CVE-2026-33779

import requests import urllib3 # Suppress only the single warning from urllib3 needed. urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning) def simulate_vulnerable_connection(target_url): """ Proof of Concept for CVE-2026-33779 This script simulates the behavior of a device that does not properly verify the server's certificate chain, allowing a MITM attack. """ print(f"[*] Attempting to connect to {target_url}...") try: # In a real scenario, the attacker intercepts this traffic. # The vulnerable device (client) accepts a self-signed or invalid cert. # verify=False represents the lack of proper certificate validation. response = requests.get(target_url, verify=False, timeout=10) print(f"[+] Connection Successful (Status: {response.status_code})") print("[!] Vulnerability Confirmed: Certificate validation bypassed.") print("[!] Sensitive data (credentials, configs) could be intercepted now.") except requests.exceptions.SSLError: print("[-] Connection Failed: SSL Verification enforced (Secure behavior).") except Exception as e: print(f"[-] Connection Error: {e}") if __name__ == "__main__": # Example target representing the Security Director Cloud API endpoint target = "https://srx-security-director-api.example.com/v1/connect" simulate_vulnerable_connection(target)

{"cve": {"id": "CVE-2026-33779", "sourceIdentifier": "[email protected]", "published": "2026-04-09T22:16:26.720", "lastModified": "2026-04-17T17:21:52.403", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "An Improper Following of a Certificate's Chain of Trust vulnerability in J-Web of Juniper Networks Junos OS on SRX Series allows a PITM to intercept the communication of the device and get access to confidential information and potentially modify it.\n\nWhen an SRX device is provisioned to connect to Security Director (SD) cloud, it doesn't perform sufficient verification of the received server certificate. This allows a PITM to intercept the communication between the SRX and SD cloud and access credentials and other sensitive information.\n\nThis issue affects Junos OS:\n * all versions before 22.4R3-S9,\n * 23.2 versions before 23.2R2-S6,\n * 23.4 versions before 23.4R2-S7,\n * 24.2 versions before 24.2R2-S3,\n * 24.4 versions before 24.4R2-S2,\n * 25.2 versions before 25.2R1-S2, 25.2R2."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/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:M/U:X", "baseScore": 8.3, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "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": "MODERATE", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.2, "impactScore": 4.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-296"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*", "versionEndExcluding": "22.4", "matchCriteriaId": "57F66641-003B-49D6-A9B9-AB300CFE3C93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:-:*:*:*:*:*:*", "matchCriteriaId": "1379EF30-AF04-4F98-8328-52A631F24737"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r1:*:*:*:*:*:*", "matchCriteriaId": "28E42A41-7965-456B-B0AF-9D3229CE4D4C"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r1-s1:*:*:*:*:*:*", "matchCriteriaId": "CB1A77D6-D3AD-481B-979C-8F778530B175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r1-s2:*:*:*:*:*:*", "matchCriteriaId": "3A064B6B-A99B-4D8D-A62D-B00C7870BC30"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r2:*:*:*:*:*:*", "matchCriteriaId": "40813417-A938-4F74-A419-8C5188A35486"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r2-s1:*:*:*:*:*:*", "matchCriteriaId": "7FC1BA1A-DF0E-4B15-86BA-24C60E546732"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r2-s2:*:*:*:*:*:*", "matchCriteriaId": "EBB967BF-3495-476D-839A-9DBFCBE69F91"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r3:*:*:*:*:*:*", "matchCriteriaId": "7E5688D6-DCA4-4550-9CD1-A3D792252129"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r3-s1:*:*:*:*:*:*", "matchCriteriaId": "8494546C-00EA-49B6-B6FA-FDE42CA5B1FA"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r3-s2:*:*:*:*:*:*", "matchCriteriaId": "8BB98579-FA33-4E41-A162-A46E9709FBD3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:juniper:junos:22.4:r3-s3:*:*:*:*:*:*", "matchCriteriaId": "08E2562F ... 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