CVE-2021-39171
5.3 · MEDIUMOverview
CVE-2021-39171 is a medium-severity vulnerability affecting passport-saml_project passport-saml. It was published on August 27, 2021 and has a CVSS 3.1 base score of 5.3 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
Passport-SAML is a SAML 2.0 authentication provider for Passport, the Node.js authentication library. Prior to version 3.1.0, a malicious SAML payload can require transforms that consume significant system resources to process, thereby resulting in reduced or denied service. This would be an effective way to perform a denial-of-service attack. This has been resolved in version 3.1.0. The resolution is to limit the number of allowable transforms to 2.
Remediation
Check the references section for vendor advisories and patches from passport-saml_project. Update passport-saml 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 |
|---|---|---|---|
| passport-saml_project | passport-saml | >= 0, < 3.1.0 | Affected |
Frequently Asked Questions
What is CVE-2021-39171?
CVE-2021-39171 is a medium-severity vulnerability affecting passport-saml_project passport-saml. It was published on August 27, 2021 and has a CVSS 3.1 base score of 5.3 (MEDIUM).
How severe is CVE-2021-39171?
This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-39171?
Check the references section for vendor advisories and patches from passport-saml_project. Update passport-saml 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-2021-39171?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-39171 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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