{"schemaVersion":3,"id":"CVE-2018-15428","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"A vulnerability in the implementation of Border Gateway Protocol (BGP) functionality in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to incorrect processing of certain BGP update messages. An attacker could exploit this vulnerability by sending BGP update messages that include a specific, malformed attribute to be processed by an affected system. A successful exploit could allow the attacker to cause the BGP process to restart unexpectedly, resulting in a DoS condition. The Cisco implementation of BGP accepts incoming BGP traffic only from explicitly defined peers. To exploit this vulnerability, the malicious BGP update message would need to come from a configured, valid BGP peer, or would need to be injected by the attacker into the victim's BGP network on an existing, valid TCP connection to a BGP peer.","dates":{"published":"2018-10-05T14:00:00.000Z","modified":"2024-11-26T14:27:41.055Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.8,"severity":"medium","version":"3.0","versionLabel":"v3.0","source":"NVD","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.0","versionLabel":"v3.0","source":"NVD","score":6.8,"severity":"medium","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":4.3,"severity":"medium","vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.01954,"percentile":0.79961,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.01954},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01863,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01954,"percentile":0.79961}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01863,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01954,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01954,"percentile":0.79961}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-20","name":"Improper Input Validation","description":"The product receives input or data, but it does\n        not validate or incorrectly validates that the input has the\n        properties that are required to process the data safely and\n        correctly.","type":"weakness","status":"Stable","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/20.html"}],"affected":[{"vendor":"cisco","product":"cisco ios xr software","name":"Cisco IOS XR Software","label":"cisco ios xr software","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"n/a","noFixRecorded":false,"fixedIn":null}],"versionsText":"n/a","eol":null,"hubHref":"/vendor/cisco/cisco_ios_xr_software"},{"vendor":"cisco","product":"ios_xr","name":"ios xr","label":"ios_xr","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"6.0.1","noFixRecorded":false,"fixedIn":null},{"text":"6.0.2","noFixRecorded":false,"fixedIn":null},{"text":"6.1.1","noFixRecorded":false,"fixedIn":null},{"text":"6.1.2","noFixRecorded":false,"fixedIn":null},{"text":"6.1.3","noFixRecorded":false,"fixedIn":null},{"text":"6.1.4","noFixRecorded":false,"fixedIn":null},{"text":"6.2.1","noFixRecorded":false,"fixedIn":null},{"text":"6.2.2","noFixRecorded":false,"fixedIn":null},{"text":"6.2.3","noFixRecorded":false,"fixedIn":null},{"text":"6.4.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"6.0.1 | 6.0.2 | 6.1.1 | 6.1.2 | 6.1.3 | 6.1.4 | 6.2.1 | 6.2.2 | 6.2.3 | 6.4.1","eol":null,"hubHref":"/vendor/cisco/ios_xr"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181003-iosxr-dos","label":"tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181003-iosxr-dos","hostname":"tools.cisco.com","tags":["Vendor Advisory","X Refsource CISCO"]},{"url":"http://www.securitytracker.com/id/1041790","label":"www.securitytracker.com/id/1041790","hostname":"www.securitytracker.com","tags":["VDB Entry","X Refsource SECTRACK","Third Party Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2018-10-05T14:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-11-26T14:27:41.055Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":28,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T19:18:23.725Z","stale":false,"partial":false}}