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Learn morePKCE Downgrade in Spring Authorization Server
Description
Spring Authorization Server is susceptible to a PKCE Downgrade Attack for Confidential Clients.
Specifically, an application is vulnerable when a Confidential Client uses PKCE for the Authorization Code Grant.
An application is not vulnerable when a Public Client uses PKCE for the Authorization Code Grant.
Affected Spring Products and Versions
Spring Authorization Server:
- 1.2.0 - 1.2.2
- 1.1.0 - 1.1.5
- 1.0.5 and earlier
Mitigation
Users of affected versions should upgrade to the corresponding fixed version.
| Fix version | Availability |
|---|---|
| 1.2.3 | OSS |
| 1.1.6 | OSS |
| 1.0.6 | Enterprise Support Only |
No further mitigation steps are necessary.
Credit
This issue was identified and responsibly reported by Pieter Philippaerts ([email protected]).
History
- 2024-03-19: Initial vulnerability report published.
Reporting a vulnerability
To report a security vulnerability for a project within the Spring portfolio, see the Security Policy
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