All versions of the package github.com/greenpau/caddy-security are vulnerable to Improper Validation of Array Index when parsing a Caddyfile. Multiple parsing functions in the affected library do not validate whether their input values are nil before attempting to access elements, which can lead to a panic (index out of range). Panics during the parsing of a configuration file may introduce ambiguity and vulnerabilities, hindering the correct interpretation and configuration of the web server.

References

• https://nvd.nist.gov/vuln/detail/CVE-2024-21493
• greenpau/caddy-security#263
• https://blog.trailofbits.com/2023/09/18/security-flaws-in-an-sso-plugin-for-caddy
• https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMGREENPAUCADDYSECURITY-5961078