Unlimited transforms allowed for signed nodes
CVE-2021-39171

5.3MEDIUM

Key Information:

Vendor

Node-saml

Status
Passport-saml
Vendor
CVE Published:
27 August 2021

What is CVE-2021-39171?

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.

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Affected Version(s)

passport-saml < 3.1.0

References

https://github.com/node-saml/passport-saml/security/advis...
x_refsource_CONFIRM
https://github.com/node-saml/passport-saml/pull/595
x_refsource_MISC

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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