Headline
CVE-2023-48707: Cleartext Storage of Sensitive Information in HMAC SHA256 Authentication
CodeIgniter Shield is an authentication and authorization provider for CodeIgniter 4. The secretKey value is an important key for HMAC SHA256 authentication and in affected versions was stored in the database in cleartext form. If a malicious person somehow had access to the data in the database, they could use the key and secretKey for HMAC SHA256 authentication to send requests impersonating that corresponding user. This issue has been addressed in version 1.0.0-beta.8. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Impact
secretKey, an important key for HMAC SHA256 authentication, was stored in the database in raw form.
If a malicious person somehow had access to the data in the database, they could use the key and secretKey for HMAC SHA256 authentication to send requests impersonating that person.
Patches
Upgrade to Shield v1.0.0-beta.8 or later.
After upgrading, all existing secret keys must be encrypted.
See https://github.com/codeigniter4/shield/blob/develop/UPGRADING.md for details.
Workarounds
None.
References
- https://codeigniter4.github.io/shield/references/authentication/hmac/
For more information
If you have any questions or comments about this advisory:
- Open an issue or discussion in codeigniter4/shield
- Email us at [email protected]