Suite CRM v7.14.2 - RCE via LFI

Summary

Vulnerability

Description

Suite CRM version 7.14.2 allows including local php files. This is possible because the application is vulnerable to LFI.

Vulnerability

A local file inclusion (LFI) vulnerability has been identified in Suite CRM that, under certain conditions, could allow an attacker to obtain remote command execution. The attacker must have minimum privileges.

Vulnerable path

Below I will show you the vulnerable path in code, from the source to the sink.

// Index.php use App\Kernel; use Symfony\Component\ErrorHandler\Debug; use Symfony\Component\HttpFoundation\Request; [...] $legacyRoute = $kernel->getLegacyRoute($request);

if (!empty($legacyRoute)) {

    $path = './legacy';
    if (!empty($legacyRoute['dir'])) {
        $path .= '/' . $legacyRoute['dir'];
    }

    chdir($path);

    $access = $legacyRoute['access'] ?? false;
    if ($access === false) {
        http_response_code(404);
        exit;
    }

    if (file_exists($legacyRoute['file'])) {

        /* @noinspection PhpIncludeInspection */
        require $legacyRoute['file']; // Vulnerability Here
    } else {

        http_response_code(404);
        exit;
    }

}
[...]

// Kernel.php public function getLegacyRoute(Request $request): array { $this->initializeBundles(); $this->initializeContainer(); if ($this->container->has('legacy.route.handler')) { return $this->container->get('legacy.route.handler')->getLegacyRoute($request);
    }

    return [];
}

// LegacyRouteHandler.php public function getLegacyRoute(Request $request): array { [...] if ($this->isLegacyNonViewActionRoute($request)) { return $this->legacyNonViewActionRedirectHandler->getIncludeFile($request);
    }

    [...]
}

// LegacyRedirectHandler.php public function getIncludeFile(Request $request): array { $baseUrl = $request->getPathInfo(); // Anything after the index.php file $baseUrl = substr($baseUrl, 1); if (strpos($baseUrl, '.php') === false) { $baseUrl .= 'index.php'; } return [ 'dir' => '', 'file' => $baseUrl, // Arbitrary path (with custom wrapper) 'access' => true
    ];
}

Evidence of exploitation

Create a product and upload a malicious image

Include the image from the previous step with the LFI to achieve RCE

Our security policy

We have reserved the ID CVE-2024-1644 to refer to this issue from now on.

• https://fluidattacks.com/advisories/policy/

System Information

• Version: Suite CRM 7.14.2

• Operating System: MacOS

Mitigation

There is currently no patch available for this vulnerability.

Credits

The vulnerability was discovered by Carlos Bello from Fluid Attacks' Offensive Team.

References

Vendor page https://github.com/salesagility/SuiteCRM/

Timeline