NULL Pointer Dereference Affecting gnutls package, versions *


Severity

Recommended
low

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
1.38% (69th percentile)

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  • Snyk IDSNYK-RHEL8-GNUTLS-2404206
  • published17 Feb 2022
  • disclosed22 Dec 2021

Introduced: 22 Dec 2021

CVE-2021-4209  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:8 gnutls.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gnutls package and not the gnutls package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

A NULL pointer dereference flaw was found in GnuTLS. As Nettle's hash update functions internally call memcpy, providing zero-length input may cause undefined behavior. This flaw leads to a denial of service after authentication in rare circumstances.

CVSS Base Scores

version 3.1