Moderate
CVE-2019-19195
CVE ID
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Moderate
(1 user assessed)
High
(1 user assessed)CVE-2019-19195
MITRE ATT&CK
Collection
Command and Control
Credential Access
Defense Evasion
Discovery
Execution
Exfiltration
Impact
Initial Access
Lateral Movement
Persistence
Privilege Escalation
Topic Tags
Description
The Bluetooth Low Energy implementation on Microchip Technology BluSDK Smart through 6.2 for ATSAMB11 devices does not properly restrict link-layer data length on reception, allowing attackers in radio range to cause a denial of service (crash) via a crafted packet.
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Ratings
-
Attacker ValueMedium
-
ExploitabilityHigh
Technical Analysis
This vuln is part of a related batch named SweynTooth from researchers at the Singapore University of Technology and Design. The SweynTooth vulnerabilities lie within certain Bluetooth Low Energy (BLE) SDKs for Systems-on-a-Chip (SoC), which can make proliferating fixes to affected devices in the field a slow going.
Vulnerable devices need to be within BLE radio range in order for an attacker to target. A successful exploit will crash the target by sending a “too short” link layer PDU. That said, the watchdog mechanism (enabled by default in the SDK) will notice and reboot the device, making this a short-lived Denial of Service for devices which have the watchdog enabled. A detailed explanation can be found here in the original disclosure, as well as some potentially vulnerable devices in this list. It appears the SoC manufacturer is still working on fixes for their vulnerable SDK(s).
EDIT: Attacker Value for this item largely depends on the type of device the vulnerable target is and behavior the device exhibits when successfully exploited.
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General Information
Vendors
- microchip
Products
- atmsamb11 blusdk smart
References
Additional Info
Technical Analysis
Report as Emergent Threat Response
Report as Exploited in the Wild
CVE ID
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