USN-3969-1: wpa_supplicant and hostapd vulnerability

Releases

• Ubuntu 19.04
• Ubuntu 18.10
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• wpa - client support for WPA and WPA2

Details

It was discovered that wpa_supplicant and hostapd incorrectly handled
unexpected fragments when using EAP-pwd. A remote 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 19.04

• hostapd - 2:2.6-21ubuntu3.1
• wpasupplicant - 2:2.6-21ubuntu3.1

Ubuntu 18.10

• hostapd - 2:2.6-18ubuntu1.2
• wpasupplicant - 2:2.6-18ubuntu1.2

Ubuntu 18.04

• hostapd - 2:2.6-15ubuntu2.3
• wpasupplicant - 2:2.6-15ubuntu2.3

Ubuntu 16.04

• hostapd - 1:2.4-0ubuntu6.5
• wpasupplicant - 2.4-0ubuntu6.5

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

References

• CVE-2019-11555

Related notices

• USN-3969-2: wpasupplicant, wpasupplicant-udeb, hostapd, wpagui, wpa