{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-20337",
        "ASSIGNER": "psirt@cisco.com",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "A vulnerability in the SAML authentication process of Cisco Secure Client could allow an unauthenticated, remote attacker to conduct a carriage return line feed (CRLF) injection attack against a user. \r\n\r This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by persuading a user to click a crafted link while establishing a VPN session. A successful exploit could allow the attacker to execute arbitrary script code in the browser or access sensitive, browser-based information, including a valid SAML token. The attacker could then use the token to establish a remote access VPN session with the privileges of the affected user. Individual hosts and services behind the VPN headend would still need additional credentials for successful access."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "Improper Neutralization of CRLF Sequences ('CRLF Injection')",
                        "cweId": "CWE-93"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Cisco",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Cisco Secure Client",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.9.00086"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.9.01095"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.9.02028"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.9.03047"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.9.03049"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.9.04043"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.9.04053"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.9.05042"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.9.06037"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.10.00093"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.10.01075"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.10.02086"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.10.03104"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.10.04065"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.10.04071"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.10.05085"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.10.05095"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.10.05111"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.10.06079"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.10.06090"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.10.07061"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.10.07062"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "4.10.07073"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "5.0.00238"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "5.0.00529"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "5.0.00556"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "5.0.01242"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "5.0.02075"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "5.0.03072"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "5.0.03076"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "5.0.04032"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "5.0.05040"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "5.1.0.136"
                                        },
                                        {
                                            "version_affected": "=",
                                            "version_value": "5.1.1.42"
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-secure-client-crlf-W43V4G7",
                "refsource": "MISC",
                "name": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-secure-client-crlf-W43V4G7"
            }
        ]
    },
    "source": {
        "advisory": "cisco-sa-secure-client-crlf-W43V4G7",
        "discovery": "EXTERNAL",
        "defects": [
            "CSCwi37512"
        ]
    },
    "exploit": [
        {
            "lang": "en",
            "value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
        }
    ],
    "impact": {
        "cvss": [
            {
                "version": "3.1",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
                "baseScore": 8.2,
                "baseSeverity": "HIGH",
                "attackVector": "NETWORK",
                "attackComplexity": "LOW",
                "privilegesRequired": "NONE",
                "userInteraction": "REQUIRED",
                "scope": "CHANGED",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "LOW",
                "availabilityImpact": "NONE"
            }
        ]
    }
}