Improper Protection Against Physical Side Channels Affecting gnutls package, versions *


Severity

Recommended
medium

Based on CentOS security rating.

Threat Intelligence

EPSS
0.19% (58th percentile)

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  • Snyk IDSNYK-CENTOS7-GNUTLS-3321988
  • published15 Feb 2023
  • disclosed14 Feb 2023

Introduced: 14 Feb 2023

CVE-2023-0361  (opens in a new tab)
CWE-1300  (opens in a new tab)
CWE-203  (opens in a new tab)

How to fix?

There is no fixed version for Centos:7 gnutls.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gnutls package and not the gnutls package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

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.

CVSS Scores

version 3.1