SAP Mobile Platform version 3.0 suffers from an XXE injection vulnerability. The problem is caused by a program error due to the incorrect use of an XML parser (/mobiliser servlet). 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.
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ERPSCAN Research Advisory [ERPSCAN-15-011] SAP Mobile Platform 3.0 - XXE
Application: SAP Mobile Platform 3.0
Versions Affected: SAP Mobile Platform 3.0, probably others
Vendor URL: http://SAP.com
Bugs: XML eXternal Entity
Sent: 29.12.2014
Reported: 29.12.2014
Vendor response: 30.12.2014
Date of Public Advisory: 18.06.2015
Reference: SAP Security Note 2125513
Author: Vahagn Vardanyan (ERPScan)
Description
1. ADVISORY INFORMATION
Title: SAP Mobile Platform 3.0 XXE
Advisory ID: [ERPSCAN-15-011]
Risk: High
Advisory URL:
http://erpscan.com/advisories/erpscan-15-011-sap-mobile-platform-xxe/
Date published: 15.03.2015
Vendors contacted: SAP
2. VULNERABILITY INFORMATION
Class: XML External Entity [CWE-611]
Impact: XML external entity, information disclosure, denial of service
Remotely Exploitable: Yes
Locally Exploitable: No
3. VULNERABILITY DESCRIPTION
The problem is caused by a program error in SAP Mobile Platform 3.0 due
to the incorrect use of an XML parser (/mobiliser servlet).
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 Mobile Platform 3.0
Other versions are probably affected too, but they were not checked.
5. SOLUTIONS AND WORKAROUNDS
To correct this vulnerability, install SAP Security Note 2125513.
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: 29.12.2014
Reported: 29.12.2014
Vendor response: 30.12.2014
Date of Public Advisory: 18.06.2015
9. REFERENCES
http://erpscan.com/advisories/erpscan-15-011-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
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