{"api_version":"1","generated_at":"2026-04-23T11:32:19+00:00","cve":"CVE-2018-0155","urls":{"html":"https://cve.report/CVE-2018-0155","api":"https://cve.report/api/cve/CVE-2018-0155.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2018-0155","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-0155"},"summary":{"title":"CVE-2018-0155","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.","state":"PUBLIC","assigner":"psirt@cisco.com","published_at":"2018-03-28 22:29:00","updated_at":"2020-09-04 18:24:00"},"problem_types":["CWE-755"],"metrics":[],"references":[{"url":"https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05","name":"https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05","refsource":"MISC","tags":["Third Party Advisory","US Government Resource"],"title":"Rockwell Automation Stratix Industrial Managed Ethernet Switch | ICS-CERT","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.securityfocus.com/bid/103565","name":"103565","refsource":"BID","tags":["Third Party Advisory","VDB Entry"],"title":"Cisco IOS and IOS XE Software CVE-2018-0155 Denial of Service Vulnerability","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-bfd","name":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-bfd","refsource":"CONFIRM","tags":["Vendor Advisory"],"title":"Cisco IOS and IOS XE Software Bidirectional Forwarding Detection Denial of Service Vulnerability","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.securitytracker.com/id/1040587","name":"1040587","refsource":"SECTRACK","tags":["Third Party Advisory","VDB Entry"],"title":"Cisco Catalyst 4500 and 4500-X Series Switches Bidirectional Forwarding Detection Error Handling Bug Lets Remote Users Cause the Target 'iosd' Service to Crash - SecurityTracker","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-0155","name":"CVE Program 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4500 Series Switches and Cisco Catalyst 4500-X Series Switches","vulnerabilityName":"Cisco Catalyst Bidirectional Forwarding Detection Denial-of-Service Vulnerability","dateAdded":"2022-03-03","shortDescription":"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.","requiredAction":"Apply updates per vendor instructions.","dueDate":"2022-03-17","knownRansomwareCampaignUse":"Unknown","notes":"https://nvd.nist.gov/vuln/detail/CVE-2018-0155","cwes":"CWE-388","catalogVersion":"2026.04.22","updated_at":"2026-04-22 20:03:10"},"epss":{"cve_year":"2018","cve_id":"155","cve":"CVE-2018-0155","epss":"0.145030000","percentile":"0.944810000","score_date":"2026-04-22","updated_at":"2026-04-23 00:03:16"},"legacy_qids":[{"cve":"CVE-2018-0155","qid":"590339","title":"Rockwell Automation Stratix Industrial Managed Ethernet Switch Multiple Vulnerabilities (ICSA-18-107-05)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"psirt@cisco.com","ID":"CVE-2018-0155","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Cisco IOS and IOS XE","version":{"version_data":[{"version_value":"Cisco IOS and IOS XE"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"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."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-388"}]}]},"references":{"reference_data":[{"name":"1040587","refsource":"SECTRACK","url":"http://www.securitytracker.com/id/1040587"},{"name":"103565","refsource":"BID","url":"http://www.securityfocus.com/bid/103565"},{"name":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-bfd","refsource":"CONFIRM","url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-bfd"},{"name":"https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05","refsource":"MISC","url":"https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05"}]}},"nvd":{"publishedDate":"2018-03-28 22:29:00","lastModifiedDate":"2020-09-04 18:24:00","problem_types":["CWE-755"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":8.6,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":4},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:C","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"COMPLETE","baseScore":7.8},"severity":"HIGH","exploitabilityScore":10,"impactScore":6.9,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:cisco:ios:3.6\\(2\\)e:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:cisco:ios_xe:3.6\\(2\\)e:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:cisco:catalyst_4500-x_series_switches_\\(k10\\):-:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:cisco:catalyst_4500_supervisor_engine_6-e_\\(k5\\):-:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:cisco:catalyst_4500_supervisor_engine_6l-e_\\(k10\\):-:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:cisco:catalyst_4500_supervisor_engine_7-e_\\(k10\\):-:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:cisco:catalyst_4500_supervisor_engine_7l-e_\\(k10\\):-:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:cisco:catalyst_4500e_supervisor_engine_8-e_\\(k10\\):-:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:cisco:catalyst_4500e_supervisor_engine_8l-e_\\(k10\\):-:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:cisco:catalyst_4500e_supervisor_engine_9-e_\\(k10\\):-:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:cisco:catalyst_4900m_switch_\\(k5\\):-:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:cisco:catalyst_4948e_ethernet_switch_\\(k5\\):-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]},{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:cisco:ios:3.6\\(2\\)e:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:cisco:ios_xe:3.6\\(2\\)e:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:rockwellautomation:allen-bradley_stratix_8300_industrial_managed_ethernet_switch:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]}]}},"legacy_mitre":{"record":{"CveYear":"2018","CveId":"155","Ordinal":"114968","Title":"CVE-2018-0155","CVE":"CVE-2018-0155","Year":"2018"},"notes":[{"CveYear":"2018","CveId":"155","Ordinal":"1","NoteData":"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.","Type":"Description","Title":null},{"CveYear":"2018","CveId":"155","Ordinal":"2","NoteData":"2018-03-28","Type":"Other","Title":"Published"},{"CveYear":"2018","CveId":"155","Ordinal":"3","NoteData":"2018-04-19","Type":"Other","Title":"Modified"}]}}}