CVE-2021-35651
📋 TL;DR
This vulnerability in Oracle Essbase Administration Services allows authenticated attackers with low privileges to access and modify sensitive data via HTTP. It affects Essbase Administration Services console in versions prior to 11.1.2.4.046 and 21.3, potentially impacting other connected products.
💻 Affected Systems
- Oracle Essbase Administration Services
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of all Essbase Administration Services data including unauthorized access to critical information and ability to modify or delete data across connected systems.
Likely Case
Unauthorized access to sensitive business intelligence data and potential data manipulation within Essbase Administration Services.
If Mitigated
Limited impact if proper network segmentation and access controls prevent low-privileged users from reaching vulnerable endpoints.
🎯 Exploit Status
Oracle describes as 'easily exploitable' with low attack complexity. Requires authenticated access but only low privileges needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 11.1.2.4.046 or 21.3 and later
Vendor Advisory: https://www.oracle.com/security-alerts/cpuoct2021.html
Restart Required: Yes
Instructions:
1. Download patches from Oracle Support. 2. Apply Critical Patch Update for October 2021. 3. Restart Essbase Administration Services. 4. Verify patch application via version check.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Essbase Administration Services to only trusted administrative networks
Privilege Reduction
allReview and minimize low-privileged user accounts with access to EAS Console
🧯 If You Can't Patch
- Implement strict network access controls to limit HTTP access to EAS Console
- Monitor for unusual access patterns from low-privileged accounts to EAS endpoints
🔍 How to Verify
Check if Vulnerable:
Check Essbase Administration Services version via EAS Console interface or configuration filesCheck Version:
Check EAS Console version in web interface or review installation logsVerify Fix Applied:
Verify version is 11.1.2.4.046 or higher, or 21.3 or higher after patching📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to EAS Console from low-privileged accounts
- Multiple failed authentication attempts followed by successful access
Network Indicators:
- HTTP traffic to EAS Console endpoints from unexpected sources
- Unusual data extraction patterns
SIEM Query:
source="essbase" AND (event="unauthorized_access" OR event="data_access" FROM user_role="low_privilege")