Ubuntu 3944-1: wpa_supplicant and hostapd vulnerabilities

    Date10 Apr 2019
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in wpa_supplicant and hostapd.
    Ubuntu Security Notice USN-3944-1
    April 10, 2019
    wpa vulnerabilities
    A security issue affects these releases of Ubuntu and its derivatives:
    - Ubuntu 18.10
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    - Ubuntu 14.04 LTS
    Several security issues were fixed in wpa_supplicant and hostapd.
    Software Description:
    - wpa: client support for WPA and WPA2
    It was discovered that wpa_supplicant and hostapd were vulnerable to a
    side channel attack against EAP-pwd. A remote attacker could possibly use
    this issue to recover certain passwords. (CVE-2019-9495)
    Mathy Vanhoef discovered that wpa_supplicant and hostapd incorrectly
    validated received scalar and element values in EAP-pwd-Commit messages. A
    remote attacker could possibly use this issue to perform a reflection
    attack and authenticate without the appropriate password. (CVE-2019-9497,
    CVE-2019-9498, CVE-2019-9499)
    It was discovered that hostapd incorrectly handled obtaining random
    numbers. In rare cases where the urandom device isn't available, it would
    fall back to using a low-quality PRNG. This issue only affected Ubuntu
    14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-10743)
    Update instructions:
    The problem can be corrected by updating your system to the following
    package versions:
    Ubuntu 18.10:
      hostapd                         2:2.6-18ubuntu1.1
      wpasupplicant                   2:2.6-18ubuntu1.1
    Ubuntu 18.04 LTS:
      hostapd                         2:2.6-15ubuntu2.2
      wpasupplicant                   2:2.6-15ubuntu2.2
    Ubuntu 16.04 LTS:
      hostapd                         2.4-0ubuntu6.4
      wpasupplicant                   2.4-0ubuntu6.4
    Ubuntu 14.04 LTS:
      hostapd                         2.1-0ubuntu1.7
      wpasupplicant                   2.1-0ubuntu1.7
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
      CVE-2016-10743, CVE-2019-9495, CVE-2019-9497, CVE-2019-9498,
    Package Information:
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