Microsoft Windows up to Server 2019 Bluetooth cryptographic issue

Summaryinfo

A vulnerability was found in Microsoft Windows. It has been declared as critical. Affected is an unknown function of the component Bluetooth. The manipulation results in cryptographic issue. This vulnerability was named CVE-2019-9506. The attack needs to be approached within the local network. There is no available exploit. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability, which was classified as critical, was found in Microsoft Windows (Operating System). Affected is some unknown processing of the component Bluetooth. The manipulation with an unknown input leads to a cryptographic issue vulnerability. CWE is classifying the issue as CWE-310. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was presented 08/13/2019 as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. The public release was coordinated in cooperation with the vendor. This vulnerability is traded as CVE-2019-9506 since 03/01/2019. Access to the local network is required for this attack to succeed. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1600. The advisory points out:

Executive Summary Microsoft is aware of the Bluetooth BR/EDR (basic rate/enhanced data rate, known as "Bluetooth Classic") key negotiation vulnerability that exists at the hardware specification level of any BR/EDR Bluetooth device. An attacker could potentially be able to negotiate the offered key length down to 1 byte of entropy, from a maximum of 16 bytes.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

See VDB-140090 for similar entry. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Microsoft

Name

• Windows

Version

• 7 SP1
• 8.1
• 10
• 10 1607
• 10 1703
• 10 1709
• 10 1803
• 10 1809
• 10 1903
• RT 8.1
• Server 1803
• Server 1903
• Server 2008 R2 SP1
• Server 2012
• Server 2012 R2
• Server 2016
• Server 2019

License

• commercial

Website

• Vendor: https://www.microsoft.com/
• Product: https://www.microsoft.com/en-us/windows

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Once again VulDB remains the best source for vulnerability data.

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