CVE-2021-39171

Unlimited transforms allowed for signed nodes

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.

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.36%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: node-saml passport-saml
Published at:
Updated at:

References

Link Tags
https://github.com/node-saml/passport-saml/security/advisories/GHSA-5379-r78w-42h2 third party advisory
https://github.com/node-saml/passport-saml/pull/595 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-39171?
CVE-2021-39171 has been scored as a medium severity vulnerability.
How to fix CVE-2021-39171?
To fix CVE-2021-39171, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-39171 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-39171 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-39171?
CVE-2021-39171 affects node-saml passport-saml.
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