SAP NetWeaver AS Java NavigationURLTester - XSS vulnerability

Application: SAP NetWeaver **Versions Affected:**SAP NetWeaver 7.4 Vendor URL: SAP **Bugs:**XSS vulnerability **Reported:**20.10.2015 **Vendor response:**21.10.2015 **Date of Public Advisory:**08.03.2016 **Reference:**SAP Security Note 2238375 Author: Vahagn Vardanyan (ERPScan)

VULNERABILITY INFORMATION

Class: XSS
Impact: leakage of sensitive data
Remotely Exploitable: Yes
Locally Exploitable: No
CVE-2016-3975

CVSS Information
CVSS Base Score v3: 6.1 / 10
CVSS Base Vector:

Description
Anonymous attacker can use a special HTTP request to hijack session data of administrators or users of a web resource.

Business risk
An attacker can use a Cross-site scripting vulnerability to inject a malicious script into a web page. Reflected XSS feature is the necessity of tricking a user from attackers’ side – they must make user follow a specially-crafted link.
Speaking about a stored XSS, a malicious script is injected and permanently stored in a web page body, this way the user is attacked without performing any actions.
Malicious script can access all cookies, session tokens, and other critical information stored by a browser and used for interaction with the site. An attacker can gain access to user’s session and learn business-critical information, in some cases it is possible to get control over this information. Also, XSS can be used for unauthorized modifying of displayed site content.

VULNERABLE PACKAGES

SAP NetWeaver AS JAVA 7.1 – 7.5
Other versions are probably affected too, but they were not checked.

SOLUTIONS AND WORKAROUNDS

To correct this vulnerability, install SAP Security Note 2238375

TECHNICAL DESCRIPTION

Cross-site scripting (XSS) vulnerability in SAP NetWeaver AS Java allows remote attackers to inject arbitrary web script or HTML via unspecified vectors related to NavigationURLTester.

PoC

http://SAP:50000/irj/servlet/prt/portal/prteventname/XXX/prtroot/ com.sapportals.navigation.testComponent.NavigationURLTester? navigationTarget=ROLES%3a%2f%2fportal_content%2fadministrator%2fsuper_admin% 2fsuper_admin_role%2fcom.sap.portal. system_administration%2fcom.sap.portal.system_admin_ws%2fcom.sap.portal. transport%2fcom.sap.portal.transport_packages%2fcom.sap. portal.wd_admin_studio_export<img%20src%3da%20onerror%3dalert(‘ERPSCAN’) >&portalAlias=& navMode=&queryString=&getNavigationURL=getNavigationURL