CVE-2025-36136

# CVE-2025-36136 PoC - IBM Db2 Local DoS via Monitor Script # This PoC demonstrates how local user can trigger the monitor script issue # Note: Actual exploitation requires specific conditions and DB2 environment import subprocess import time import os def check_db2_instance_status(): """Check if DB2 instance is in problematic state""" try: # Check DB2 instance status using db2pd or similar tool result = subprocess.run( ['db2pd', '-instances'], capture_output=True, text=True, timeout=10 ) return result.stdout except Exception as e: return f"Error checking instance: {e}" def trigger_monitor_script_issue(): """ Trigger the monitor script condition that causes incorrect 'instance still starting' detection Note: This is a conceptual PoC. Actual exploitation requires: 1. Local access to the DB2 server 2. Specific DB2 version (11.5.0-11.5.9 or 12.1.0-12.1.3) 3. Ability to manipulate instance state """ print("[*] CVE-2025-36136 - IBM Db2 Monitor Script DoS PoC") print("[*] Target: IBM Db2 11.5.x / 12.1.x") # Step 1: Verify DB2 installation print("\n[1] Checking DB2 installation...") instance_info = check_db2_instance_status() print(f"Instance info: {instance_info}") # Step 2: Attempt to trigger the condition print("\n[2] Attempting to trigger monitor script issue...") print("[*] This requires specific conditions to be met:") print(" - DB2 instance in transitional state") print(" - Monitor script running with specific timing") # Step 3: Monitor for denial of service print("\n[3] Monitoring for DoS condition...") print("[*] If monitor script incorrectly detects 'still starting':") print(" - Database may become unresponsive") print(" - Connection attempts may fail") print(" - Service availability is compromised") return True if __name__ == "__main__": trigger_monitor_script_issue()

{"cve": {"id": "CVE-2025-36136", "sourceIdentifier": "[email protected]", "published": "2025-11-07T19:16:24.557", "lastModified": "2025-11-19T16:27:55.993", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.3 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow a local user to cause a denial of service due to the database monitor script incorrectly detecting that the instance is still starting under specific conditions."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.1, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.4, "impactScore": 3.6}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-770"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:ibm:db2:*:*:*:*:*:linux:*:*", "versionStartIncluding": "11.5.0", "versionEndIncluding": "11.5.9", "matchCriteriaId": "ECAF5576-B4A5-4DB7-94F0-942F656F0461"}, {"vulnerable": true, "criteria": "cpe:2.3:a:ibm:db2:*:*:*:*:*:unix:*:*", "versionStartIncluding": "11.5.0", "versionEndIncluding": "11.5.9", "matchCriteriaId": "B1E165E8-F11B-4F13-B54A-90D29CA2ABF8"}, {"vulnerable": true, "criteria": "cpe:2.3:a:ibm:db2:*:*:*:*:*:windows:*:*", "versionStartIncluding": "11.5.0", "versionEndIncluding": "11.5.9", "matchCriteriaId": "727E2804-2D3D-4C31-A3E5-F99107D02A27"}, {"vulnerable": true, "criteria": "cpe:2.3:a:ibm:db2:*:*:*:*:*:linux:*:*", "versionStartIncluding": "12.1.0", "versionEndIncluding": "12.1.3", "matchCriteriaId": "2AA1764B-CD82-4B33-B85B-27CA2F7C0ED5"}, {"vulnerable": true, "criteria": "cpe:2.3:a:ibm:db2:*:*:*:*:*:unix:*:*", "versionStartIncluding": "12.1.0", "versionEndIncluding": "12.1.3", "matchCriteriaId": "8F63D92C-AC19-4FB0-A605-08DC01875E7B"}, {"vulnerable": true, "criteria": "cpe:2.3:a:ibm:db2:*:*:*:*:*:windows:*:*", "versionStartIncluding": "12.1.0", "versionEndIncluding": "12.1.3", "matchCriteriaId": "E28DCDF3-EF5B-47D6-BD38-C98334B67BE4"}]}]}], "references": [{"url": "https://www.ibm.com/support/pages/node/7250485", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}