CVE-2024-20494
Vulnerability from cvelistv5
Published
2024-10-23 17:53
Modified
2024-10-23 19:39
Severity ?
8.6 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Summary
A vulnerability in the TLS cryptography functionality of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to improper data validation during the TLS 1.3 handshake. An attacker could exploit this vulnerability by sending a crafted TLS 1.3 packet to an affected system through a TLS 1.3-enabled listening socket. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Note: This vulnerability can also impact the integrity of a device by causing VPN HostScan communication failures or file transfer failures when Cisco ASA Software is upgraded using Cisco Adaptive Security Device Manager (ASDM).
References
ykramarz@cisco.comhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-tls-CWY6zXB
Impacted products
Vendor Product Version
Cisco Cisco Firepower Threat Defense Software Version: 7.3.0
Version: 7.3.1
Version: 7.3.1.1
Version: 7.3.1.2
Version: 7.4.0
Version: 7.4.1
Version: 7.4.1.1
Version: 7.4.2
Show details on NVD website

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{
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        "metrics": [
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              "content": {
                "id": "CVE-2024-20494",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
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                "role": "CISA Coordinator",
                "timestamp": "2024-10-23T19:13:09.595545Z",
                "version": "2.0.3"
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    "cna": {
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            }
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      ],
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          "lang": "en",
          "value": "A vulnerability in the TLS cryptography functionality of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition.\r\n\r This vulnerability is due to improper data validation during the TLS 1.3 handshake. An attacker could exploit this vulnerability by sending a crafted TLS 1.3 packet to an affected system through a TLS 1.3-enabled listening socket. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.\r\n\r Note: This vulnerability can also impact the integrity of a device by causing VPN HostScan communication failures or file transfer failures when Cisco ASA Software is upgraded using Cisco Adaptive Security Device Manager (ASDM)."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
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          "format": "cvssV3_1"
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      "problemTypes": [
        {
          "descriptions": [
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              "description": "Improper Validation of Specified Type of Input",
              "lang": "en",
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      "providerMetadata": {
        "dateUpdated": "2024-10-23T17:53:00.574Z",
        "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "shortName": "cisco"
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      "references": [
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          "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-tls-CWY6zXB"
        }
      ],
      "source": {
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        "defects": [
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          "CSCwk74813"
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    "cveId": "CVE-2024-20494",
    "datePublished": "2024-10-23T17:53:00.574Z",
    "dateReserved": "2023-11-08T15:08:07.686Z",
    "dateUpdated": "2024-10-23T19:39:04.608Z",
    "state": "PUBLISHED"
  },
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  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-20494\",\"sourceIdentifier\":\"ykramarz@cisco.com\",\"published\":\"2024-10-23T18:15:12.783\",\"lastModified\":\"2024-10-25T12:56:07.750\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability in the TLS cryptography functionality of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition.\\r\\n\\r This vulnerability is due to improper data validation during the TLS 1.3 handshake. An attacker could exploit this vulnerability by sending a crafted TLS 1.3 packet to an affected system through a TLS 1.3-enabled listening socket. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.\\r\\n\\r Note: This vulnerability can also impact the integrity of a device by causing VPN HostScan communication failures or file transfer failures when Cisco ASA Software is upgraded using Cisco Adaptive Security Device Manager (ASDM).\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad en la funcionalidad de criptograf\u00eda TLS del software Cisco Adaptive Security Appliance (ASA) y del software Cisco Firepower Threat Defense (FTD) podr\u00eda permitir que un atacante remoto no autenticado haga que el dispositivo se recargue inesperadamente, lo que da como resultado una condici\u00f3n de denegaci\u00f3n de servicio (DoS). Esta vulnerabilidad se debe a una validaci\u00f3n de datos incorrecta durante el protocolo de enlace TLS 1.3. Un atacante podr\u00eda aprovechar esta vulnerabilidad enviando un paquete TLS 1.3 manipulado a un sistema afectado a trav\u00e9s de un socket de escucha habilitado para TLS 1.3. Una explotaci\u00f3n exitosa podr\u00eda permitir que el atacante haga que el dispositivo se recargue, lo que da como resultado una condici\u00f3n de denegaci\u00f3n de servicio. Nota: Esta vulnerabilidad tambi\u00e9n puede afectar la integridad de un dispositivo al provocar fallas de comunicaci\u00f3n de VPN HostScan o fallas de transferencia de archivos cuando se actualiza el software Cisco ASA mediante Cisco Adaptive Security Device Manager (ASDM).\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"ykramarz@cisco.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H\",\"baseScore\":8.6,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":4.0}]},\"weaknesses\":[{\"source\":\"ykramarz@cisco.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-1287\"}]}],\"references\":[{\"url\":\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-tls-CWY6zXB\",\"source\":\"ykramarz@cisco.com\"}]}}"
  }
}


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