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BlueZ Advisory

Intel ID: INTEL-SA-00435
Advisory Category: Software
Impact of vulnerability: Escalation of Privilege, Information Disclosure
Severity rating: HIGH
Original release: 10/13/2020
Last revised: 10/15/2020

Summary: 

Potential security vulnerabilities in BlueZ may allow escalation of privilege or information disclosure.  BlueZ is releasing Linux kernel fixes to address these potential vulnerabilities.

Vulnerability Details:

CVEID: CVE-2020-12351

Description: Improper input validation in BlueZ may allow an unauthenticated user to potentially enable escalation of privilege via adjacent access.

CVSS Base Score:  8.3 High

CVSS Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

 

CVEID: CVE-2020-12352

Description: Improper access control in BlueZ may allow an unauthenticated user to potentially enable information disclosure via adjacent access.

CVSS Base Score:  5.3 Medium

CVSS Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

 

CVEID: CVE-2020-24490

Description: Improper buffer restrictions in BlueZ may allow an unauthenticated user to potentially enable denial of service via adjacent access.

CVSS Base Score:  5.3 Medium

CVSS Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

 

Affected Products:

All Linux kernel versions that support BlueZ.

Recommendations:

Intel recommends installing the following kernel fixes to address these issues:

https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-1-luiz.dentz@gmail.com/

https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-2-luiz.dentz@gmail.com/

https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-3-luiz.dentz@gmail.com/

https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-4-luiz.dentz@gmail.com/

https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=a2ec905d1e160a33b2e210e45ad30445ef26ce0e

 

Acknowledgements:

Intel would like to thank Andy Nguyen, security engineer from Google for reporting these issues.

Intel, and nearly the entire technology industry, follows a disclosure practice called Coordinated Disclosure, under which a cybersecurity vulnerability is generally publicly disclosed only after mitigations are available.

Revision History

Revision Date Description
1.0 10/13/2020 Initial Release
1.1 10/15/2020 Removed reference to Linux kernel version

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