During key agreement in a TLS handshake using a DH(E) based ciphersuite a malicious server can send a very large prime value to the client. This will cause the client to spend an unreasonably long period of time generating a key for this prime resulting in a hang until the client has finished. This could be exploited in a Denial Of Service attack. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o).
Durante los acuerdos de clave en un handshake TLS mediante un conjunto de cifrado basado en DH(E), un servidor malicioso puede enviar un valor primo muy grande al cliente. Esto provocará que el cliente gaste una cantidad de tiempo demasiado grande generando una clave para este primo, lo que resulta en un bloqueo hasta que termine el cliente. Esto podría explotarse en un ataque de Denegación de servicio (DoS). Se ha solucionado en OpenSSL 1.1.0i-dev (afecta a 1.1.0-1.1.0h). Se ha solucionado en OpenSSL 1.0.2p-dev (afecta a 1.0.2-1.0.2o).
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 |
AV:N/AC:L/Au:N/C:N/I:N/A:P
| Access Vector | NETWORK |
|---|---|
| Access Complexity | LOW |
| Authentication | NONE |
| Confidentiality Impact | NONE |
| Integrity Impact | NONE |
| Availability Impact | PARTIAL |
| Source | Type | Description |
|---|---|---|
| [email protected] | Primary |
en
CWE-320
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| openssl | openssl | * | <built-in method update of dict object at 0x72a9ccd2bf80> | Application |
| openssl | openssl | * | <built-in method update of dict object at 0x72a9ccd28c00> | Application |
| canonical | ubuntu_linux | 12.04 | <built-in method update of dict object at 0x72a9b0b39fc0> | Operating System |
| canonical | ubuntu_linux | 14.04 | <built-in method update of dict object at 0x72a9cc523640> | Operating System |
| canonical | ubuntu_linux | 16.04 | <built-in method update of dict object at 0x72a9ccd2af40> | Operating System |
| canonical | ubuntu_linux | 17.10 | <built-in method update of dict object at 0x72a9ccd28800> | Operating System |
| canonical | ubuntu_linux | 18.04 | <built-in method update of dict object at 0x72a9b0905900> | Operating System |
| debian | debian_linux | 8.0 | <built-in method update of dict object at 0x72a9ccd2a940> | Operating System |
| nodejs | node.js | * | <built-in method update of dict object at 0x72a9b0b39700> | Application |
| nodejs | node.js | * | <built-in method update of dict object at 0x72a9ccd288c0> | Application |
| nodejs | node.js | * | <built-in method update of dict object at 0x72a9b0b3bd40> | Application |
| nodejs | node.js | * | <built-in method update of dict object at 0x72a9ccd2b640> | Application |
| nodejs | node.js | * | <built-in method update of dict object at 0x72a9b0b3ab40> | Application |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* |
| Yes | cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* |
| Yes | cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* |
| Yes | cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* |
| Yes | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* |
| Yes | cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:* |
| Yes | cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* |
| Yes | cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:* |
| Yes | cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* |