CVE-2022-35943
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.58%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.58% probability · 46th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-352
- Affected
- codeigniter/codeigniter · codeigniter/shield
- Source
- security-advisories@github.com
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-2cjqExploit, Mitigation, Third 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-2cjqExploit, Mitigation, Third Party Advisory
- https://jub0bs.com/posts/2021-01-29-great-samesite-confusionThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.