CVE-2021-35536
📋 TL;DR
This vulnerability in Oracle Deal Management allows authenticated attackers with low privileges to perform unauthorized data manipulation and access sensitive information via HTTP requests. It affects Oracle E-Business Suite versions 12.1.1 through 12.1.3. Attackers can create, delete, or modify critical data and access confidential information.
💻 Affected Systems
- Oracle E-Business Suite - Deal Management
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of Oracle Deal Management data including unauthorized access to all sensitive information and ability to manipulate critical business data, potentially leading to data integrity loss, financial fraud, or business disruption.
Likely Case
Unauthorized data access and manipulation by authenticated users with low privileges, potentially leading to data breaches, unauthorized transactions, or data corruption within the Deal Management module.
If Mitigated
Limited impact due to network segmentation, strong access controls, and monitoring, with potential detection of unauthorized access attempts before significant damage occurs.
🎯 Exploit Status
Oracle describes it as 'easily exploitable' requiring only low privileged network access via HTTP. No public exploit code is known as of the advisory date.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply Oracle Critical Patch Update October 2021 or later
Vendor Advisory: https://www.oracle.com/security-alerts/cpuoct2021.html
Restart Required: Yes
Instructions:
1. Download the October 2021 Critical Patch Update from Oracle Support. 2. Apply the patch to affected Oracle E-Business Suite instances. 3. Restart the application services. 4. Test functionality after patching.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Oracle Deal Management to only trusted IP addresses and networks
Privilege Reduction
allReview and minimize low-privileged user accounts with access to Deal Management
🧯 If You Can't Patch
- Implement strict network access controls to limit HTTP access to Oracle Deal Management
- Enhance monitoring and logging for unauthorized data access or modification attempts
🔍 How to Verify
Check if Vulnerable:
Check Oracle E-Business Suite version and verify if Deal Management component is installed and running versions 12.1.1-12.1.3Check Version:
Check Oracle E-Business Suite version through application administration interface or database queries specific to your deploymentVerify Fix Applied:
Verify that October 2021 Critical Patch Update has been applied and test that unauthorized data access/manipulation is no longer possible📡 Detection & Monitoring
Log Indicators:
- Unusual data access patterns in Deal Management logs
- Multiple failed authorization attempts followed by successful data access
- Unexpected data creation, modification, or deletion events
Network Indicators:
- Unusual HTTP traffic patterns to Deal Management endpoints
- Requests from unexpected IP addresses or user accounts
SIEM Query:
Search for: (source="oracle-ebs" AND (event_type="data_access" OR event_type="data_modification") AND user_privilege="low") OR (http_request_to="/deal_management/*" AND status_code=200 AND user="low_privilege_account")