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Ubuntu Security Notice USN-3455-1
October 16, 2017

wpa vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in wpa_supplicant.

Software Description:
- wpa: client support for WPA and WPA2

Details:

Mathy Vanhoef discovered that wpa_supplicant and hostapd incorrectly
handled WPA2. A remote attacker could use this issue with using key
reinstallation attacks to obtain sensitive information. (CVE-2017-13077,
CVE-2017-13078, CVE-2017-13079, CVE-2017-13080, CVE-2017-13081,
CVE-2017-13082, CVE-2017-13086, CVE-2017-13087, CVE-2017-13088)

Imre Rad discovered that wpa_supplicant and hostapd incorrectly handled
invalid characters in passphrase parameters. A remote attacker could use
this issue to cause a denial of service. (CVE-2016-4476)

Imre Rad discovered that wpa_supplicant and hostapd incorrectly handled
invalid characters in passphrase parameters. A local attacker could use
this issue to cause a denial of service, or possibly execute arbitrary
code. (CVE-2016-4477)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 17.04:
  hostapd                         2.4-0ubuntu9.1
  wpasupplicant                   2.4-0ubuntu9.1

Ubuntu 16.04 LTS:
  hostapd                         2.4-0ubuntu6.2
  wpasupplicant                   2.4-0ubuntu6.2

Ubuntu 14.04 LTS:
  hostapd                         2.1-0ubuntu1.5
  wpasupplicant                   2.1-0ubuntu1.5

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
  https://www.ubuntu.com/usn/usn-3455-1
  CVE-2016-4476, CVE-2016-4477, CVE-2017-13077, CVE-2017-13078,
  CVE-2017-13079, CVE-2017-13080, CVE-2017-13081, CVE-2017-13082,
  CVE-2017-13086, CVE-2017-13087, CVE-2017-13088

Package Information:
  https://launchpad.net/ubuntu/+source/wpa/2.4-0ubuntu9.1
  https://launchpad.net/ubuntu/+source/wpa/2.4-0ubuntu6.2
  https://launchpad.net/ubuntu/+source/wpa/2.1-0ubuntu1.5