CVE-2019-7644
Critical
Description
Auth0 Auth0-WCF-Service-JWT before 1.0.4 leaks the expected JWT signature in an error message when it cannot successfully validate the JWT signature. If this error message is presented to an attacker, they can forge an arbitrary JWT token that will be accepted by the vulnerable application.
SeverityCritical
CVSS9.8
Exploit probability77. percentile1.7%
Product
Auth0-wcf-service-jwt
PublishedApr 11, 2019
First seenApr 11, 2019
How to fix
Update
- auth0 auth0-wcf-service-jwt1.0.4 or later
- Auth0-WCF-Service-JWT1.0.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| auth0 auth0-wcf-service-jwt | v < 1.0.4 | 1.0.4 |
| Auth0-WCF-Service-JWTNuGet | v < 1.0.4 | 1.0.4 |
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