CVE-2020-14343
9.8 · CRITICALOverview
CVE-2020-14343 is a critical-severity vulnerability affecting pyyaml pyyaml. It was published on February 9, 2021 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. This flaw allows an attacker to execute arbitrary code on the system by abusing the python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747.
Remediation
Check the references section for vendor advisories and patches from pyyaml. Update pyyaml 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 |
|---|---|---|---|
| pyyaml | pyyaml | >= 5.1, < 5.4 | Affected |
References
Frequently Asked Questions
What is CVE-2020-14343?
CVE-2020-14343 is a critical-severity vulnerability affecting pyyaml pyyaml. It was published on February 9, 2021 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2020-14343?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2020-14343?
Check the references section for vendor advisories and patches from pyyaml. Update pyyaml 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-2020-14343?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-14343 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.
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