Ubuntu Security Notices
USN-4136-2

USN-4136-2: wpa_supplicant and hostapd vulnerability

Publication date

18 September 2019

Overview

wpa_supplicant could be made to be disconnected and require reconnection to the network if it received a specially crafted management frame.

Releases

14.04 LTS 12.04

Packages

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

Details

USN-4136-1 fixed a vulnerability in wpa_supplicant. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

It was discovered that wpa_supplicant incorrectly handled certain management
frames. An attacker could possibly use this issue to cause a denial of service.

USN-4136-1 fixed a vulnerability in wpa_supplicant. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

It was discovered that wpa_supplicant incorrectly handled certain management
frames. An attacker could possibly use this issue to cause a denial of service.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release	Package Version
14.04 trusty	hostapd – 1:2.1-0ubuntu1.7+esm2
14.04 trusty	wpasupplicant – 2.1-0ubuntu1.7+esm2
12.04 precise	wpasupplicant – 0.7.3-6ubuntu2.5

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References

CVE-2019-16275

CVE-2019-16275

USN-4136-1

USN-4136-1