fkie_cve-2025-20137
Vulnerability from fkie_nvd
Published
2025-05-07 18:15
Modified
2025-08-05 14:08
Severity ?
Summary
A vulnerability in the access control list (ACL) programming of Cisco IOS Software that is running on Cisco Catalyst 1000 Switches and Cisco Catalyst 2960L Switches could allow an unauthenticated, remote attacker to bypass a configured ACL.
This vulnerability is due to the use of both an IPv4 ACL and a dynamic ACL of IP Source Guard on the same interface, which is an unsupported configuration. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device.
Note: Cisco documentation has been updated to reflect that this is an unsupported configuration. However, Cisco is publishing this advisory because the device will not prevent an administrator from configuring both features on the same interface. There are no plans to implement the ability to configure both features on the same interface on Cisco Catalyst 1000 or Catalyst 2960L Switches.
References
Impacted products
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the access control list (ACL) programming of Cisco IOS Software that is running on Cisco Catalyst 1000 Switches and Cisco Catalyst 2960L Switches could allow an unauthenticated, remote attacker to bypass a configured ACL.\r\n\r This vulnerability is due to the use of both an IPv4 ACL and a dynamic ACL of IP Source Guard on the same interface, which is an unsupported configuration. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device.\r\n\r Note: Cisco documentation has been updated to reflect that this is an unsupported configuration. However, Cisco is publishing this advisory because the device will not prevent an administrator from configuring both features on the same interface. There are no plans to implement the ability to configure both features on the same interface on Cisco Catalyst 1000 or Catalyst 2960L Switches."
},
{
"lang": "es",
"value": "Una vulnerabilidad en la programaci\u00f3n de la lista de control de acceso (ACL) del software Cisco IOS, que se ejecuta en los switches Cisco Catalyst 1000 y Cisco Catalyst 2960L, podr\u00eda permitir que un atacante remoto no autenticado omita una ACL configurada. Esta vulnerabilidad se debe al uso de una ACL IPv4 y una ACL din\u00e1mica de IP Source Guard en la misma interfaz, una configuraci\u00f3n no compatible. Un atacante podr\u00eda explotar esta vulnerabilidad intentando enviar tr\u00e1fico a trav\u00e9s de un dispositivo afectado. Una explotaci\u00f3n exitosa podr\u00eda permitirle omitir una ACL en el dispositivo afectado. Nota: La documentaci\u00f3n de Cisco se ha actualizado para reflejar que esta es una configuraci\u00f3n no compatible. Sin embargo, Cisco publica este aviso porque el dispositivo no impedir\u00e1 que un administrador configure ambas funciones en la misma interfaz. No hay planes para implementar la capacidad de configurar ambas funciones en la misma interfaz en los switches Cisco Catalyst 1000 o Catalyst 2960L."
}
],
"id": "CVE-2025-20137",
"lastModified": "2025-08-05T14:08:32.490",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.7,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 1.4,
"source": "psirt@cisco.com",
"type": "Primary"
}
]
},
"published": "2025-05-07T18:15:36.473",
"references": [
{
"source": "psirt@cisco.com",
"tags": [
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],
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipsgacl-pg6qfZk"
}
],
"sourceIdentifier": "psirt@cisco.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-284"
}
],
"source": "psirt@cisco.com",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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