{
    "id": "CVE-2018-0155",
    "published": "2018-03-28 22:29:00",
    "last_modified": "2026-06-17 01:29:57",
    "cvss_score": "8.6",
    "cvss_severity": "HIGH",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
    "cwe": "CWE-388",
    "description": "A vulnerability in the Bidirectional Forwarding Detection (BFD) offload implementation of Cisco Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches could allow an unauthenticated, remote attacker to cause a crash of the iosd process, causing a denial of service (DoS) condition. The vulnerability is due to insufficient error handling when the BFD header in a BFD packet is incomplete. An attacker could exploit this vulnerability by sending a crafted BFD message to or across an affected switch. A successful exploit could allow the attacker to trigger a reload of the system. This vulnerability affects Catalyst 4500 Supervisor Engine 6-E (K5), Catalyst 4500 Supervisor Engine 6L-E (K10), Catalyst 4500 Supervisor Engine 7-E (K10), Catalyst 4500 Supervisor Engine 7L-E (K10), Catalyst 4500E Supervisor Engine 8-E (K10), Catalyst 4500E Supervisor Engine 8L-E (K10), Catalyst 4500E Supervisor Engine 9-E (K10), Catalyst 4500-X Series Switches (K10), Catalyst 4900M Switch (K5), Catalyst 4948E Ethernet Switch (K5). Cisco Bug IDs: CSCvc40729.",
    "epss_score": "0.07742",
    "epss_percentile": "0.94430",
    "kev": 1,
    "kev_due": "2022-03-17",
    "has_exploit": 0,
    "updated_at": "2026-09-27 18:17:19",
    "priority": {
        "rank": 1,
        "label": "Patch first",
        "why": "On CISA KEV — known exploited in the wild, due 2022-03-17."
    },
    "products": [
        {
            "vendor": "cisco",
            "product": "catalyst_4500_supervisor_engine_6-e_\\(k5\\)"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_4500_supervisor_engine_6l-e_\\(k10\\)"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_4500_supervisor_engine_7-e_\\(k10\\)"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_4500_supervisor_engine_7l-e_\\(k10\\)"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_4500-x_series_switches_\\(k10\\)"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_4500e_supervisor_engine_8-e_\\(k10\\)"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_4500e_supervisor_engine_8l-e_\\(k10\\)"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_4500e_supervisor_engine_9-e_\\(k10\\)"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_4900m_switch_\\(k5\\)"
        },
        {
            "vendor": "cisco",
            "product": "catalyst_4948e_ethernet_switch_\\(k5\\)"
        },
        {
            "vendor": "cisco",
            "product": "ios"
        },
        {
            "vendor": "cisco",
            "product": "ios_xe"
        },
        {
            "vendor": "rockwellautomation",
            "product": "allen-bradley_stratix_8300_industrial_managed_ethernet_switch"
        }
    ],
    "kev_detail": {
        "cve_id": "CVE-2018-0155",
        "date_added": "2022-03-03",
        "due_date": "2022-03-17",
        "vendor": "Cisco",
        "product": "Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches",
        "name": "Cisco Catalyst Bidirectional Forwarding Detection Denial-of-Service Vulnerability",
        "ransomware": 0
    },
    "exploits": [],
    "refs_list": [
        "http://www.securityfocus.com/bid/103565",
        "http://www.securitytracker.com/id/1040587",
        "https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05",
        "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-bfd",
        "http://www.securityfocus.com/bid/103565",
        "http://www.securitytracker.com/id/1040587",
        "https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05",
        "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-bfd",
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0155"
    ]
}