Dennis and I already published blog posts about our research project dealing with vulnerabilities in parcel tracking implementations at DHL and DPD. At the Winterkongress (winter congress) in Winterthur, Switzerland, we had the great opportunity to give a talk about the matter. The talk was recorded and can be watched here.
DigiGes held the Winterkongress, which took place in Winterthur on 01.03. till 02.03.2024. The main topics are ethics, threats, and opportunities of IT. This year, many talks looked at AI in some way.
This blog post is the continuation of our parcel research. We already reported
about how we broke parcel tracking at
DHL
and the disclosure process of the identified problems. As DHL is not the only
parcel service in Germany, we also investigated the other available parcel
services. In this blog post, we want to talk about DPD, also called Geopost,
which belongs to the French Post Office.
Efficient Guessing of Tracking Numbers
DPD uses the recipient’s ZIP code to unlock detailed shipment information and
additional options. After trying some ZIP codes manually, we received CAPTCHA
prompts in the web interface (more on this later).