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Fencer Vulns
medium 4.4

CVE-2024-12401 json

Cert-manager: potential dos when parsing specially crafted pem inputs

published 2024-11-20 23 mo ago modified 2026-09-10 1 mo ago also GHSA-ghw8-3xqw-hhcj , GHSA-r4pg-vg54-wxx4 , GO-2024-3282 , EUVD-2024-3471

cvss
4.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

A flaw was found in the cert-manager package. This flaw allows an attacker who can modify PEM data that the cert-manager reads, for example, in a Secret resource, to use large amounts of CPU in the cert-manager controller pod to effectively create a denial-of-service (DoS) vector for the cert-manager in the cluster.

Patch / fix

  • go github.com/cert-manager/cert-manager 1.12.14, 1.15.4, 1.16.2
  • govulncheck-vulndb openSUSE Tumbleweed 0.0.20241213T205935-1.1

opensuse advisories openSUSE-SU-2024:14599-1

  • cert-manager CBL-Mariner 2.0 1.11.2-18
  • cert-manager Azure Linux 3.0 1.12.15-1

azure linux advisories AZL-54313AZL-54324

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-12401 updated cvss 4.4

cert-manager: potential DoS when parsing specially crafted PEM inputs

  • Red Hat cert-manager Operator for Red Hat OpenShift cert-manager/cert-manager-operator-rhel9, cert-manager/jetstack-cert-manager-rhel9, cert-manager/cert-manager-operator-bundle, cert-manager/jetstack-cert-manager-acmesolver-rhel9 Red Hat Cryostat 3 cryostat-tech-preview/cryostat-rhel8-operator Red Hat Multicluster Engine for Kubernetes multicluster-engine/assisted-service-8-rhel8, multicluster-engine/assisted-service-9-rhel9 Red Hat OpenShift Serverless openshift-serverless-1/serving-queue-rhel8, openshift-serverless-1/serving-webhook-rhel8, openshift-serverless-1/serving-activator-rhel8, openshift-serverless-1/serving-autoscaler-rhel8, openshift-serverless-1/serving-controller-rhel8, openshift-serverless-1/serving-autoscaler-hpa-rhel8, +1 more Red Hat Connectivity Link 1 rhcl-1/rhcl-operator-container, rhcl-1/rhcl-operator-bundle-container Red Hat OpenShift Container Platform 4 openshift4/ose-contour-rhel8, openshift4/ose-agent-installer-api-server-rhel9
    +2 more products
    Red Hat Openshift Data Foundation 4 odf4/rook-ceph-rhel8-operator Red Hat OpenShift GitOps openshift-gitops-1/gitops-rhel8-operator
    affected: no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
22 mo ago

Exploit prediction

0.67% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.4 CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/cert-manager/cert-manager
<1.12.14
>=1.13.0-alpha.0, <1.15.4
>=1.16.0-alpha.0, <1.16.2
1.12.14
1.15.4
1.16.2

Affected products

  • Red Hat cert-manager Operator for Red Hat OpenShift
  • Red Hat Cryostat 3
  • Red Hat Multicluster Engine for Kubernetes
  • Red Hat OpenShift Serverless
  • Red Hat Red Hat Connectivity Link 1
  • Red Hat Red Hat OpenShift Container Platform 4
  • Red Hat Red Hat Openshift Data Foundation 4
  • Red Hat Red Hat OpenShift GitOps

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.