CVE-2021-2106
📋 TL;DR
This vulnerability in Oracle Customer Interaction History 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, requiring human interaction from someone other than the attacker to exploit.
💻 Affected Systems
- Oracle E-Business Suite - Customer Interaction History
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of all Oracle Customer Interaction History data including unauthorized access to critical information and ability to modify or delete data, potentially impacting other connected systems.
Likely Case
Unauthorized access to sensitive customer interaction data and partial ability to modify records, leading to data breaches and integrity issues.
If Mitigated
Limited impact with proper network segmentation and access controls, though vulnerability remains present in the application.
🎯 Exploit Status
CVSS indicates easily exploitable (AC:L) with no privileges required (PR:N) but requires user interaction (UI:R).
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply Critical Patch Update for January 2021 or later
Vendor Advisory: https://www.oracle.com/security-alerts/cpujan2021.html
Restart Required: Yes
Instructions:
1. Download Critical Patch Update from Oracle Support. 2. Apply patch to affected Oracle E-Business Suite instances. 3. Restart application services. 4. Test functionality.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Oracle Customer Interaction History to trusted IPs only
Web Application Firewall
allDeploy WAF with rules to detect and block exploitation attempts
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure
- Monitor for suspicious activity and implement compensating controls
🔍 How to Verify
Check if Vulnerable:
Check Oracle E-Business Suite version and compare against affected versions. Review patch history for January 2021 Critical Patch Update.Check Version:
Check Oracle E-Business Suite version through application administration interface or database queries specific to your deployment.Verify Fix Applied:
Verify Critical Patch Update for January 2021 is applied and check version is no longer in vulnerable range.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to Outcome-Result endpoints
- Unauthorized access attempts to customer interaction data
Network Indicators:
- HTTP traffic to Oracle Customer Interaction History from unexpected sources
- Patterns matching exploitation attempts
SIEM Query:
source="oracle-ebs" AND (uri="*Outcome-Result*" OR uri="*customer-interaction*" OR uri="*history*") AND status>=400