USN-3969-1: wpa_supplicant and hostapd vulnerability

wpa vulnerability

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

Ubuntu 19.04
Ubuntu 18.10
Ubuntu 18.04 LTS
Ubuntu 16.04 LTS

Summary

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

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 LTS: hostapd – 2:2.6-15ubuntu2.3; wpasupplicant – 2:2.6-15ubuntu2.3
Ubuntu 16.04 LTS: hostapd – 2.4-0ubuntu6.5; wpasupplicant – 2.4-0ubuntu6.5

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

CVE-2019-11555

Source: USN-3969-1: wpa_supplicant and hostapd vulnerability

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