CVE-2021-2062
📋 TL;DR
This vulnerability in Oracle BI Publisher allows authenticated attackers with low privileges to exploit a flaw via HTTP requests that require user interaction. Successful exploitation can lead to unauthorized access to critical data and modification of Oracle BI Publisher data, affecting versions 5.5.0.0.0, 11.1.1.9.0, 12.2.1.3.0, and 12.2.1.4.0.
💻 Affected Systems
- Oracle BI Publisher
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of all Oracle BI Publisher accessible data including unauthorized access to critical information and unauthorized data modification across connected systems.
Likely Case
Unauthorized access to sensitive business intelligence data and reports, potentially leading to data theft or manipulation of published reports.
If Mitigated
Limited impact with proper network segmentation, strong authentication controls, and user interaction monitoring in place.
🎯 Exploit Status
Requires authenticated low-privilege access and user interaction from another person. CVSS indicates easily exploitable with low attack complexity.
🛠️ 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 the appropriate Critical Patch Update from Oracle Support. 2. Apply the patch following Oracle's patching procedures. 3. Restart the Oracle BI Publisher service. 4. Verify the patch was applied successfully.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Oracle BI Publisher to only trusted sources and required users.
Privilege Reduction
allImplement least privilege principle and review user permissions to minimize attack surface.
🧯 If You Can't Patch
- Implement strict network access controls and firewall rules to limit HTTP access to Oracle BI Publisher
- Enhance monitoring and alerting for suspicious user interactions and data access patterns
🔍 How to Verify
Check if Vulnerable:
Check Oracle BI Publisher version via administration console or query the version from the application interface.Check Version:
Check Oracle BI Publisher version through the application's administration interface or configuration files.Verify Fix Applied:
Verify the applied patch version matches or exceeds the Critical Patch Update for January 2021.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to BI Publisher endpoints
- Multiple failed authentication attempts followed by successful low-privilege access
- Unexpected data access or modification patterns
Network Indicators:
- HTTP traffic patterns indicating user interaction exploitation
- Unusual data exfiltration from BI Publisher servers
SIEM Query:
source="oracle_bi_publisher" AND (event_type="data_access" OR event_type="report_modification") AND user_privilege="low" AND success="true"