CVE-2020-15802
First published: Fri Sep 11 2020(Updated: )
Devices supporting Bluetooth before 5.1 may allow man-in-the-middle attacks, aka BLURtooth. Cross Transport Key Derivation in Bluetooth Core Specification v4.2 and v5.0 may permit an unauthenticated user to establish a bonding with one transport, either LE or BR/EDR, and replace a bonding already established on the opposing transport, BR/EDR or LE, potentially overwriting an authenticated key with an unauthenticated key, or a key with greater entropy with one with less.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Bluetooth Bluetooth Core Specification | <5.1 | |
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Reference Links
- https://android.googlesource.com/platform/system/bt/+/775a5e72b34b70ff92d61d8bcc47c6bde663f02e
- https://source.android.com/docs/security/bulletin/2020-12-01 (Advisory)
- https://gizmodo.com/bluetooth-unveils-its-latest-security-issue-with-no-se-1845013709
- https://www.bluetooth.com/learn-about-bluetooth/bluetooth-technology/bluetooth-security/blurtooth/
- https://www.kb.cert.org/vuls/id/589825
Frequently Asked Questions
What is CVE-2020-15802?
CVE-2020-15802 is a vulnerability that allows man-in-the-middle attacks on devices supporting Bluetooth before version 5.1, also known as BLURtooth.
What is the severity of CVE-2020-15802?
The severity of CVE-2020-15802 is high, with a severity value of 5.9.
Which devices are affected by CVE-2020-15802?
Devices supporting Bluetooth before version 5.1, such as Google Android, are affected by CVE-2020-15802.
How does CVE-2020-15802 work?
CVE-2020-15802 allows an unauthenticated user to establish a bonding with one transport (either LE or BR/EDR) and replace an existing bonding.
Is there a fix for CVE-2020-15802?
Yes, patching the affected devices to a version of Bluetooth 5.1 or newer will mitigate the vulnerability.
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