CVE-2021-2091
📋 TL;DR
This vulnerability in Oracle Scripting (part of Oracle E-Business Suite) allows unauthenticated attackers to access and modify sensitive data via HTTP. It affects Oracle E-Business Suite versions 12.1.1-12.1.3 and 12.2.3-12.2.10. Successful exploitation requires human interaction (like clicking a link) but can impact other connected systems.
💻 Affected Systems
- Oracle E-Business Suite
📦 What is this software?
Scripting by Oracle
Scripting by Oracle
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of all Oracle Scripting accessible data including unauthorized access to critical information and unauthorized data modification across connected systems.
Likely Case
Unauthorized access to sensitive business data and partial data manipulation within Oracle Scripting components.
If Mitigated
Limited impact with proper network segmentation, strong access controls, and user awareness training about suspicious links.
🎯 Exploit Status
Requires human interaction (UI:R) meaning attackers need to trick users into performing an action like clicking a malicious link.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply patches from Oracle Critical Patch Update Advisory - January 2021
Vendor Advisory: https://www.oracle.com/security-alerts/cpujan2021.html
Restart Required: Yes
Instructions:
1. Review Oracle Critical Patch Update Advisory for January 2021. 2. Download appropriate patches for your E-Business Suite version. 3. Apply patches following Oracle's patching procedures. 4. Restart affected services. 5. Test functionality after patching.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Oracle E-Business Suite instances to only trusted sources
User Awareness Training
allTrain users to recognize and avoid suspicious links or interactions with Oracle applications
🧯 If You Can't Patch
- Implement strict network access controls to limit HTTP access to Oracle Scripting components
- Monitor for suspicious activity and implement additional authentication layers for sensitive operations
🔍 How to Verify
Check if Vulnerable:
Check Oracle E-Business Suite version and compare against affected versions (12.1.1-12.1.3 or 12.2.3-12.2.10)Check Version:
Check Oracle E-Business Suite version through application administration interface or database queries specific to your deploymentVerify Fix Applied:
Verify patch application through Oracle's patch management tools and confirm version is no longer in vulnerable range📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to Oracle Scripting endpoints
- Multiple failed access attempts followed by successful unusual requests
- User reports of unexpected application behavior
Network Indicators:
- Unusual HTTP traffic patterns to Oracle E-Business Suite ports
- External IP addresses accessing Oracle Scripting components
SIEM Query:
source="oracle-ebs" AND (http_method="POST" OR http_method="GET") AND uri CONTAINS "/scripting/" AND src_ip NOT IN [trusted_networks]