Description (CNA)
Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's FastCGI path splitting logic computes the split index on a lowercased copy of the request path and then uses that byte index to slice the original path. This is unsafe for Unicode because `strings.ToLower()` can change UTF-8 byte length for some characters. As a result, Caddy can derive an incorrect `SCRIPT_NAME`/`SCRIPT_FILENAME` and `PATH_INFO`, potentially causing a request that contains `.php` to execute a different on-disk file than intended (path confusion). In setups where an attacker can control file contents (e.g., upload features), this can lead to unintended PHP execution of non-.php files (potential RCE depending on deployment). Version 2.11.1 fixes the issue.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| caddyserver / caddy | affected < 2.11.1 |
CWE
CWE-20, CWE-180
References
- https://github.com/caddyserver/caddy/security/advisories/GHSA-5r3v-vc8m-m96g
- https://github.com/php/frankenphp/security/advisories/GHSA-g966-83w7-6w38
- https://github.com/caddyserver/caddy/releases/tag/v2.11.1
ADP enrichment
No English description supplied.
No references supplied.