Описание
A timing side-channel in the handling of RSA ClientKeyExchange messages was discovered in GnuTLS. This side-channel can be sufficient to recover the key encrypted in the RSA ciphertext across a network in a Bleichenbacher style attack. To achieve a successful decryption the attacker would need to send a large amount of specially crafted messages to the vulnerable server. By recovering the secret from the ClientKeyExchange message, the attacker would be able to decrypt the application data exchanged over that connection.
A timing side-channel vulnerability was found in RSA ClientKeyExchange messages in GnuTLS. This side-channel may be sufficient to recover the key encrypted in the RSA ciphertext across a network in a Bleichenbacher style attack. To achieve a successful decryption, the attacker would need to send a large amount of specially crafted messages to the vulnerable server. By recovering the secret from the ClientKeyExchange message, the attacker would be able to decrypt the application data exchanged over that connection.
Отчет
The security flaw marked as medium as the Attack Complexity is high because a successful attack depends on conditions beyond the attacker's control and successful attack must required recovering the secret from the ClientKeyExchange message then only attacker can decrypt the application data.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 6 | gnutls | Out of support scope | ||
| Red Hat Enterprise Linux 7 | gnutls | Out of support scope | ||
| Red Hat Enterprise Linux 8 | gnutls | Fixed | RHSA-2023:1569 | 04.04.2023 |
| Red Hat Enterprise Linux 8 | gnutls | Fixed | RHSA-2023:1569 | 04.04.2023 |
| Red Hat Enterprise Linux 8.6 Extended Update Support | gnutls | Fixed | RHSA-2023:3361 | 31.05.2023 |
| Red Hat Enterprise Linux 9 | gnutls | Fixed | RHSA-2023:1141 | 07.03.2023 |
| Red Hat Enterprise Linux 9 | gnutls | Fixed | RHSA-2023:1141 | 07.03.2023 |
| Red Hat Enterprise Linux 9.0 Extended Update Support | gnutls | Fixed | RHSA-2023:1200 | 14.03.2023 |
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Дополнительная информация
Статус:
7.4 High
CVSS3
Связанные уязвимости
A timing side-channel in the handling of RSA ClientKeyExchange messages was discovered in GnuTLS. This side-channel can be sufficient to recover the key encrypted in the RSA ciphertext across a network in a Bleichenbacher style attack. To achieve a successful decryption the attacker would need to send a large amount of specially crafted messages to the vulnerable server. By recovering the secret from the ClientKeyExchange message, the attacker would be able to decrypt the application data exchanged over that connection.
A timing side-channel in the handling of RSA ClientKeyExchange messages was discovered in GnuTLS. This side-channel can be sufficient to recover the key encrypted in the RSA ciphertext across a network in a Bleichenbacher style attack. To achieve a successful decryption the attacker would need to send a large amount of specially crafted messages to the vulnerable server. By recovering the secret from the ClientKeyExchange message, the attacker would be able to decrypt the application data exchanged over that connection.
A timing side-channel in the handling of RSA ClientKeyExchange message ...
7.4 High
CVSS3