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: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1960018 1990225 1990226 1919278 1919279 1960016 1960017 1964967
Blocks: 1904532
TreeView+ depends on / blocked
 
Reported: 2021-01-21 08:01 UTC by Dhananjay Arunesh
Modified: 2021-09-15 05:47 UTC (History)
46 users (show)

Fixed In Version:
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Doc Text:
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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