CVE-2022-35943

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)

How to fix CVE-2022-35943

To remediate CVE-2022-35943, upgrade the affected package to a fixed version below.

• —upgrade to 4.2.3 or later
• —upgrade to 1.0.0-beta.2 or later

Is CVE-2022-35943 being exploited?

Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 4.2.3
• >= 1.0.0-beta, < 1.0.0-beta.2

CVSS scores

References (7)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2022-35943
• PATCHgithub.com/codeigniter4/shield
• WEBcodeigniter4.github.io/userguide/libraries/security.htm
• WEBdeveloper.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie/SameSite