CVE-2020-7787

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Summary

CVECVE-2020-7787
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-12-09 17:15:00 UTC
Updated2020-12-11 17:01:00 UTC
DescriptionThis affects all versions of package react-adal. It is possible for a specially crafted JWT token and request URL can cause the nonce, session and refresh values to be incorrectly validated, causing the application to treat an attacker-generated JWT token as authentic. The logical defect is caused by how the nonce, session and refresh values are stored in the browser local storage or session storage. Each key is automatically appended by ||. When the received nonce and session keys are generated, the list of values is stored in the browser storage, separated by ||, with || always appended to the end of the list. Since || will always be the last 2 characters of the stored values, an empty string ("") will always be in the list of the valid values. Therefore, if an empty session parameter is provided in the callback URL, and a specially-crafted JWT token contains an nonce value of "" (empty string), then adal.js will consider the JWT token as authentic.

Risk And Classification

Problem Types: CWE-287

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application React-adal Project React-adal All All All All
Application React-adal Project React-adal All All All All

References

ReferenceSourceLinkTags
ADAL.js update by krishardy · Pull Request #115 · salvoravida/react-adal · GitHub MISC github.com Exploit, Third Party Advisory
Improper Authentication in react-adal | Snyk MISC snyk.io Exploit, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

LEGACY: Kris Hardy

Legacy QID Mappings

  • 982777 Nodejs (npm) Security Update for react-adal (GHSA-7mpx-vg3c-cmr4)

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