CVE-2021-33705
📋 TL;DR
CVE-2021-33705 is a Server-Side Request Forgery (SSRF) vulnerability in SAP NetWeaver Portal's Iviews Editor component that allows unauthenticated attackers to craft malicious URLs. When clicked by users, these URLs can trigger requests to internal or external servers, potentially accessing or modifying data accessible from the Portal. This affects SAP NetWeaver Portal versions 7.10 through 7.50.
💻 Affected Systems
- SAP NetWeaver Portal
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access sensitive internal systems, exfiltrate data, or perform internal network reconnaissance leading to lateral movement and data compromise.
Likely Case
Attackers exploit user trust to make unauthorized requests to internal services, potentially accessing portal-accessible data or internal APIs.
If Mitigated
With proper network segmentation and user awareness, impact is limited to specific isolated systems accessible from the portal.
🎯 Exploit Status
Exploitation requires user interaction but is technically simple; public exploit details available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply SAP Security Note 3074844
Vendor Advisory: https://launchpad.support.sap.com/#/notes/3074844
Restart Required: Yes
Instructions:
1. Download and apply SAP Security Note 3074844. 2. Restart affected SAP systems. 3. Verify patch application via transaction SNOTE.
🔧 Temporary Workarounds
Restrict Iviews Editor Access
allLimit access to Iviews Editor component to trusted users only via SAP authorization controls.
Network Segmentation
allImplement network controls to restrict outbound connections from SAP Portal servers.
🧯 If You Can't Patch
- Implement strict user awareness training about clicking untrusted URLs
- Deploy web application firewall (WAF) rules to detect and block SSRF patterns
🔍 How to Verify
Check if Vulnerable:
Check if SAP NetWeaver Portal version is 7.10-7.50 and Iviews Editor component is enabled.Check Version:
Transaction SM51 or SM50 to check SAP system versionVerify Fix Applied:
Verify SAP Security Note 3074844 is applied via transaction SNOTE.📡 Detection & Monitoring
Log Indicators:
- Unusual outbound HTTP requests from SAP Portal servers
- Multiple failed SSRF attempts in web server logs
Network Indicators:
- Unexpected outbound connections from SAP Portal to internal services
- HTTP requests with crafted URLs containing internal IPs
SIEM Query:
source="sap_portal" AND (url CONTAINS "localhost" OR url CONTAINS "127.0.0.1" OR url CONTAINS "internal")🔗 References
- http://packetstormsecurity.com/files/165743/SAP-Enterprise-Portal-iviewCatcherEditor-Server-Side-Request-Forgery.html
- http://seclists.org/fulldisclosure/2022/Jan/72
- https://launchpad.support.sap.com/#/notes/3074844
- https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=582222806
- http://packetstormsecurity.com/files/165743/SAP-Enterprise-Portal-iviewCatcherEditor-Server-Side-Request-Forgery.html
- http://seclists.org/fulldisclosure/2022/Jan/72
- https://launchpad.support.sap.com/#/notes/3074844
- https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=582222806
