Shuffle Master Deck Mate 2 Insecure Update Chain
Summary
| CVE | CVE-2025-34500 |
|---|---|
| State | PUBLISHED |
| Assigner | VulnCheck |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-10-24 23:15:46 UTC |
| Updated | 2026-10-08 11:10:00 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 7 HIGH from [email protected]
CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Problem Types: CWE-321 | CWE-327 | CWE-347 | CWE-321 CWE-321 Use of Hard-coded Cryptographic Key | CWE-327 CWE-327 Use of a Broken or Risky Cryptographic Algorithm | CWE-347 CWE-347 Improper Verification of Cryptographic Signature
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 7 | HIGH | CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/C... |
| 4.0 | CNA | CVSS | 7 | HIGH | CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
CVSS v4.0 Breakdown
CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Light Wonder Inc. SHFL Entertainment Inc. Shuffle Master Inc. | Deck Mate 2 | affected all known versions prior to 2025-10-23 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.ioactive.com/wp-content/uploads/2025/05/IOActive-card-shuffler-security.pdf | [email protected] | www.ioactive.com | |
| www.wired.com/story/how-hacked-card-shufflers-allegedly-enabled-a-mob-fuele... | [email protected] | www.wired.com | |
| www.wired.com/story/card-shuffler-hack | [email protected] | www.wired.com | |
| www.vulncheck.com/advisories/shuffle-master-deck-mate-2-insecure-update-chain | [email protected] | www.vulncheck.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Joseph Tartaro of IOActive (en)
CNA: Enrique Nissim of IOActive (en)
CNA: Ethan Shackelford of IOActive (en)
Additional Advisory Data
Solutions
CNA: Light & Wonder reports that it has deployed firmware updates addressing the update-chain weaknesses IOActive described (including fixes to the cryptographic integrity checks) and has disabled the USB update port on affected Deck Mate 2 units.