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SAP NetWeaver Portal 7.31 XXE Injection

SAP NetWeaver Portal 7.31 XXE Injection
Posted Jun 18, 2015
Authored by Vahagn Vardanyan

SAP NetWeaver Portal version 7.31 suffers from an XXE injection vulnerability. By default, the parser opens external entities referenced within an XML input, which can then lead to malicious content being parsed. This malicious content can reference internal resources, such as files. These internal resources can be disclosed in the response to the request, or can be used to perform a denial of service attack on the parsing system, rendering the application content temporarily unavailable.

tags | advisory, denial of service, xxe
advisories | CVE-2015-2811
SHA-256 | b46458ceeb29478ddffbd1e176b6e2695088708178f75445d879b1a591dbce9f

SAP NetWeaver Portal 7.31 XXE Injection

Change Mirror Download
ERPSCAN Research Advisory [ERPSCAN-15-006] SAP NetWeaver Portal 
ReportXmlViewer - XXE


Application: SAP NetWeaver Portal 7.31
Versions Affected: SAP NetWeaver Portal 7.31, probably others
Vendor URL: http://SAP.com
Bugs: XXE
Sent: 09.12.2014
Reported: 09.12.2014
Vendor response: 10.12.2014
Date of Public Advisory: 18.06.2015
Reference: SAP Security Note 2111939
Author: Vahagn Vardanyan (ERPScan)


Description


1. ADVISORY INFORMATION
Title: SAP NetWeaver Portal ReportXmlViewer - XXE
Advisory ID: [ERPSCAN-15-006]
Risk: High
Advisory URL:
http://erpscan.com/advisories/erpscan-15-006-sap-netweaver-portal-reportxmlviewer-xxe/
Date published: 15.03.2015
Vendors contacted: SAP


2. VULNERABILITY INFORMATION
Class: XXE [CWE-122]
Impact: XML external entity, information disclosure, denial of service,
role upload, thread reporting
Remotely Exploitable: Yes
Locally Exploitable: No
CVE Name: CVE-2015-2811


3. VULNERABILITY DESCRIPTION
By default, the parser opens external entities referenced within an XML
input, which can then lead to malicious content being parsed.
This malicious content can reference internal resources, such as files.
These internal resources can be disclosed in the response to the
request, or can be used to perform a denial of service attack on the
parsing system, rendering the application content temporarily unavailable.


4. VULNERABLE PACKAGES
SAP NetWeaver Portal 7.31
Other versions are probably affected too, but they were not checked.


5. SOLUTIONS AND WORKAROUNDS
To correct this vulnerability, install SAP Security Note 2111939.


6. AUTHOR
Vahagn Vardanyan (ERPScan)


7. TECHNICAL DESCRIPTION
SAP XML parser validates all incoming XML requests with a user-specified
DTD.


8. REPORT TIMELINE
Sent: 09.12.2014
Reported: 09.12.2014
Vendor response: 10.12.2014
Date of Public Advisory: 18.06.2015


9. REFERENCES
http://erpscan.com/advisories/erpscan-15-006-sap-netweaver-portal-reportxmlviewer-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.

Address USA: 228 Hamilton Avenue, Fl. 3, Palo Alto, CA, 94301
Phone: 650.798.5255
Twitter: @erpscan
Scoop-it: Business Application Security
http://erpscan.com
--

Darya Maenkova

PR manager

<https://www.linkedin.com/company/2217474?trk=ppro_cprof>
<https://twitter.com/erpscan>

<http://erpscan.com/>

------------------------------------------------------------------------

e-mail: d.maenkova@erpscan.com <mailto:d.maenkova@erpscan.com>

address: 228 Hamilton Avenue, Fl. 3, Palo Alto, CA. 94301

phone: 650.798.5255

erpscan.com <http://erpscan.com>

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