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AUSCERT External Security Bulletin Redistribution
ESB-2020.3518.2
INTEL-SA-00435 BlueZ Advisory
16 October 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: BlueZ
Publisher: Intel
Operating System: Linux variants
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-24490 CVE-2020-12352 CVE-2020-12351
Original Bulletin:
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00435.html
Revision History: October 16 2020: Vendor updated advisory to remove reference to Linux kernel version
October 14 2020: Initial Release
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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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