fkie_cve-2025-20219
Vulnerability from fkie_nvd
Published
2025-08-14 17:15
Modified
2025-08-15 13:12
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Summary
A vulnerability in the implementation of access control rules for loopback interfaces in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to send traffic that should have been blocked to a loopback interface. This vulnerability is due to improper enforcement of access control rules for loopback interfaces. An attacker could exploit this vulnerability by sending traffic to a loopback interface on an affected device. A successful exploit could allow the attacker to bypass configured access control rules and send traffic that should have been blocked to a loopback interface on the device.
References
psirt@cisco.comhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-acl-bypass-mtPze9Yh
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in the implementation of access control rules for loopback interfaces in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to send traffic that should have been blocked to a loopback interface.\r\n\r\nThis vulnerability is due to improper enforcement of access control rules for loopback interfaces. An attacker could exploit this vulnerability by sending traffic to a loopback interface on an affected device. A successful exploit could allow the attacker to bypass configured access control rules and send traffic\u0026nbsp;that should have been blocked to a loopback interface on the device."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en la implementaci\u00f3n de las reglas de control de acceso para interfaces de bucle invertido en el software Cisco Secure Firewall Adaptive Security Appliance (ASA) y el software Cisco Secure Firewall Threat Defense (FTD) podr\u00eda permitir que un atacante remoto no autenticado env\u00ede tr\u00e1fico que deber\u00eda estar bloqueado a una interfaz de bucle invertido. Esta vulnerabilidad se debe a la aplicaci\u00f3n incorrecta de las reglas de control de acceso para las interfaces de bucle invertido. Un atacante podr\u00eda explotar esta vulnerabilidad enviando tr\u00e1fico a una interfaz de bucle invertido en un dispositivo afectado. Una explotaci\u00f3n exitosa podr\u00eda permitir al atacante eludir las reglas de control de acceso configuradas y enviar tr\u00e1fico que deber\u00eda estar bloqueado a una interfaz de bucle invertido en el dispositivo."
    }
  ],
  "id": "CVE-2025-20219",
  "lastModified": "2025-08-15T13:12:51.217",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "psirt@cisco.com",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-08-14T17:15:35.920",
  "references": [
    {
      "source": "psirt@cisco.com",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-acl-bypass-mtPze9Yh"
    }
  ],
  "sourceIdentifier": "psirt@cisco.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ],
      "source": "psirt@cisco.com",
      "type": "Primary"
    }
  ]
}


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