CVE-2025-5089

In a CVX cluster, an EOS switch connected to a CVX server is not resilient to certain malformed messages received from the connected CVX server. Similarly, the CVX server is not resilient to certain malformed messages received from the connected EOS switch. This leads to either a Sysdb agent crash on the EOS device causing a soft reset of the switch or agent crashes on the CVX server causing instability of the CVX cluster. An attacker could use this behavior to create a denial of service (DoS) scenario. Note that this would require the attacker to already have a high privilege access to the connected device to be able to send custom TCP packets. EOS switches that are not connected to a CVX server are not impacted.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.arista.com/en/support/advisories-notices/security-advisory/22868-security-advisory-0126

Configurations

No configuration.

History

30 Sep 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) En un clúster CVX, un switch EOS conectado a un servidor CVX no es resistente a ciertos mensajes malformados recibidos del servidor CVX conectado. De manera similar, el servidor CVX no es resistente a ciertos mensajes malformados recibidos del switch EOS conectado. Esto conduce a un fallo del agente Sysdb en el dispositivo EOS que causa un reinicio suave del switch o a fallos de agentes en el servidor CVX que causan inestabilidad del clúster CVX. Un atacante podría usar este comportamiento para crear un escenario de denegación de servicio (DoS). Tenga en cuenta que esto requeriría que el atacante ya tenga acceso de alto privilegio al dispositivo conectado para poder enviar paquetes TCP personalizados. Los switches EOS que no están conectados a un servidor CVX no se ven afectados.

Information

Published : 2026-06-05 17:16

Updated : 2026-10-07 08:10

NVD link : CVE-2025-5089

Mitre link : CVE-2025-5089

CVE.ORG link : CVE-2025-5089

JSON object : View

Products Affected

No product.

CWE

CWE-20

Improper Input Validation

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Similarly, the CVX server is not resilient to certain malformed messages received from the connected EOS switch. This leads to either a Sysdb agent crash on the EOS device causing a soft reset of the switch or agent crashes on the CVX server causing instability of the CVX cluster. An attacker could use this behavior to create a denial of service (DoS) scenario. Note that this would require the attacker to already have a high privilege access to the connected device to be able to send custom TCP packets. EOS switches that are not connected to a CVX server are not impacted."}, {"lang": "es", "value": "En un cl\u00faster CVX, un switch EOS conectado a un servidor CVX no es resistente a ciertos mensajes malformados recibidos del servidor CVX conectado. De manera similar, el servidor CVX no es resistente a ciertos mensajes malformados recibidos del switch EOS conectado. Esto conduce a un fallo del agente Sysdb en el dispositivo EOS que causa un reinicio suave del switch o a fallos de agentes en el servidor CVX que causan inestabilidad del cl\u00faster CVX. Un atacante podr\u00eda usar este comportamiento para crear un escenario de denegaci\u00f3n de servicio (DoS). Tenga en cuenta que esto requerir\u00eda que el atacante ya tenga acceso de alto privilegio al dispositivo conectado para poder enviar paquetes TCP personalizados. Los switches EOS que no est\u00e1n conectados a un servidor CVX no se ven afectados."}], "lastModified": "2026-10-07T08:10:00.200", "sourceIdentifier": "psirt@arista.com"}