---
id: CVE-2024-0567
title: >-
  A vulnerability was found in GnuTLS, where a cockpit (which uses gnuTLS)
  rejects a certificate chain with distributed trust
summary: >-
  A vulnerability was found in GnuTLS, where a cockpit (which uses gnuTLS)
  rejects a certificate chain with distributed trust. This issue occurs when
  validating a certificate chain with cockpit-certificate-ensure. This flaw
  allows an unaut…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-347
vendor: gnu
product: gnutls
affected:
  - 'gnutls >= 3.7.0, < 3.8.3'
  - fedora = 38
  - fedora = 39
  - active_iq_unified_manager
  - debian_linux = 11.0
patched:
  - gnutls 3.8.3
published: '2024-01-16'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T01:17:17.750'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-0567'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2024:0533'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2024:1082'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2024:1383'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2024:2094'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2024-0567'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2258544'
    label: secalert@redhat.com
  - url: 'https://gitlab.com/gnutls/gnutls/-/issues/1521'
    label: secalert@redhat.com
  - url: 'https://lists.gnupg.org/pipermail/gnutls-help/2024-January/004841.html'
    label: secalert@redhat.com
  - url: 'http://www.openwall.com/lists/oss-security/2024/01/19/3'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2024:0533'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2024:1082'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2024:1383'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2024:2094'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/security/cve/CVE-2024-0567'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2258544'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://gitlab.com/gnutls/gnutls/-/issues/1521'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7ZEIOLORQ7N6WRPFXZSYDL2MC4LP7VFV/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GNXKVR5YNUEBNHAHM5GSYKBZX4W2HMN2/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.gnupg.org/pipermail/gnutls-help/2024-January/004841.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20240202-0011/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-794697.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.0142
epssPercentile: 0.72295
ingestedAt: '2026-10-15T03:30:12.634Z'
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2025-05-08T18:37:07.175566Z'
---

## Overview

A vulnerability was found in GnuTLS, where a cockpit (which uses gnuTLS) rejects a certificate chain with distributed trust. This issue occurs when validating a certificate chain with cockpit-certificate-ensure. This flaw allows an unauthenticated, remote client or attacker to initiate a denial of service attack.

## Affected

- `gnutls >= 3.7.0, < 3.8.3`
- `fedora = 38`
- `fedora = 39`
- `active_iq_unified_manager`
- `debian_linux = 11.0`

## Remediation

Upgrade past the affected range:

- `gnutls 3.8.3`