Information Exposure Affecting gnutls28 package, versions <3.6.7-4+deb10u10


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.19% (58th percentile)

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  • Snyk IDSNYK-DEBIAN10-GNUTLS28-3318300
  • published11 Feb 2023
  • disclosed15 Feb 2023

Introduced: 11 Feb 2023

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

How to fix?

Upgrade Debian:10 gnutls28 to version 3.6.7-4+deb10u10 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gnutls28 package and not the gnutls28 package as distributed by Debian. See How to fix? for Debian:10 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