ALT-PU-2023-1327-2

Package update gnutls30 in branch p10

Version3.6.16-alt3

Published2026-02-04

Max severityHIGH

Severity:

Closed issues (2)

HIGH7.4

Уязвимость криптографической библиотеки транспортного уровня GnuTLS, связанная с различием времени ответа при обработке шифротекста RSA в сообщении ClientKeyExchange с корректным и некорректным добавочным заполнением PKCS#1, позволяющая нарушителю восстановить ключ для расшифровки сообщений

Published: 2023-10-22Modified: 2024-09-24

CVSS 3.xHIGH 7.4

CVSS:3.x/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS 2.0HIGH 7.1

CVSS:2.0/AV:N/AC:H/Au:N/C:C/I:C/A:N

References

CVE-2023-0361

HIGH7.4

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.

Published: 2023-02-15Modified: 2025-03-19

CVSS 3.xHIGH 7.4

CVSS:3.x/CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References