CVE-2021-2093
📋 TL;DR
This vulnerability in Oracle Common Applications allows unauthenticated attackers to compromise the system 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 but can lead to unauthorized access to critical data.
💻 Affected Systems
- Oracle E-Business Suite - Oracle Common Applications
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of Oracle Common Applications data including unauthorized access, modification, insertion, or deletion of sensitive information, potentially impacting other connected products.
Likely Case
Unauthorized access to sensitive business data within Oracle Common Applications, potentially leading to data theft or manipulation of CRM user management information.
If Mitigated
Limited impact with proper network segmentation, access controls, and user awareness training to prevent human interaction exploitation.
🎯 Exploit Status
Oracle describes as 'easily exploitable' but requires human interaction. No public exploit code identified in references.
🛠️ 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 post-patch.
🔧 Temporary Workarounds
Network Segmentation
linuxRestrict network access to Oracle Common Applications to trusted sources only
iptables -A INPUT -p tcp --dport 80 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
User Awareness Training
allEducate users about suspicious links and interactions in Oracle applications
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure to trusted IP addresses only
- Deploy web application firewall with rules to detect and block exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check Oracle E-Business Suite version against affected ranges: 12.1.1-12.1.3 or 12.2.3-12.2.10Check Version:
Check Oracle E-Business Suite version through application administration console or database queries specific to your installationVerify Fix Applied:
Verify patch application through Oracle patch management tools and confirm version is no longer in vulnerable range📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to CRM User Management Framework endpoints
- Multiple failed authentication attempts followed by successful access
- Unexpected data access patterns from unauthenticated sources
Network Indicators:
- HTTP traffic to Oracle Common Applications from unexpected sources
- Patterns matching known Oracle E-Business Suite exploitation
SIEM Query:
source="oracle-ebs" AND (http_method="POST" OR http_method="GET") AND uri CONTAINS "/crm/" AND user_agent NOT IN ["trusted_browsers"]