[USN-4098-1] wpa_supplicant and hostapd vulnerability

Marc Deslauriers marc.deslauriers at canonical.com
Wed Aug 14 13:58:08 UTC 2019

Ubuntu Security Notice USN-4098-1
August 14, 2019

wpa vulnerability

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

- Ubuntu 19.04
- Ubuntu 18.04 LTS


wpa_supplicant and hostapd could be made to expose sensitive information
over the network.

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.

Update instructions:

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

Ubuntu 19.04:
  hostapd                         2:2.6-21ubuntu3.2
  wpasupplicant                   2:2.6-21ubuntu3.2

Ubuntu 18.04 LTS:
  hostapd                         2:2.6-15ubuntu2.4
  wpasupplicant                   2:2.6-15ubuntu2.4

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


Package Information:

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