Security Vulnerability Report
中文
CVE-2026-4434 CVSS 8.1 HIGH

CVE-2026-4434

Published: 2026-03-20 13:16:13
Last Modified: 2026-03-30 15:23:52

Description

Improper certificate validation in the PAM propagation WinRM connections allows a network attacker to perform a man-in-the-middle attack via disabled TLS certificate verification.

CVSS Details

CVSS Score
8.1
Severity
HIGH
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Configurations (Affected Products)

cpe:2.3:a:devolutions:devolutions_server:*:*:*:*:*:*:*:* - VULNERABLE
Devolutions PAM (具体受影响版本请参考官方公告 DEVO-2026-0005)

PoC / Exploit Code

⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
import winrm # This script demonstrates the vulnerability scenario where TLS certificate validation is disabled. # This is insecure and should only be used for educational/testing purposes against authorized targets. def vulnerable_winrm_connection(target_host, username, password): # Exploit: Disable server certificate verification session = winrm.Session( target_host, auth=(username, password), server_cert_validation='ignore' # VULNERABILITY: Disabled TLS certificate verification ) # Run a command result = session.run_cmd('hostname', []) print(f"StdOut: {result.std_out.decode()}") print(f"StdErr: {result.std_err.decode()}") if __name__ == "__main__": # Example usage (replace with actual target details during pentest) # vulnerable_winrm_connection('https://target-pam-server:5986/wsman', 'admin', 'password') pass

References

Raw JSON Data

JSON
{"cve": {"id": "CVE-2026-4434", "sourceIdentifier": "[email protected]", "published": "2026-03-20T13:16:13.043", "lastModified": "2026-03-30T15:23:51.527", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper certificate validation in the PAM propagation WinRM connections\n allows a network attacker to perform a man-in-the-middle attack via \ndisabled TLS certificate verification."}, {"lang": "es", "value": "La validación de certificado incorrecta en las conexiones WinRM de propagación de PAM permite a un atacante de red realizar un ataque man-in-the-middle a través de la verificación de certificado TLS deshabilitada."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.2, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-295"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:devolutions:devolutions_server:*:*:*:*:*:*:*:*", "versionEndExcluding": "2026.1.6.0", "matchCriteriaId": "53FC3C38-3A6C-4AE1-B2CA-10B238EE6BE1"}]}]}], "references": [{"url": "https://devolutions.net/security/advisories/DEVO-2026-0005/", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}