Bug 1918601 (CVE-2020-26555) - CVE-2020-26555 kernel: Bluetooth BR/EDR PIN Pairing procedure is vulnerable to an impersonation attack
Summary: CVE-2020-26555 kernel: Bluetooth BR/EDR PIN Pairing procedure is vulnerable t...
Keywords:
Status: NEW
Alias: CVE-2020-26555
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Nobody
QA Contact:
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Depends On: 1919278 1919279 1960016 1960017 1960018 1964967 1990225 1990226
Blocks: 1904532
TreeView+ depends on / blocked
 
Reported: 2021-01-21 08:01 UTC by Dhananjay Arunesh
Modified: 2023-12-06 11:14 UTC (History)
65 users (show)

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A vulnerability was found in Linux Kernel, where Bluetooth BR/EDR PIN Pairing procedure is vulnerable to an impersonation attack. When an attacker connects to a victim device using the address of the device and the victim initiates a Pairing, the attacker can reflect the encrypted nonce even without knowledge of the key.
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Description Dhananjay Arunesh 2021-01-21 08:01:51 UTC 
A vulnerability was found in Linux Kernel, where Bluetooth BR/EDR PIN Pairing procedure is vulnerable to an impersonation attack. When an attacker connects to a victim device using the address of the device and the victim initiates a Pairing, the attacker can reflect the encrypted nonce even without knowledge of the key.
Comment 6 Rohit Keshri 2021-05-12 19:29:34 UTC 
Mitigation:

It is recommended that devices not accept connections from or initiate connections to remote devices claiming the same Bluetooth device address as their own, also a controller computing a null (zero-valued) combination not accept this key as a valid and fail any pairing attempt that produced a null key.

It is also recommends that BR/EDR implementations enable Secure Simple Pairing, and where possible, implementations enable and enforce Secure Connections Only Mode, ensuring that pin-code pairing cannot be used.
Comment 10 Rohit Keshri 2021-05-26 12:56:58 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1964967]
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