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[ERPSCAN-16-010] SAP NetWeaver AS JAVA – information disclosure vulnerability

Application: SAP NetWeaver AS JAVA
Versions Affected: SAP NetWeaver AS JAVA 7.1 - 7.5
Vendor URL: SAP
Bugs: Information disclosure
Reported: 15.09.2015
Vendor response: 16.09.2015
Date of Public Advisory: 09.02.2016
Reference: SAP Security Note 2256846
Author: Vahagn Vardanyan (ERPScan)

VULNERABILITY INFORMATION
Class: Information disclosure
Impact: Resource consumption
Remotely Exploitable: Yes
Locally Exploitable: No
CVE: CVE-2016-2388

CVSS Information
CVSS Base Score v3: 5.3 / 10
CVSS Base Vector:

AV : Access Vector (Related exploit range) Network (N)
AC : Access Complexity (Required attack complexity) Low (L)
Au : Authentication (Level of authentication needed to exploit) None (N)
C : Impact to Confidentiality Low(N)
I : Impact to Integrity None(N)
A : Impact to Availability None (N)

Description
Anonymous attacker can use a special HTTP request to get information about SAP NetWeaver users.

Business risk
An attacker can use Information disclosure vulnerability to reveal additional information (system data, debugging information, etc) that will help him to learn about a system and to plan other attacks.

VULNERABLE PACKAGES
SAP NetWeaver AS JAVA 7.4, 7.5
Other versions are probably affected too, but they were not checked.

SOLUTIONS AND WORKAROUNDS
To correct this vulnerability, install SAP Security Note 2256846

TECHNICAL DESCRIPTION
An attacker can use an Information disclosure vulnerability to reveal additional information (system data, debugging information, etc) that will help him to learn more about a system and to plan further attacks.

Steps to exploit this vulnerability
1. Open

page on SAP server
2. Press "Choose" button
3. In the opened window press “Search”
You will get a list of SAP users