CVE-2021-35570
📋 TL;DR
This vulnerability in Oracle Mobile Field Service 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 12.1.1-12.1.3 and 12.2.3-12.2.10. Attackers can create, delete, or modify critical data without proper authorization.
💻 Affected Systems
- Oracle Mobile Field Service
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of all Oracle Mobile Field Service data including unauthorized access to critical business information and unauthorized modification of all accessible data.
Likely Case
Unauthorized access to sensitive field service data and manipulation of service records, potentially disrupting business operations.
If Mitigated
Limited impact if proper network segmentation, least privilege access controls, and monitoring are implemented.
🎯 Exploit Status
Requires authenticated access but with low privileges. CVSS indicates 'easily exploitable' via network access.
🛠️ 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 appropriate Critical Patch Update from Oracle Support. 2. Apply the patch following Oracle's patching procedures. 3. Restart affected services. 4. Test functionality before deploying to production.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Oracle Mobile Field Service to only trusted IP addresses and networks.
Privilege Reduction
allReview and minimize user privileges to only necessary functions within the Mobile Field Service application.
🧯 If You Can't Patch
- Implement strict network access controls and firewall rules to limit HTTP access to the Mobile Field Service interface.
- Enable detailed logging and monitoring for unauthorized access attempts and data modification activities.
🔍 How to Verify
Check if Vulnerable:
Check Oracle E-Business Suite version and Mobile Field Service component version against affected ranges.Check Version:
Check Oracle application version through Oracle application administration tools or database queries specific to your installation.Verify Fix Applied:
Verify that the October 2021 Critical Patch Update or later has been applied successfully.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to Admin UI endpoints
- Multiple failed authentication attempts followed by successful low-privilege access
- Unexpected data modification events in audit logs
Network Indicators:
- HTTP traffic to Mobile Field Service Admin UI from unexpected sources
- Patterns of data access/modification requests from low-privilege accounts
SIEM Query:
source="oracle-ebs" AND (event_type="data_modification" OR event_type="unauthorized_access") AND user_privilege="low" AND component="mobile_field_service"