Ubuntu 4136-1: wpa_supplicant and hostapd vulnerability

    Date18 Sep 2019
    CategoryUbuntu
    244
    Posted ByLinuxSecurity Advisories
    wpa_supplicant could be made to be disconnected and require reconnection to the network if it received a specially crafted management frame.
    ==========================================================================
    Ubuntu Security Notice USN-4136-1
    September 18, 2019
    
    wpa vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 19.04
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    
    Summary:
    
    wpa_supplicant could be made to be disconnected and require reconnection to the
    network if it received a specially crafted management frame.
    
    Software Description:
    - wpa: client support for WPA and WPA2
    
    Details:
    
    It was discovered that wpa_supplicant incorrectly handled certain management
    frames. An attacker could possibly use this issue to cause a denial of service.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 19.04:
      hostapd                         2:2.6-21ubuntu3.3
      wpasupplicant                   2:2.6-21ubuntu3.3
    
    Ubuntu 18.04 LTS:
      hostapd                         2:2.6-15ubuntu2.5
      wpasupplicant                   2:2.6-15ubuntu2.5
    
    Ubuntu 16.04 LTS:
      hostapd                         1:2.4-0ubuntu6.6
      wpasupplicant                   2.4-0ubuntu6.6
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4136-1
      CVE-2019-16275
    
    Package Information:
      https://launchpad.net/ubuntu/+source/wpa/2:2.6-21ubuntu3.3
      https://launchpad.net/ubuntu/+source/wpa/2:2.6-15ubuntu2.5
      https://launchpad.net/ubuntu/+source/wpa/2.4-0ubuntu6.6
    
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