CVE-2023-45141
Go Fiber CSRF Token Validation Vulnerability
Impact
A Cross-Site Request Forgery (CSRF) vulnerability has been identified in the application, which allows an attacker to obtain tokens and forge malicious requests on behalf of a user. This can lead to unauthorized actions being taken on the user's behalf, potentially compromising the security and integrity of the application. ## Vulnerability Details The vulnerability is caused by improper validation and enforcement of CSRF tokens within the application. The following issues were identified: 1. **Lack of Token Association**: The CSRF token was validated against tokens in storage but was not tied to the original requestor that generated it, allowing for token reuse. ## Remediation To remediate this vulnerability, it is recommended to take the following actions: 1. **Update the Application**: Upgrade the application to a fixed version with a patch for the vulnerability. 2. **Implement Proper CSRF Protection**: Review the updated documentation and ensure your application's CSRF protection mechanisms follow best practices. 4. **Choose CSRF Protection Method**: Select the appropriate CSRF protection method based on your application's requirements, either the Double Submit Cookie method or the Synchronizer Token Pattern using sessions. 5. **Security Testing**: Conduct a thorough security assessment, including penetration testing, to identify and address any other security vulnerabilities. ## Defence-in-depth Users should take additional security measures like captchas or Two-Factor Authentication (2FA) and set Session cookies with SameSite=Lax or SameSite=Strict, and the Secure and HttpOnly attributes.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/gofiber/fiber/v2 | < 2.50.0 | 2.50.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Gofiber | Fiber | before 2.50.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/gofiber/fiber/security/advisories/GHSA-mv73-f69x-444p
- https://github.com/advisories/GHSA-mv73-f69x-444p
- https://nvd.nist.gov/vuln/detail/CVE-2023-45141
- https://github.com/gofiber/fiber/commit/8c3916dbf4ad2ed427d02c6eb63ae8b2fa8f019a
- https://github.com/gofiber/fiber/commit/b50d91d58ecdff2a330bf07950244b6c4caf65b1