JWT Signature Leak Vulnerability in Auth0 WCF Service
CVE-2019-7644

9.8CRITICAL

Key Information:

Vendor

Auth0

Status
Auth0-wcf-service-jwt
Vendor
CVE Published:
11 April 2019

What is CVE-2019-7644?

The Auth0 WCF Service prior to version 1.0.4 contains a vulnerability that leaks the expected JWT signature through error messages. This can potentially be exploited by attackers who gain access to these messages, enabling them to forge arbitrary JWT tokens that are accepted by the vulnerable application. This issue emphasizes the need for secure error handling to prevent sensitive information disclosure.

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References

https://auth0.com/docs/security/bulletins/cve-2019-7644
x_refsource_MISC

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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