High
Advisory URL: http://erpscan.com/advisories/erpscan-15-005-sap-mobile-platform-xxe/
Date published: 15.02.2015
Vendors contacted: SAP


2. VULNERABILITY INFORMATION
Class: XML External Entity [CWE-611]
Impact: information disclosure, denial of service, read file
Remotely Exploitable: Yes
Locally Exploitable: No
CVE Name: CVE-2015-2813


3. VULNERABILITY DESCRIPTION
1) An attacker can read an arbitrary file on the server by sending a correct XML request with a crafted DTD to/scc/messagebroker/http and reading the reply from the service.
2) An attacker can perform a DoS attack (for example, an XML Entity Expansion attack)
3) A SMB Relay attack is a type of Man-in-the-Middle attack where the attacker asks the victim to authenticate into a machine controlled by the attacker, then relays the credentials to the target. The attacker forwards the authentication information both ways, giving them access.


4. VULNERABLE PACKAGES
SAP Mobile Platform 2.2
SAP Mobile Platform 2.3
Other versions are probably affected too, but they were not checked.


5. SOLUTIONS AND WORKAROUNDS
To correct this vulnerability, install SAP Security Note 2125358 or:
* Upgrade your existing SMP 2.2 installation to SMP 2.2 SP06 PL02
* Upgrade your existing SMP 2.3 installatoin to SMP 2.3 SP05 PL01


6. AUTHOR
Dmitry Chastuin (ERPScan)


7. TECHNICAL DESCRIPTION
SAP XML parser (/scc/messagebroker/http) validates all incoming XML requests with a user-specified DTD.


8. REPORT TIMELINE
Sent:                06.11.14
Reported:            07.11.14
Vendor response:                07.11.14
Date of Public Advisory:        18.06.2015


9. REFERENCES
http://erpscan.com/advisories/erpscan-15-005-sap-mobile-platform-xxe/


10. ABOUT ERPScan Research
The company’s expertise is based on the research subdivision of ERPScan, which is engaged in vulnerability research and analysis of critical enterprise applications. It has achieved multiple acknowledgments from the largest software vendors like SAP, Oracle, Microsoft, IBM, VMware, HP for discovering more than 400 vulnerabilities in their solutions (200 of them just in SAP!).
ERPScan researchers are proud to have exposed new types of vulnerabilities (TOP 10 Web Hacking Techniques 2012) and to be nominated for the best server-side vulnerability at BlackHat 2013.
ERPScan experts have been invited to speak, present, and train at 60+ prime international security conferences in 25+ countries across the continents. These include BlackHat, RSA, HITB, and private SAP trainings in several Fortune 2000 companies.
ERPScan researchers lead the project EAS-SEC, which is focused on enterprise application security research and awareness. They have published 3 exhaustive annual award-winning surveys about SAP security.
ERPScan experts have been interviewed by leading media resources and featured in specialized info-sec publications worldwide. These include Reuters, Yahoo, SC Magazine, The Register, CIO, PC World, DarkReading, Heise, and Chinabyte, to name a few.
We have highly qualified experts in staff with experience in many different fields of security, from web applications and mobile/embedded to reverse engineering and ICS/SCADA systems, accumulating their experience to conduct the best SAP security research.


11. ABOUT ERPScan
ERPScan is one of the most respected and credible Business Application Security providers. Founded in 2010, the company operates globally. Named an Emerging vendor in Security by CRN and distinguished by more than 25 other awards, ERPScan is the leading SAP SE partner in discovering and resolving security vulnerabilities. ERPScan consultants work with SAP SE in Walldorf to improve the security of their latest solutions.
ERPScan’s primary mission is to close the gap between technical and business security. We provide solutions to secure ERP systems and business-critical applications from both cyber attacks and internal fraud. Our clients are usually large enterprises, Fortune 2000 companies, and managed service providers whose requirements are to actively monitor and manage the security of vast SAP landscapes on a global scale.
Our flagship product is ERPScan Security Monitoring Suite for SAP. This multi award-winning innovative software is the only solution on the market certified by SAP SE covering all tiers of SAP security: vulnerability assessment, source code review, and Segregation of Duties. The largest companies from diverse industries like oil and gas, banking, retail, even nuclear power installations as well as consulting companies have successfully deployed the software. ERPScan Security Monitoring Suite for SAP is specifically designed for enterprises to continuously monitor changes in multiple SAP systems. It generates and analyzes trends in user friendly dashboards, manages risks, tasks, and can export results to external systems. These features enable central management of SAP system security with minimal time and effort.
We follow the sun and function in two hubs located in the Netherlands and the US to operate local offices and partner network spanning 20+ countries around the globe. This enables monitoring cyber threats in real time and providing agile customer support.

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