A vulnerability was found in McDonalds Self-Service Machine (the affected version unknown). It has been declared as critical. Affected by this vulnerability is an unknown part of the component Burger Handler. The manipulation with an unknown input leads to a privileges management vulnerability (Hamburglar). The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was disclosed 04/08/2019 by Hamburglar Bourne as Free Food from Maccas as confirmed video (Youtube). The advisory is shared at youtu.be. The public release happened without involvement of McDonalds. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details are unknown but a public exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/08/2020). MITRE ATT&CK project uses the attack technique T1068 for this issue. Due to its background and reception, this vulnerability has a historic impact.

A public exploit has been developed by Hamburglar Bourne and been published immediately after the advisory. It is possible to download the exploit at youtu.be. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Additional details are provided at mashable.com.

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• McDonalds

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• Self-Service Machine

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