ERPSCAN Research Advisory [ERPSCAN-15-016] SAP NetWeaver – Hardcoded credentials


Application: SAP NetWeaver
Versions Affected: SAP NetWeaver AS ABAP, probably others
Vendor URL: http://SAP.com
Bugs: Hardcoded credentials
Sent: 06.03.2014
Reported:                       07.03.2014
Vendor response:                07.03.2014
Date of Public Advisory:        15.06.2015
Reference:                      SAP Security Note 2059659
Author: Rustem Gazizov, Diana Grigorieva (ERPScan)


Description


1. ADVISORY INFORMATION
Title: SAP NetWeaver AS ABAP – Hardcoded Credentials
Advisory ID: [ERPSCAN-15-016]
Risk: High
Advisory URL: http://erpscan.com/advisories/erpscan-15-016-sap-netweaver-hardcoded-credentials/
Date published: 15.06.2015
Vendors contacted: SAP


2. VULNERABILITY INFORMATION
Class: hardcoded credentials [CWE-798]
Impact: read application data; gain privileges / assume identity
Remotely Exploitable: Yes
Locally Exploitable: No


CVSS Information
CVSS Base Score:  3.6 / 10
CVSS Base Vector:
AV : Access Vector (Related exploit range) Network (N)
AC : Access Complexity (Required attack complexity) High (H)
Au : Authentication (Level of authentication needed to exploit) Single (S)
C : Impact to Confidentiality Partial (P)
I : Impact to Integrity Partial (P)
A : Impact to Availability None (N)


3. VULNERABILITY DESCRIPTION
The program code contains a hardcoded username that changes the
system's behavior if the user is authenticated successfully. The user
may obtain additional information that should not be displayed.


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


5. SOLUTIONS AND WORKAROUNDS
To correction this vulnerability, install SAP Security Note 2059659


6. AUTHOR
Rustem Gazizov, Diana Grigorieva (ERPScan)


7. TECHNICAL DESCRIPTION
An attacker can use hardcoded credentials to get unauthorized access
and perform various actions in the system. In addition, it is likely
that the code will be implemented into the system as a backdoor.


The vulnerability is in the LSCT1I13 ABAP program.


61        *       switch to adjust mode
62        WHEN 'XADJ'.
63        CLEAR GV_OK_CODE.
64        CALL FUNCTION 'TOCX_GET_SYSTEM_TYPE' IMPORTING SAP_SYSTEM =
GS_DYN300-SAP_SYSTEM EXCEPTIONS OTHERS = 1.
65
66        IF GS_DYN300-SAP_SYSTEM = 'X' OR SY-UNAME = 'DDIC'.
67        IF GS_DYN300-ADJUST = ' '.
68
69        SELECT * FROM DD02L WHERE TABNAME = GS_DYN300-VIEW AND AS4LOCAL = 'A'.


8. REPORT TIMELINE
Sent: 06.03.2014
Reported:                       07.03.2014
Vendor response:                07.03.2014
Date of Public Advisory:        15.06.2015


9. REFERENCES
http://erpscan.com/advisories/erpscan-15-016-sap-netweaver-hardcoded-credentials/


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+
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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.
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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
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The largest companies from diverse industries like oil and gas,
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