Ubuntu 4136-2: wpa_supplicant and hostapd vulnerability

    Date18 Sep 2019
    CategoryUbuntu
    322
    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-4136-2
    September 18, 2019
    
    wpa, wpasupplicant vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.04 ESM
    - Ubuntu 12.04 ESM
    
    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
    - wpasupplicant: client support for WPA and WPA2
    
    Details:
    
    USN-4136-1 fixed a vulnerability in wpa_supplicant. This update provides
    the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.
    
    Original advisory 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 14.04 ESM:
      hostapd                         1:2.1-0ubuntu1.7+esm2
      wpasupplicant                   2.1-0ubuntu1.7+esm2
    
    Ubuntu 12.04 ESM:
      wpasupplicant                   0.7.3-6ubuntu2.5
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4136-2
      https://usn.ubuntu.com/4136-1
      CVE-2019-16275
    
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