CVE-2021-20319
7.8 · HIGHOverview
CVE-2021-20319 is a high-severity vulnerability affecting redhat coreos-installer. It was published on March 4, 2022 and has a CVSS 3.1 base score of 7.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
An improper signature verification vulnerability was found in coreos-installer. A specially crafted gzip installation image can bypass the image signature verification and as a consequence can lead to the installation of unsigned content. An attacker able to modify the original installation image can write arbitrary data, and achieve full access to the node being installed.
Remediation
Check the references section for vendor advisories and patches from redhat. Update coreos-installer to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| redhat | coreos-installer | >= 0, < 0.10.1 | Affected |
References
Frequently Asked Questions
What is CVE-2021-20319?
CVE-2021-20319 is a high-severity vulnerability affecting redhat coreos-installer. It was published on March 4, 2022 and has a CVSS 3.1 base score of 7.8 (HIGH).
How severe is CVE-2021-20319?
This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-20319?
Check the references section for vendor advisories and patches from redhat. Update coreos-installer to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-20319?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-20319 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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