cvelist/2021/1xxx/CVE-2021-1620.json

{
    "CVE_data_meta": {
        "ASSIGNER": "psirt@cisco.com",
        "DATE_PUBLIC": "2021-09-22T16:00:00",
        "ID": "CVE-2021-1620",
        "STATE": "PUBLIC",
        "TITLE": "Cisco IOS and IOS XE Software IKEv2 AutoReconnect Feature Denial of Service Vulnerability"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Cisco IOS ",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "n/a"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "Cisco"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "A vulnerability in the Internet Key Exchange Version 2 (IKEv2) support for the AutoReconnect feature of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to exhaust the free IP addresses from the assigned local pool. This vulnerability occurs because the code does not release the allocated IP address under certain failure conditions. An attacker could exploit this vulnerability by trying to connect to the device with a non-AnyConnect client. A successful exploit could allow the attacker to exhaust the IP addresses from the assigned local pool, which prevents users from logging in and leads to a denial of service (DoS) condition."
            }
        ]
    },
    "exploit": [
        {
            "lang": "eng",
            "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. "
        }
    ],
    "impact": {
        "cvss": {
            "baseScore": "7.7",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H ",
            "version": "3.0"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-563"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "20210922 Cisco IOS and IOS XE Software IKEv2 AutoReconnect Feature Denial of Service Vulnerability",
                "refsource": "CISCO",
                "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ikev2-ebFrwMPr"
            }
        ]
    },
    "source": {
        "advisory": "cisco-sa-ikev2-ebFrwMPr",
        "defect": [
            [
                "CSCvw25564"
            ]
        ],
        "discovery": "INTERNAL"
    }
}