UBUNTU-CVE-2019-9503

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    UBUNTU-CVE-2019-9503

    Published: 12 Apr 2019Last Modified: 18 Aug 2026
    Upstream:
    CVE-2019-9503
    Aliases:
    USN-3979-1
    USN-3980-1
    USN-3980-2

    Summary:

    Details: The Broadcom brcmfmac WiFi driver prior to commit a4176ec356c73a46c07c181c6d04039fafa34a9f is vulnerable to a frame validation bypass. If the brcmfmac driver receives a firmware event frame from a remote source, the is_wlc_event_frame function will cause this frame to be discarded and unprocessed. If the driver receives the firmware event frame from the host, the appropriate handler is called. This frame validation can be bypassed if the bus used is USB (for instance by a wifi dongle). This can allow firmware event frames from a remote source to be processed. In the worst case scenario, by sending specially-crafted WiFi packets, a remote, unauthenticated attacker may be able to execute arbitrary code on a vulnerable system. More typically, this vulnerability will result in denial-of-service conditions.

    References: https://ubuntu.com/security/CVE-2019-9503, https://blog.quarkslab.com/reverse-engineering-broadcom-wireless-chipsets.html, https://ubuntu.com/security/notices/USN-3979-1, https://ubuntu.com/security/notices/USN-3980-1, https://ubuntu.com/security/notices/USN-3981-1, https://ubuntu.com/security/notices/USN-3980-2, https://ubuntu.com/security/notices/USN-3981-2, https://ubuntu.com/security/notices/USN-4076-1, https://ubuntu.com/security/notices/USN-4095-1, https://www.cve.org/CVERecord?id=CVE-2019-9503

    Affected packages

    Package

    Name: linux-azure

    Purl: pkg:deb/ubuntu/linux-azure?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.15.0-1045.49~14.04.1

    Affected versions

    4.15.0-1023.24~14.04.1
    4.15.0-1030.31~14.04.1
    4.15.0-1031.32~14.04.1
    4.15.0-1032.33~14.04.2
    4.15.0-1035.36~14.04.2
    4.15.0-1036.38~14.04.2
    4.15.0-1037.39~14.04.2
    4.15.0-1039.41~14.04.2
    4.15.0-1040.44~14.04.1
    4.15.0-1041.45~14.04.1
    4.15.0-1042.46~14.04.1

    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