Sonos Arc Ultra
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Security Grade
Calculator v
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Sonos Arc Ultra (Arc Ultra)
Brand: Sonos (Parent: Sonos, Inc.) Category: Soundbar (Wi-Fi / Bluetooth / HDMI eARC) • Model / Gen: Arc Ultra Release Date: 2024-10-01 • Status: In sale Classification Date: • Official Website | |
Contents
Security Evaluation
1. Device Security
| Criterion | Value | Proof | Comment |
|---|---|---|---|
| Known hardware tampering | Rare | 🔗 Proof | Sealed enclosure, no exposed debug or UART header documented; teardown is possible but leaves visible damage. |
| Known vulnerabilities | Very common | [1] [2] [3] 🔗 Proof | Three CVEs list all S1 and S2 systems before v16.6: SMB2 use-after-free, MPEG-TS parsing RCE and HLS out-of-bounds write, all found through Pwn2Own 2024. |
| Prior attacks | Rare | 🔗 Proof | Public PoC exists from the contest, but no botnet use, no CISA KEV entry and no mass exploitation observed. |
| Updatability | Very common | 🔗 Proof | Automatic OTA; the fix shipped in S2 83.1-61240 and the device checks for updates without user action. |
| Category Score | Score: 2 / 3 | ||
2. System Security
| Criterion | Value | Proof | Comment |
|---|---|---|---|
| Authentication with other systems | Partial | 🔗 Proof | Cloud and app sessions are paired and authenticated, but local SMB and media handling accept traffic from adjacent hosts without credentials. |
| Communications | Encrypted with obselete encryption | 🔗 Proof | Cloud traffic uses TLS, while local playback and firmware media parsing accept unauthenticated streams on the LAN. |
| Storage | Encrypted with obselete encryption | 🔗 Proof | Configuration and cached media live in flash with no published full-disk encryption; extraction requires physical access. |
| Category Score | Score: 2 / 3 | ||
3. User Authentication
| Criterion | Value | Proof | Comment |
|---|---|---|---|
| Account management | Basic | 🔗 Proof | One Sonos account per household with owner and member roles only; no per-device credentials or delegated administration. |
| Authentication | Basic | 🔗 Proof | Pairing authenticates setup, but the media parser is reachable before any authentication check. |
| Brute-force protection | Basic | 🔗 Proof | Account login has basic rate limiting; no documented lockout for repeated local API attempts. |
| Event logging | Partial logging | 🔗 Proof | Playback and app activity is visible in the app; no exportable security log and no syslog on the device. |
| Passwords | Require change after setup | 🔗 Proof | Account password is changeable and supports complexity requirements, but no forced rotation and no per-device secret. |
| Category Score | Score: 2 / 3 | ||
Technical Specifications
| Property | Details |
|---|---|
| Operating System & App | Sonos OS (Companion App: Sonos App) |
| Hardware (CPU / GPU) | CPU: • GPU: |
| Memory & Storage | Memory: • Storage: |
| Power, Battery & Charging | Battery: • Power: • Charging: |
| Display & Camera | Display: • Camera: |
| Sound & Connectivity | Sound: • Connectivity: Wi-Fi 6, Bluetooth 5.3, Ethernet, AirPlay 2 |
| Physical (Dimensions & Mass) | Dimensions: • Mass: |
