CVE-2023-30743
📋 TL;DR
This vulnerability in SAPUI5's sap.m.FormattedText control allows CSS injection due to improper input neutralization. Attackers can block user interaction with applications and potentially conduct phishing attacks to read or modify user information. Affects SAPUI5 versions SAP_UI 750-757 and UI_700 200.
💻 Affected Systems
- SAPUI5
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers conduct successful phishing campaigns to steal sensitive user data or credentials, leading to account compromise and potential data breaches.
Likely Case
Attackers inject malicious CSS to block legitimate user interaction with SAP applications, causing denial of service and user frustration.
If Mitigated
With proper input validation and output encoding, the risk is limited to minor UI disruption that can be quickly remediated.
🎯 Exploit Status
Exploitation requires the attacker to inject CSS into the vulnerable control, which could be achieved through various input vectors.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply SAP Note 3326210
Vendor Advisory: https://launchpad.support.sap.com/#/notes/3326210
Restart Required: Yes
Instructions:
1. Download and apply SAP Note 3326210. 2. Update SAPUI5 to patched versions. 3. Restart affected SAP applications.
🔧 Temporary Workarounds
Input Validation
allImplement strict input validation for all data passed to sap.m.FormattedText control
Output Encoding
allApply proper output encoding for CSS contexts in UI5 applications
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to detect and block CSS injection attempts
- Disable or restrict use of sap.m.FormattedText control in vulnerable applications
🔍 How to Verify
Check if Vulnerable:
Check SAPUI5 version and verify if sap.m.FormattedText control is used with untrusted inputCheck Version:
Check SAP system for UI5 component versions via transaction SE38 or system informationVerify Fix Applied:
Verify SAP Note 3326210 is applied and test sap.m.FormattedText control with CSS injection attempts📡 Detection & Monitoring
Log Indicators:
- Unusual CSS patterns in application logs
- Multiple failed interaction attempts by users
Network Indicators:
- Suspicious CSS payloads in HTTP requests to SAP applications
SIEM Query:
source="sap_app" AND (css_injection OR formattedtext)