FKIE_CVE-2025-20135

Vulnerability from fkie_nvd - Published: 2025-08-14 17:15 - Updated: 2025-08-15 13:12
Severity ?
4.3 (Medium) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Summary
A vulnerability in the DHCP client functionality of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, adjacent attacker to exhaust available memory. This vulnerability is due to improper validation of incoming DHCP packets. An attacker could exploit this vulnerability by repeatedly sending crafted DHCPv4 packets to an affected device. A successful exploit could allow the attacker to exhaust available memory, which would affect availability of services and prevent new processes from starting, resulting in a Denial of Service (DoS) condition that would require a manual reboot. Note: On Cisco Secure FTD Software, this vulnerability does not affect management interfaces.
References
psirt@cisco.comhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-dhcp-qj7nGs4N
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in the DHCP client functionality of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, adjacent attacker to exhaust available memory.\r\n\r\nThis vulnerability is due to improper validation of incoming DHCP packets. An attacker could exploit this vulnerability by repeatedly sending crafted DHCPv4 packets to an affected device. A successful exploit could allow the attacker to exhaust available memory, which would affect availability of services and prevent new processes from starting, resulting in a Denial of Service (DoS) condition that would require a manual reboot.\r\nNote: On Cisco Secure FTD Software, this vulnerability does not affect management interfaces."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en la funcionalidad del cliente DHCP del software Cisco Secure Firewall Adaptive Security Appliance (ASA) y del software Cisco Secure Firewall Threat Defense (FTD) podr\u00eda permitir que un atacante adyacente no autenticado agote la memoria disponible. Esta vulnerabilidad se debe a una validaci\u00f3n incorrecta de los paquetes DHCP entrantes. Un atacante podr\u00eda explotar esta vulnerabilidad enviando repetidamente paquetes DHCPv4 manipulados a un dispositivo afectado. Una explotaci\u00f3n exitosa podr\u00eda permitir que el atacante agote la memoria disponible, lo que afectar\u00eda la disponibilidad de los servicios e impedir\u00eda el inicio de nuevos procesos, lo que provocar\u00eda una denegaci\u00f3n de servicio (DoS) que requerir\u00eda un reinicio manual. Nota: En el software Cisco Secure FTD, esta vulnerabilidad no afecta a las interfaces de administraci\u00f3n."
    }
  ],
  "id": "CVE-2025-20135",
  "lastModified": "2025-08-15T13:12:51.217",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "psirt@cisco.com",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-08-14T17:15:34.827",
  "references": [
    {
      "source": "psirt@cisco.com",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-dhcp-qj7nGs4N"
    }
  ],
  "sourceIdentifier": "psirt@cisco.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "psirt@cisco.com",
      "type": "Primary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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