Moderate
CVE-2019-17519
CVE ID
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Moderate
(1 user assessed)
High
(1 user assessed)CVE-2019-17519
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 NXP SDK through 2.2.1 for KW41Z devices does not properly restrict the Link Layer payload length, allowing attackers in radio range to cause a buffer overflow 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 leave the target in a crashed or non-functional state via a Buffer Overflow (BOF), triggered by sending a packet with a large Link Layer Length value. While a simple attack results in a denial-of-service (DoS), the nature of the vulnerability being a BOF leaves the door open for further exploration to potentially gain code execution on a target. 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 has issued fixes for their vulnerable SDK(s).
Related, the same researchers found an SoC from Cypress which also contained a similar vulnerability (CVE-2019-16336), also disclosed as part of SweynTooth.
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
- nxp
Products
- mcuxpresso software development kit
References
Miscellaneous
Additional Info
Technical Analysis
Report as Emergent Threat Response
Report as Exploited in the Wild
CVE ID
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