Information Exposure Affecting libgnutls30-hmac package, versions <3.6.7-150200.14.25.2


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.24% (62nd percentile)

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  • Snyk IDSNYK-SLES153-LIBGNUTLS30HMAC-3339257
  • published4 Mar 2023
  • disclosed3 Mar 2023

Introduced: 3 Mar 2023

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

How to fix?

Upgrade SLES:15.3 libgnutls30-hmac to version 3.6.7-150200.14.25.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libgnutls30-hmac package and not the libgnutls30-hmac package as distributed by SLES. See How to fix? for SLES:15.3 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