The latest security information on Intel® products.

BlueZ Advisory

Intel ID: INTEL-SA-00517
Advisory Category: Software
Impact of vulnerability: Information Disclosure
Severity rating: MEDIUM
Original release: 06/08/2021
Last revised: 06/08/2021

Summary: 

Potential security vulnerabilities in BlueZ may allow information disclosure.  BlueZ is releasing Linux kernel Bluetooth subsystem updates to mitigate these potential vulnerabilities.

Vulnerability Details:

CVEID:  CVE-2021-0129

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

CVSS Base Score: 6.4 Medium

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

 

CVEID:  CVE-2020-26558 (Non-Intel issued)

Description: Bluetooth LE and BR/EDR secure pairing in Bluetooth Core Specification 2.1 through 5.2 may permit a nearby man-in-the-middle attacker to identify the Passkey used during pairing (in the Passkey authentication procedure) by reflection of the public key and the authentication evidence of the initiating device, potentially permitting this attacker to complete authenticated pairing with the responding device using the correct Passkey for the pairing session. The attack methodology determines the Passkey value one bit at a time.

CVSS Base Score: 4.2 Medium

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

Affected Products:

All Linux kernel versions prior to 5.13 that support BlueZ.

Recommendations:

Intel recommends installing the following kernel fix and BlueZ update to address these issues:

https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/net/bluetooth/smp.c?id=6d19628f539fccf899298ff02ee4c73e4bf6df3f

 

https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=00da0fb4972cf59e1c075f313da81ea549cb8738

Or use the following BlueZ releases which already incorporate the fixes:

·         kernel: 5.13

·         userspace:  http://www.bluez.org/release-of-bluez-5-58-and-5-57/

Acknowledgements:

Intel would like to thank Agence Nationale de Securite des Systemes d'Information (ANSSI) for reporting CVE-2021-0129.

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 06/08/2021 Initial Release

Legal Notices and Disclaimers

Intel provides these materials as-is, with no express or implied warranties.

All products, dates, and figures specified are preliminary based on current expectations, and are subject to change without notice.

Intel, processors, chipsets, and desktop boards may contain design defects or errors known as errata, which may cause the product to deviate from published specifications. Current characterized errata are available on request.

Intel technologies’ features and benefits depend on system configuration and may require enabled hardware, software or service activation. Performance varies depending on system configuration. No computer system can be absolutely secure. Check with your system manufacturer or retailer or learn more at https://intel.com.

Some results have been estimated or simulated using internal Intel analysis or architecture simulation or modeling, and provided to you for informational purposes. Any differences in your system hardware, software or configuration may affect your actual performance.

Intel and the Intel logo are trademarks of Intel Corporation in the United States and other countries.

*Other names and brands may be claimed as the property of others.
Copyright © Intel Corporation 2020

Report a Vulnerability

If you have information about a security issue or vulnerability with an Intel branded product or technology, please send an e-mail to secure@intel.com. Encrypt sensitive information using our PGP public key.

Please provide as much information as possible, including:

  • The products and versions affected
  • Detailed description of the vulnerability
  • Information on known exploits

A member of the Intel Product Security Team will review your e-mail and contact you to collaborate on resolving the issue. For more information on how Intel works to resolve security issues, see:

For issues related to Intel's external web presence (Intel.com and related subdomains), please contact Intel's External Security Research team.

Need product support?

If you...

  • Have questions about the security features of an Intel product
  • Require technical support
  • Want product updates or patches


Please visit Support & Downloads.