CVE-2021-4120
8.2 · HIGHOverview
CVE-2021-4120 is a high-severity vulnerability affecting canonical snapd. It was published on February 17, 2022 and has a CVSS 3.1 base score of 8.2 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical Description
snapd 2.54.2 fails to perform sufficient validation of snap content interface and layout paths, resulting in the ability for snaps to inject arbitrary AppArmor policy rules via malformed content interface and layout declarations and hence escape strict snap confinement. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1
Remediation
Check the references section for vendor advisories and patches from canonical. Update snapd 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 |
|---|---|---|---|
| canonical | snapd | 0 | Affected |
References
Frequently Asked Questions
What is CVE-2021-4120?
CVE-2021-4120 is a high-severity vulnerability affecting canonical snapd. It was published on February 17, 2022 and has a CVSS 3.1 base score of 8.2 (HIGH).
How severe is CVE-2021-4120?
This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-4120?
Check the references section for vendor advisories and patches from canonical. Update snapd 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-2021-4120?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-4120 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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