CVE-2022-21647: Deserialization of Untrusted Data in Codeigniter4
First published: Tue Jan 04 2022(Updated: )
### Impact Deserialization of Untrusted Data was found in the `old()` function in CodeIgniter4. Remote attackers may inject auto-loadable arbitrary objects with this vulnerability, and possibly execute existing PHP code on the server. We are aware of a working exploit, which can lead to SQL injection. ### Patches Upgrade to v4.1.6 or later. ### Workarounds Do not use: - `old()` and form_helper - `RedirectResponse::withInput()` and `redirect()->withInput()` ### References - [PHP Object Injection | OWASP](https://owasp.org/www-community/vulnerabilities/PHP_Object_Injection) ### For more information If you have any questions or comments about this advisory: * Open an issue in [codeigniter4/CodeIgniter4](https://github.com/codeigniter4/CodeIgniter4/issues) * Email us at [SECURITY.md](https://github.com/codeigniter4/CodeIgniter4/blob/develop/SECURITY.md)
Credit: security-advisories@github.com security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| composer/codeigniter4/framework | <4.1.6 | |
| Codeigniter Codeigniter | >=4.0.0<4.1.6 | |
| composer/codeigniter4/framework | <4.1.6 | 4.1.6 |
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Reference Links
- https://github.com/codeigniter4/CodeIgniter4/security/advisories/GHSA-w6jr-wj64-mc9x
- https://github.com/codeigniter4/CodeIgniter4/commit/ce95ed5765256e2f09f3513e7d42790e0d6948f5
- https://nvd.nist.gov/vuln/detail/CVE-2022-21647
- https://github.com/FriendsOfPHP/security-advisories/blob/master/codeigniter4/framework/CVE-2022-21647.yaml
- https://github.com/advisories/GHSA-w6jr-wj64-mc9x (Advisory)
Frequently Asked Questions
What is CVE-2022-21647?
CVE-2022-21647 is a vulnerability found in the `old()` function in CodeIgniter4 that allows remote attackers to inject auto-loadable arbitrary objects and potentially execute existing PHP code on the server.
What is the severity of CVE-2022-21647?
The severity of CVE-2022-21647 is critical with a CVSS score of 9.8.
How does CVE-2022-21647 affect CodeIgniter4?
CVE-2022-21647 affects CodeIgniter4 versions up to and including 4.1.6.
How can an attacker exploit CVE-2022-21647?
An attacker can exploit CVE-2022-21647 by injecting auto-loadable arbitrary objects into the `old()` function and potentially executing PHP code on the server.
Are there any fixes or patches available for CVE-2022-21647?
Yes, patches and fixes for CVE-2022-21647 are available. It is recommended to update CodeIgniter4 to a version higher than 4.1.6.
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