CVE-2019-9506

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    CVE-2019-9506

    Published: 14 Aug 2019Last Modified: 15 Mar 2026

    Summary:

    Details: The Bluetooth BR/EDR specification up to and including version 5.1 permits sufficiently low encryption key length and does not prevent an attacker from influencing the key length negotiation. This allows practical brute-force attacks (aka "KNOB") that can decrypt traffic and inject arbitrary ciphertext without the victim noticing.

    References: https://access.redhat.com/errata/RHSA-2019:3220, https://access.redhat.com/errata/RHSA-2019:3218, https://access.redhat.com/errata/RHSA-2019:3517, https://www.usenix.org/conference/usenixsecurity19/presentation/antonioli, https://usn.ubuntu.com/4118-1/, https://www.kb.cert.org/vuls/id/918987/, https://access.redhat.com/errata/RHSA-2019:3309, https://lists.debian.org/debian-lts-announce/2019/09/msg00014.html, http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00037.html, http://seclists.org/fulldisclosure/2019/Aug/13, http://seclists.org/fulldisclosure/2019/Aug/14, https://access.redhat.com/errata/RHSA-2019:3055, https://access.redhat.com/errata/RHSA-2019:3217, https://access.redhat.com/errata/RHSA-2019:3231, https://access.redhat.com/errata/RHSA-2019:2975, https://access.redhat.com/errata/RHSA-2019:3165, https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html, http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00036.html, http://seclists.org/fulldisclosure/2019/Aug/11, https://usn.ubuntu.com/4115-1/, https://usn.ubuntu.com/4147-1/, https://www.bluetooth.com/security/statement-key-negotiation-of-bluetooth/, http://seclists.org/fulldisclosure/2019/Aug/15, http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20190828-01-knob-en, https://access.redhat.com/errata/RHSA-2019:3076, https://access.redhat.com/errata/RHSA-2019:3089, https://access.redhat.com/errata/RHSA-2019:3187, https://access.redhat.com/errata/RHSA-2020:0204, https://lists.debian.org/debian-lts-announce/2019/09/msg00015.html, http://www.cs.ox.ac.uk/publications/publication12404-abstract.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2019-9506 | CVE-DB