CVE-2021-35543
📋 TL;DR
This vulnerability in Oracle PeopleSoft Enterprise CC Common Application Objects allows authenticated attackers with low privileges to perform unauthorized data manipulation and access critical information via HTTP. It affects PeopleSoft Enterprise CC Common Application Objects version 9.2, potentially compromising sensitive organizational data.
💻 Affected Systems
- Oracle PeopleSoft Enterprise CC Common Application Objects
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of all PeopleSoft Enterprise CC Common Application Objects data, including unauthorized creation, deletion, modification, and full access to critical business information.
Likely Case
Unauthorized access to sensitive PeopleSoft data and potential data manipulation by authenticated users with low privileges.
If Mitigated
Limited impact if proper access controls, network segmentation, and monitoring are implemented to detect and prevent exploitation attempts.
🎯 Exploit Status
Oracle describes it as 'easily exploitable' and requires only low privileged network access via HTTP. No authentication bypass required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply Oracle Critical Patch Update October 2021
Vendor Advisory: https://www.oracle.com/security-alerts/cpuoct2021.html
Restart Required: Yes
Instructions:
1. Download the appropriate patch from Oracle Support. 2. Apply the October 2021 Critical Patch Update for PeopleSoft. 3. Restart affected PeopleSoft services. 4. Test functionality after patching.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict network access to PeopleSoft systems to only trusted IP addresses and networks
Privilege Reduction
allReview and minimize user privileges in PeopleSoft, especially for the Activity Guide Composer component
🧯 If You Can't Patch
- Implement strict network segmentation and firewall rules to limit access to PeopleSoft systems
- Enhance monitoring and logging for suspicious activity in PeopleSoft logs and network traffic
🔍 How to Verify
Check if Vulnerable:
Check PeopleSoft version and verify if October 2021 Critical Patch Update has been appliedCheck Version:
Check PeopleSoft version through PeopleTools or application administration consoleVerify Fix Applied:
Verify patch installation through PeopleSoft patch management tools and confirm version is updated📡 Detection & Monitoring
Log Indicators:
- Unusual activity in Activity Guide Composer logs
- Multiple failed or suspicious access attempts to PeopleSoft components
- Unauthorized data modification events
Network Indicators:
- Unusual HTTP traffic patterns to PeopleSoft Activity Guide Composer endpoints
- Multiple requests from single low-privilege accounts
SIEM Query:
source="peoplesoft" AND (component="Activity Guide Composer" OR action="modify" OR action="delete") AND user_privilege="low"