Resource exhaustion in yaml - CVE-2021-4235

Vulnerability identifier: #VU71361

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-4235

CWE-ID: CWE-400

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources when parsing YAML files. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

yaml
Migration Toolkit for Containers
Red Hat OpenShift Container Platform
Ansible Automation Platform
Red Hat Migration Toolkit for Applications
IBM Fusion HCI
Ubuntu
golang-yaml.v2-dev (Ubuntu package)
golang-gopkg-yaml.v2-dev (Ubuntu package)
Planning Analytics Connector for SAP
IBM Cloud Pak for Watson AIOps
OpenShift Service Mesh
OpenShift Data Foundation (formerly OpenShift Container Storage)

Install updates from vendor's website.

yaml - update to 2.2.3
Migration Toolkit for Containers - addressed in versions 1.7.7, 1.7.8
Red Hat OpenShift Container Platform - addressed in versions 4.12.0, 4.12.2, 4.12.22, 4.13.0
Red Hat Migration Toolkit for Applications - update to 6.1.0
golang-yaml.v2-dev (Ubuntu package) - addressed in versions Ubuntu Pro, 2.2.2-1ubuntu0.1
golang-gopkg-yaml.v2-dev (Ubuntu package) - addressed in versions Ubuntu Pro, 2.2.2-1ubuntu0.1
Planning Analytics Connector for SAP - update to 1.0 IF1
OpenShift Service Mesh - update to 2.4.0
IBM Fusion HCI - update to 2.6.1
IBM Cloud Pak for Watson AIOps - update to 4.1
OpenShift Data Foundation (formerly OpenShift Container Storage) - update to 4.13.0

• https://github.com/go-yaml/yaml/commit/bb4e33bf68bf89cad44d386192cbed201f35b241
• https://pkg.go.dev/vuln/GO-2021-0061
• https://github.com/go-yaml/yaml/pull/375

• Denial of service in YAML
• Multiple vulnerabilities in OpenShift Container Platform 4.12
• Multiple vulnerabilities in OpenShift Container Platform 4.12
• Multiple vulnerabilities in Migration Toolkit for Containers (MTC)
• Multiple vulnerabilities in Migration Toolkit for Containers (MTC)
• Multiple vulnerabilities in Red Hat Migration Toolkit for Applications
• Multiple vulnerabilities in OpenShift Container Platform 4.12
• Multiple vulnerabilities in OpenShift Container Platform 4.13
• Multiple vulnerabiltiies in Red Hat OpenShift Service Mesh Containers 2.4
• Multiple vulnerabilities in Red Hat OpenShift Data Foundation 4.13
• Multiple vulnerabilities in OpenShift Container Platform 4.12
• Ubuntu update for golang-yaml.v2
• Multiple vulnerabilities in IBM Storage Fusion and IBM Storage Fusion HCI
• Multiple vulnerabilities in IBM Cloud Pak for Watson AIOps
• Multiple vulnerabilities in Red Hat Ansible Automation Platform 2.4 for RHEL 9
• Multiple vulnerabilities in IBM Planning Analytics Connector for SAP