Validating the order of the public keys in the Diffie-Hellman Key Agreement Protocol, when an approved safe prime is used, allows remote attackers (from the client side) to trigger unnecessarily expensive server-side DHE modular-exponentiation calculations. The client may cause asymmetric resource consumption. The basic attack scenario is that the client must claim that it can only communicate with DHE, and the server must be configured to allow DHE and validate the order of the public key.
Validar el orden de las claves públicas en el Protocolo de acuerdo de claves Diffie-Hellman, cuando se utiliza un valor primario seguro aprobado, permite a atacantes remotos (desde el lado del cliente) activar cálculos de exponenciación modular DHE del lado del servidor innecesariamente costosos. El cliente puede provocar un consumo asimétrico de recursos. El escenario de ataque básico es que el cliente debe afirmar que solo puede comunicarse con DHE y el servidor debe configurarse para permitir DHE y validar el orden de la clave pública.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
| Attack Vector | NETWORK |
|---|---|
| Attack Complexity | LOW |
| Privileges Required | NONE |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | NONE |
| Integrity Impact | NONE |
| Availability Impact | HIGH |
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Type: Secondary
Exploitability Score: 3.9
Impact Score: 3.6
| Source | Type | Description |
|---|---|---|
| 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary |
en
CWE-295
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