CVE-2025-34500
Severity CVSS v4.0:
HIGH
Type:
CWE-321
Use of Hard-coded Cryptographic Key
Publication date:
24/10/2025
Last modified:
27/10/2025
Description
Deck Mate 2's firmware update mechanism accepts packages without cryptographic signature verification, encrypts them with a single hard-coded AES key shared across devices, and uses a truncated HMAC for integrity validation. Attackers with access to the update interface - typically via the unit's USB update port - can craft or modify firmware packages to execute arbitrary code as root, allowing persistent compromise of the device's integrity and deck randomization process. Physical or on-premises access remains the most likely attack path, though network-exposed or telemetry-enabled deployments could theoretically allow remote exploitation if misconfigured. The vendor confirmed that firmware updates have been issued to correct these update-chain weaknesses and that USB update access has been disabled on affected units.
Impact
Base Score 4.0
7.00
Severity 4.0
HIGH
References to Advisories, Solutions, and Tools
- https://www.ioactive.com/wp-content/uploads/2025/05/IOActive-card-shuffler-security.pdf
- https://www.vulncheck.com/advisories/shuffle-master-deck-mate-2-insecure-update-chain
- https://www.wired.com/story/card-shuffler-hack/
- https://www.wired.com/story/how-hacked-card-shufflers-allegedly-enabled-a-mob-fueled-poker-scam-that-rocked-the-nba/