Use of a Broken or Risky Cryptographic Algorithm Affecting gnutls package, versions <0:3.6.8-10.el8_2


Severity

Recommended
medium

Based on CentOS security rating

    Threat Intelligence

    EPSS
    0.5% (77th percentile)

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  • Snyk ID SNYK-CENTOS8-GNUTLS-2040984
  • published 26 Jul 2021
  • disclosed 27 Mar 2020

How to fix?

Upgrade Centos:8 gnutls to version 0:3.6.8-10.el8_2 or higher.

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:8 relevant fixed versions and status.

GnuTLS 3.6.x before 3.6.13 uses incorrect cryptography for DTLS. The earliest affected version is 3.6.3 (2018-07-16) because of an error in a 2017-10-06 commit. The DTLS client always uses 32 '\0' bytes instead of a random value, and thus contributes no randomness to a DTLS negotiation. This breaks the security guarantees of the DTLS protocol.

CVSS Scores

version 3.1
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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
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Red Hat

7.4 high
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SUSE

7.4 high