Directus is a real-time API and App dashboard for managing SQL database content. Directus is vulnerable to Server-Side Request Forgery (SSRF) when importing a file from a remote web server (POST to `/files/import`). An attacker can bypass the security controls by performing a DNS rebinding attack and view sensitive data from internal servers or perform a local port scan. An attacker can exploit this vulnerability to access highly sensitive internal server(s) and steal sensitive information. This issue was fixed in version 9.23.0.

Affected: npm: directus

### Summary Directus versions <=9.22.4 is vulnerable to Server-Side Request Forgery (SSRF) when importing a file from a remote web server (POST to `/files/import`). An attacker can bypass the security controls that were implemented to patch vulnerability [CVE-2022-23080](https://security.snyk.io/vuln/SNYK-JS-DIRECTUS-2934713) by performing a [DNS rebinding attack](https://en.wikipedia.org/wiki/DNS_rebinding) and view sensitive data from internal servers or perform a local port scan (eg. can access internal metadata API for AWS at `http://169.254.169.254` event if `169.254.169.254` is in the deny IP list).

### Details DNS rebinding attacks work by running a DNS name server that resolves two different IP addresses when a domain is resolved simultaneously. This type of attack can be exploited to bypass the IP address deny list validation that was added to [`/api/src/services/file.ts`](https://github.com/directus/directus/blob/main/api/src/services/files.ts) for the function `importOne` to mitigate the previous SSRF vulnerability [CVE-2022-23080](https://security.snyk.io/vuln/SNYK-JS-DIRECTUS-2934713). The validation in [`/api/src/services/file.ts`](https://github.com/directus/directus/blob/main/api/src/services/files.ts) first checks if the resolved IP address for a domain name does not a resolve to an IP address in the deny list:

```js let ip = resolvedUrl.hostname;

if (net.isIP(ip) === 0) { try { ip = (await lookupDNS(ip)).address; } catch (err: any) {…