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Information Exposure Affecting gnutls28 package, versions <3.7.1-5+deb11u3

Severity

 Recommended
0.0
high
0
10

Snyk's Security Team recommends NVD's CVSS assessment

    Threat Intelligence

    EPSS
    0.17% (54th percentile)

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  • Snyk ID SNYK-DEBIAN11-GNUTLS28-3318299
  • published 11 Feb 2023
  • disclosed 15 Feb 2023
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Introduced: 11 Feb 2023

CVE-2023-0361 Open this link in a new tab
CWE-203 Open this link in a new tab

How to fix?

Upgrade Debian:11 gnutls28 to version 3.7.1-5+deb11u3 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:11 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.

References

CVSS Scores

version 3.1
Expand this section

NVD

7.4 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    None
Expand this section

SUSE

5.9 medium
Expand this section

Red Hat

7.4 high