CVE-2025-36119
📋 TL;DR
CVE-2025-36119 is a web session hijacking vulnerability in IBM Digital Certificate Manager for i (DCM) that allows authenticated non-administrator users to escalate privileges and perform administrative actions. This affects IBM i operating systems versions 7.3 through 7.6. Attackers can hijack web sessions to gain unauthorized administrative access to certificate management functions.
💻 Affected Systems
- IBM Digital Certificate Manager for i (DCM)
📦 What is this software?
I by Ibm
I by Ibm
I by Ibm
I by Ibm
⚠️ Risk & Real-World Impact
Worst Case
An attacker gains full administrative control over DCM, allowing them to issue fraudulent certificates, revoke legitimate certificates, or compromise certificate-based authentication systems across the enterprise.
Likely Case
An authenticated user with malicious intent escalates privileges to perform unauthorized certificate operations, potentially disrupting services or enabling further attacks.
If Mitigated
With proper access controls and monitoring, impact is limited to isolated certificate management issues that can be quickly detected and remediated.
🎯 Exploit Status
Exploitation requires an authenticated user session and knowledge of session hijacking techniques. No public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply IBM i PTF Group SF99738 Level 16 or later
Vendor Advisory: https://www.ibm.com/support/pages/node/7241008
Restart Required: Yes
Instructions:
1. Download and apply IBM i PTF Group SF99738 Level 16 or later. 2. Restart affected IBM i systems. 3. Verify DCM functionality post-patch.
🔧 Temporary Workarounds
Restrict DCM Access
allLimit access to DCM web interface to only authorized administrators using network segmentation or access control lists.
Session Timeout Reduction
allConfigure shorter session timeout values for DCM web sessions to reduce window for session hijacking.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate DCM from general user networks.
- Enforce multi-factor authentication for all DCM administrative access and monitor for unusual privilege escalation attempts.
🔍 How to Verify
Check if Vulnerable:
Check IBM i version and PTF level: DSPPTF LICPGM(5770SS1) SELECT(*CURRENT) OUTPUT(*PRINT). Verify if PTF Group SF99738 Level 16 or later is installed.Check Version:
DSPPTF LICPGM(5770SS1) SELECT(*CURRENT)Verify Fix Applied:
Confirm PTF Group SF99738 Level 16 or later is applied and active. Test DCM functionality to ensure no regression issues.📡 Detection & Monitoring
Log Indicators:
- Unusual privilege escalation events in DCM audit logs
- Multiple failed authentication attempts followed by successful administrative actions from non-admin users
- Session ID anomalies or reuse patterns
Network Indicators:
- Unusual traffic patterns to DCM web interface from non-admin IP addresses
- Session cookie manipulation attempts
SIEM Query:
source="ibm_i_dcm" AND (event_type="privilege_escalation" OR user_role_change="admin")