{"id":"CVE-2018-15372","state":"PUBLISHED","title":"Cisco IOS XE Software MACsec MKA Using EAP-TLS Authentication Bypass Vulnerability","description":"A vulnerability in the MACsec Key Agreement (MKA) using Extensible Authentication Protocol-Transport Layer Security (EAP-TLS) functionality of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to bypass authentication and pass traffic through a Layer 3 interface of an affected device. The vulnerability is due to a logic error in the affected software. An attacker could exploit this vulnerability by connecting to and passing traffic through a Layer 3 interface of an affected device, if the interface is configured for MACsec MKA using EAP-TLS and is running in access-session closed mode. A successful exploit could allow the attacker to bypass 802.1x network access controls and gain access to the network.","publishedAt":"2018-10-05T14:00:00.000Z","updatedAt":"2024-11-26T14:35:55.702Z","severity":null,"assigner":"cisco","products":["Cisco Cisco IOS XE Software"],"affected":[{"vendor":"Cisco","product":"Cisco IOS XE Software","versions":[{"version":"n/a","status":"affected"}]}],"references":["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180926-macsec","http://www.securityfocus.com/bid/105416"],"weaknesses":["CWE-284"],"ingestedAt":"2026-10-29T19:44:22.805Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2018/15xxx/CVE-2018-15372.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2018-15372","state":"PUBLISHED","datePublished":"2018-10-05T14:00:00.000Z","dateUpdated":"2024-11-26T14:35:55.702Z","assignerShortName":"cisco","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateReserved":"2018-08-17T00:00:00.000Z"},"containers":{"cna":{"title":"Cisco IOS XE Software MACsec MKA Using EAP-TLS Authentication Bypass Vulnerability","descriptions":[{"lang":"en","value":"A vulnerability in the MACsec Key Agreement (MKA) using Extensible Authentication Protocol-Transport Layer Security (EAP-TLS) functionality of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to bypass authentication and pass traffic through a Layer 3 interface of an affected device. The vulnerability is due to a logic error in the affected software. An attacker could exploit this vulnerability by connecting to and passing traffic through a Layer 3 interface of an affected device, if the interface is configured for MACsec MKA using EAP-TLS and is running in access-session closed mode. 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The vulnerability is due to a logic error in the affected software. An attacker could exploit this vulnerability by connecting to and passing traffic through a Layer 3 interface of an affected device, if the interface is configured for MACsec MKA using EAP-TLS and is running in access-session closed mode. 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