{
  "GSD": {
    "alias": "CVE-2018-15372",
    "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.",
    "id": "GSD-2018-15372"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2018-15372"
      ],
      "details": "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.",
      "id": "GSD-2018-15372",
      "modified": "2023-12-13T01:22:24.171891Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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      "CVE_data_meta": {
        "ASSIGNER": "psirt@cisco.com",
        "DATE_PUBLIC": "2018-09-26T16:00:00-0500",
        "ID": "CVE-2018-15372",
        "STATE": "PUBLIC",
        "TITLE": "Cisco IOS XE Software MACsec MKA Using EAP-TLS Authentication Bypass Vulnerability"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Cisco IOS XE Software",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "n/a"
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            }
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      "description": {
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          {
            "lang": "eng",
            "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. A successful exploit could allow the attacker to bypass 802.1x network access controls and gain access to the network."
          }
        ]
      },
      "impact": {
        "cvss": {
          "baseScore": "6.5",
          "version": "3.0"
        }
      },
      "problemtype": {
        "problemtype_data": [
          {
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                "value": "CWE-284"
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        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "20180926 Cisco IOS XE Software MACsec MKA Using EAP-TLS Authentication Bypass Vulnerability",
            "refsource": "CISCO",
            "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180926-macsec"
          },
          {
            "name": "105416",
            "refsource": "BID",
            "url": "http://www.securityfocus.com/bid/105416"
          }
        ]
      },
      "source": {
        "advisory": "cisco-sa-20180926-macsec",
        "defect": [
          [
            "CSCvh09411"
          ]
        ],
        "discovery": "UNKNOWN"
      }
    },
    "nvd.nist.gov": {
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        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:cisco:ios_xe:16.8.1:*:*:*:*:*:*:*",
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                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:cisco:ios_xe:16.9.1:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
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      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "psirt@cisco.com",
          "ID": "CVE-2018-15372"
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        "data_version": "4.0",
        "description": {
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              "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. A successful exploit could allow the attacker to bypass 802.1x network access controls and gain access to the network."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "NVD-CWE-noinfo"
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          "reference_data": [
            {
              "name": "20180926 Cisco IOS XE Software MACsec MKA Using EAP-TLS Authentication Bypass Vulnerability",
              "refsource": "CISCO",
              "tags": [
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              ],
              "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180926-macsec"
            },
            {
              "name": "105416",
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              "tags": [
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                "VDB Entry"
              ],
              "url": "http://www.securityfocus.com/bid/105416"
            }
          ]
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "ADJACENT_NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 4.8,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:A/AC:L/Au:N/C:P/I:P/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 6.5,
          "impactScore": 4.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.0"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 5.2
        }
      },
      "lastModifiedDate": "2019-10-09T23:35Z",
      "publishedDate": "2018-10-05T14:29Z"
    }
  }
}