Improper Input Validation Affecting gnutls package, versions <0:3.6.14-7.el8_3


Severity

Recommended
medium

Based on CentOS security rating

    Threat Intelligence

    EPSS
    0.37% (73rd percentile)

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  • Snyk ID SNYK-CENTOS8-GNUTLS-2087574
  • published 26 Jul 2021
  • disclosed 4 Sep 2020

How to fix?

Upgrade Centos:8 gnutls to version 0:3.6.14-7.el8_3 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.

An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing, and then an invalid second handshake occurs. The crash happens in the application's error handling path, where the gnutls_deinit function is called after detecting a handshake failure.

CVSS Scores

version 3.1
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NVD

7.5 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High
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Red Hat

7.5 high
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SUSE

5.9 medium