{"id":"CVE-2018-0155","state":"PUBLISHED","title":"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 ","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.","publishedAt":"2018-03-28T22:00:00.000Z","updatedAt":"2026-01-12T21:52:53.398Z","severity":{"score":8.6,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"cisco","products":["n/a Cisco IOS and IOS XE"],"affected":[{"vendor":"n/a","product":"Cisco IOS and IOS XE","versions":[{"version":"Cisco IOS and IOS XE","status":"affected"}]}],"references":["http://www.securitytracker.com/id/1040587","http://www.securityfocus.com/bid/103565","https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-bfd","https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05","https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0155"],"weaknesses":["CWE-388"],"ingestedAt":"2026-10-29T19:44:03.729Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2018/0xxx/CVE-2018-0155.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2018-0155","state":"PUBLISHED","datePublished":"2018-03-28T22:00:00.000Z","dateUpdated":"2026-01-12T21:52:53.398Z","assignerShortName":"cisco","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateReserved":"2017-11-27T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","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."}],"affected":[{"vendor":"n/a","product":"Cisco IOS and IOS XE","versions":[{"version":"Cisco IOS and IOS XE","status":"affected"}]}],"references":[{"url":"http://www.securitytracker.com/id/1040587","name":"1040587","tags":["vdb-entry","x_refsource_SECTRACK"]},{"url":"http://www.securityfocus.com/bid/103565","name":"103565","tags":["vdb-entry","x_refsource_BID"]},{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-bfd","tags":["x_refsource_CONFIRM"]},{"url":"https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05","tags":["x_refsource_MISC"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-388","description":"CWE-388","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"cisco","dateUpdated":"2018-04-19T13:57:01.000Z","orgId":"d1c1063e-7a18-46af-9102-31f8928bc633"},"datePublic":"2018-03-28T00:00:00.000Z","x_legacyV4Record":{"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"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.securitytracker.com/id/1040587","name":"1040587","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"http://www.securityfocus.com/bid/103565","name":"103565","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-bfd","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-05T03:14:16.886Z"}},{"title":"CISA ADP Vulnrichment","references":[{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0155","tags":["government-resource"]}],"metrics":[{"cvssV3_1":{"scope":"CHANGED","version":"3.1","baseScore":8.6,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2024-11-08T17:28:14.365306Z","id":"CVE-2018-0155","options":[{"Exploitation":"active"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}},{"other":{"type":"kev","content":{"dateAdded":"2022-03-03","reference":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0155"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-12T21:52:53.398Z"}}]}}}