Bluetooth interruption via zero CONNECT_IND interval
Published Jun 28, 2022 · Updated Sep 17, 2024
Divide-by-zero in Zephyr RTOS 1.14.0 and later, before 2.6.0, allows physically proximate attackers to interrupt Bluetooth operation. The ull_slave_setup function accepted a zero CONNECT_IND interval and continued connection setup, allowing subsequent controller arithmetic to divide by zero. A nearby Bluetooth Low Energy initiator needs no authentication or user interaction; the bounded consequence is a service interrupt.
Summary
What happened
Divide-by-zero in Zephyr RTOS 1.14.0 and later, before 2.6.0, allows physically proximate attackers to interrupt Bluetooth operation. The ull_slave_setup function accepted a zero CONNECT_IND interval and continued connection setup, allowing subsequent controller arithmetic to divide by zero. A nearby Bluetooth Low Energy initiator needs no authentication or user interaction; the bounded consequence is a service interrupt.
The record
- CVE
- CVE-2021-3432
- Published
- Jun 28, 2022
- Updated
- Sep 17, 2024
- Vendor
- Zephyr Project
- Product
- Zephyr RTOS
- Classifications
- CWE-369, T1499
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 28, 2022CVE publishedPublication date reported by the CVE source.
- Sep 17, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=v1.14.0 <unspecified
- Affected versionversion=v2.5.0 <unspecified
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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