cve-2024-20407
Vulnerability from cvelistv5
Published
2024-10-23 17:36
Modified
2024-10-24 16:09
Severity ?
5.8 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Summary
A vulnerability in the interaction between the TCP Intercept feature and the Snort 3 detection engine on Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured policies on an affected system. Devices that are configured with Snort 2 are not affected by this vulnerability. This vulnerability is due to a logic error when handling embryonic (half-open) TCP connections. An attacker could exploit this vulnerability by sending a crafted traffic pattern through an affected device. A successful exploit could allow unintended traffic to enter the network protected by the affected device.
References
ykramarz@cisco.comhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-bypass-PTry37fX
Impacted products
Vendor Product Version
Show details on NVD website

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{
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                "options": [
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                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
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                "role": "CISA Coordinator",
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                "version": "2.0.3"
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      "exploits": [
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          "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."
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      "metrics": [
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            "attackVector": "NETWORK",
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            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
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    "assignerShortName": "cisco",
    "cveId": "CVE-2024-20407",
    "datePublished": "2024-10-23T17:36:40.728Z",
    "dateReserved": "2023-11-08T15:08:07.661Z",
    "dateUpdated": "2024-10-24T16:09:41.083Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-20407\",\"sourceIdentifier\":\"ykramarz@cisco.com\",\"published\":\"2024-10-23T18:15:08.413\",\"lastModified\":\"2024-10-25T12:56:36.827\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability in the interaction between the TCP Intercept feature and the Snort 3 detection engine on Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured policies on an affected system. Devices that are configured with Snort 2 are not affected by this vulnerability. \\r\\n\\r This vulnerability is due to a logic error when handling embryonic (half-open) TCP connections. An attacker could exploit this vulnerability by sending a crafted traffic pattern through an affected device. A successful exploit could allow unintended traffic to enter the network protected by the affected device.\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad en la interacci\u00f3n entre la funci\u00f3n TCP Intercept y el motor de detecci\u00f3n Snort 3 en el software Cisco Firepower Threat Defense (FTD) podr\u00eda permitir que un atacante remoto no autenticado eluda las pol\u00edticas configuradas en un sistema afectado. Los dispositivos que est\u00e1n configurados con Snort 2 no se ven afectados por esta vulnerabilidad. Esta vulnerabilidad se debe a un error l\u00f3gico al manejar conexiones TCP embrionarias (semiabiertas). Un atacante podr\u00eda explotar esta vulnerabilidad enviando un patr\u00f3n de tr\u00e1fico manipulado a trav\u00e9s de un dispositivo afectado. Una explotaci\u00f3n exitosa podr\u00eda permitir que el tr\u00e1fico no deseado ingrese a la red protegida por el dispositivo afectado.\"}],\"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:L/A:N\",\"baseScore\":5.8,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4}]},\"weaknesses\":[{\"source\":\"ykramarz@cisco.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-399\"}]}],\"references\":[{\"url\":\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-bypass-PTry37fX\",\"source\":\"ykramarz@cisco.com\"}]}}"
  }
}


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