Resource exhaustion in Node-Saml Passport-Saml
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.013 (69.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- Node-Saml Passport-Saml — versions < 3.1.0
- Passport-Saml Project
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/node-saml/passport-saml/security/advisories/GHSA-5379-r78w-42h2 (Third Party Advisory)
- github.com/node-saml/passport-saml/pull/595 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-39171?
- CVE-2021-39171 is a medium-severity vulnerability in Node-Saml Passport-Saml, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2021-08-27.
- How severe is CVE-2021-39171?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2021-39171 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.