CVE-2022-35943

Vulnerability Description

Shield is an authentication and authorization framework for CodeIgniter 4. This vulnerability may allow [SameSite Attackers](https://canitakeyoursubdomain.name/) to bypass the [CodeIgniter4 CSRF protection](https://codeigniter4.github.io/userguide/libraries/security.html) mechanism with CodeIgniter Shield. For this attack to succeed, the attacker must have direct (or indirect, e.g., XSS) control over a subdomain site (e.g., `https://a.example.com/`) of the target site (e.g., `http://example.com/`). Upgrade to **CodeIgniter v4.2.3 or later** and **Shield v1.0.0-beta.2 or later**. As a workaround: set `Config\Security::$csrfProtection` to `'session,'`remove old session data right after login (immediately after ID and password match) and regenerate CSRF token right after login (immediately after ID and password match)

CVSS Score

Affected Products

Related Weaknesses (CWE)

References

• https://codeigniter4.github.io/userguide/libraries/security.htmBroken Link
• https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie/SameSiteThird Party Advisory
• https://github.com/codeigniter4/shield/security/advisories/GHSA-5hm8-vh6r-2cjqExploitMitigationThird Party Advisory
• https://jub0bs.com/posts/2021-01-29-great-samesite-confusionThird Party Advisory
• https://codeigniter4.github.io/userguide/libraries/security.htmBroken Link
• https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie/SameSiteThird Party Advisory
• https://github.com/codeigniter4/shield/security/advisories/GHSA-5hm8-vh6r-2cjqExploitMitigationThird Party Advisory
• https://jub0bs.com/posts/2021-01-29-great-samesite-confusionThird Party Advisory