Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2021-4235

Published: Dec 27, 2022 | Modified: Apr 11, 2025
CVSS 3.x
5.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
5.5 MODERATE
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Ubuntu
MEDIUM
Vulnerability-free packages from our partners
root.io logo minimus.io logo echo.ai logo
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2021-4235
CWEhttps://cwe.mitre.org/data/definitions/.html

Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system resources. If parsing user input, this may be used as a denial of service vector.

Affected Software

NameVendorStart VersionEnd Version
YamlYaml_project*2.2.3 (excluding)
Red Hat OpenShift Container Platform 4.12RedHatopenshift-clients-0:4.12.0-202301042257.p0.g854f807.assembly.stream.el9*
Red Hat OpenShift Container Platform 4.12RedHatopenshift4/ose-installer:v4.12.0-202301271115.p0.g7fea1c4.assembly.stream*
Red Hat OpenShift Container Platform 4.12RedHatopenshift4/metallb-rhel8-operator:v4.12.0-202301301729.p0.g917cd33.assembly.stream*
Red Hat OpenShift Container Platform 4.12RedHatopenshift4/ose-openshift-controller-manager-rhel8:v4.12.0-202306090942.p0.gb6528f9.assembly.stream*
Red Hat OpenShift Container Platform 4.13RedHatopenshift4/ose-installer:v4.13.0-202305091542.p0.g44db7b2.assembly.stream*
Red Hat OpenShift Container Platform 4.13RedHatopenshift4/ose-machine-api-operator:v4.13.0-202304190216.p0.ga23baf7.assembly.stream*
RHODF-4.13-RHEL-9RedHatodf4/mcg-rhel9-operator:v4.13.0-41*
RHODF-4.13-RHEL-9RedHatodf4/odf-rhel9-operator:v4.13.0-24*
Golang-github-coreos-discovery-etcd-ioUbuntudevel*
Golang-github-coreos-discovery-etcd-ioUbuntuesm-apps/focal*
Golang-github-coreos-discovery-etcd-ioUbuntuesm-apps/jammy*
Golang-github-coreos-discovery-etcd-ioUbuntuesm-apps/noble*
Golang-github-coreos-discovery-etcd-ioUbuntufocal*
Golang-github-coreos-discovery-etcd-ioUbuntujammy*
Golang-github-coreos-discovery-etcd-ioUbuntukinetic*
Golang-github-coreos-discovery-etcd-ioUbuntulunar*
Golang-github-coreos-discovery-etcd-ioUbuntumantic*
Golang-github-coreos-discovery-etcd-ioUbuntunoble*
Golang-github-coreos-discovery-etcd-ioUbuntuoracular*
Golang-github-coreos-discovery-etcd-ioUbuntuplucky*
Golang-github-coreos-discovery-etcd-ioUbuntuquesting*
Golang-github-coreos-discovery-etcd-ioUbuntutrusty*
Golang-github-coreos-discovery-etcd-ioUbuntuxenial*
Golang-gopkg-yaml.v3Ubuntukinetic*
Golang-gopkg-yaml.v3Ubuntutrusty*
Golang-gopkg-yaml.v3Ubuntuxenial*
Golang-yaml.v2Ubuntubionic*
Golang-yaml.v2Ubuntuesm-apps/bionic*
Golang-yaml.v2Ubuntuesm-apps/focal*
Golang-yaml.v2Ubuntuesm-infra/xenial*
Golang-yaml.v2Ubuntufocal*
Golang-yaml.v2Ubuntukinetic*
Golang-yaml.v2Ubuntutrusty*
Golang-yaml.v2Ubuntuupstream*
Golang-yaml.v2Ubuntuxenial*
KubernetesUbuntufocal*
KubernetesUbuntukinetic*
KubernetesUbuntulunar*
KubernetesUbuntumantic*
KubernetesUbuntuoracular*
KubernetesUbuntutrusty*
KubernetesUbuntuxenial*
Singularity-containerUbuntubionic*
Singularity-containerUbuntuoracular*
Singularity-containerUbuntuplucky*
Singularity-containerUbuntutrusty*
Singularity-containerUbuntuxenial*
WebhookUbuntubionic*
WebhookUbuntufocal*
WebhookUbuntukinetic*
WebhookUbuntulunar*
WebhookUbuntumantic*
WebhookUbuntuoracular*
WebhookUbuntuplucky*
WebhookUbuntutrusty*
WebhookUbuntuxenial*

References

Aqua Security is the largest pure-play cloud native security company, providing customers the freedom to innovate and run their businesses with minimal friction. The Aqua Cloud Native Security Platform provides prevention, detection, and response automation across the entire application lifecycle to secure the build, secure cloud infrastructure and secure running workloads wherever they are deployed.
Copyright © 2026 Aqua Security Software Ltd.   Privacy Policy | Terms of Use