USN-2650-1: wpa_supplicant and hostapd vulnerabilities

16 June 2015

wpa, wpasupplicant vulnerabilities

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

  • Ubuntu 15.04
  • Ubuntu 14.10
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS


wpa_supplicant and hostapd could be made to crash if they received specially crafted network traffic.

Software Description

  • wpa - client support for WPA and WPA2
  • wpasupplicant - client support for WPA and WPA2


Kostya Kortchinsky discovered multiple flaws in wpa_supplicant and hostapd. A remote attacker could use these issues to cause wpa_supplicant or hostapd to crash, resulting in a denial of service. (CVE-2015-4141, CVE-2015-4142, CVE-2015-4143, CVE-2015-4144, CVE-2015-4145, CVE-2015-4146)

Update instructions

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

Ubuntu 15.04
hostapd - 2.1-0ubuntu7.2
wpasupplicant - 2.1-0ubuntu7.2
Ubuntu 14.10
hostapd - 2.1-0ubuntu4.2
wpasupplicant - 2.1-0ubuntu4.2
Ubuntu 14.04 LTS
hostapd - 2.1-0ubuntu1.3
wpasupplicant - 2.1-0ubuntu1.3
Ubuntu 12.04 LTS
wpasupplicant - 0.7.3-6ubuntu2.4

To update your system, please follow these instructions:

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