Horizon Alert
Summary of the vulnerability and why it matters
A code injection vulnerability in Vvveb's installation endpoint allows attackers to execute arbitrary PHP code. This means unauthorized individuals could potentially take control of your web server.
- Remote code execution possible.
- Affects installations that are not properly secured.
- Requires attacker to interact with installation endpoint.
Attack Path
How an attacker could exploit the issue
An unauthenticated attacker can exploit this vulnerability by sending a specially crafted POST request to the installation endpoint. This request will leverage the unsanitized `subdir` parameter to inject malicious PHP code directly into the `env.php` configuration file, leading to remote code execution on the web server.
- Targets installation endpoint.
- Exploits `subdir` parameter.
- Requires unpatched Vvveb.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability offers unauthenticated remote code execution, which is highly appealing to attackers. The ability to inject arbitrary PHP code directly into a configuration file without any authentication makes it a prime target. The ease of exploitation, requiring only a network connection and knowledge of the vulnerable endpoint, further increases its attractiveness.
- Unauthenticated RCE
- Exploitable over network
- Code injection in configuration
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
Prioritize identifying and isolating any Vvveb installations, especially those that may still have their installation endpoints accessible. The critical code injection vulnerability allows unauthenticated remote code execution, making immediate containment essential if patching is not feasible. Review logs for any unusual activity related to installation or configuration files.
- Block access to installation endpoints.
- Monitor for suspicious file writes.
- Consider disabling services if vulnerable.
