Ubuntu 18.10 Moderate: USN-3944-1 Fixes For WPA Supplicant And Hostapd

ubuntu

April 10, 2019

Several security issues were fixed in wpa_supplicant and hostapd.

Summary

Several security issues were fixed in wpa_supplicant and hostapd.

Software Description:

- wpa: client support for WPA and WPA2

Details:

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. (CVE-2019-9495)

Mathy Vanhoef discovered that wpa_supplicant and hostapd incorrectly

validated received scalar and element values in EAP-pwd-Commit messages. A

remote attacker could possibly use this issue to perform a reflection

attack and authenticate without the appropriate password. (CVE-2019-9497,

CVE-2019-9498, CVE-2019-9499)

It was discovered that hostapd incorrectly handled obtaining random

numbers. In rare cases where the urandom device isn't available, it would

fall back to using a low-quality PRNG. This issue only affected Ubuntu

14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-10743)

Topics Covered

security advisory moderate remote attack ubuntu wpa_supplicant hostapd

Update Instructions

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

Ubuntu 18.10:
  hostapd                         2:2.6-18ubuntu1.1
  wpasupplicant                   2:2.6-18ubuntu1.1

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

Ubuntu 16.04 LTS:
  hostapd                         2.4-0ubuntu6.4
  wpasupplicant                   2.4-0ubuntu6.4

Ubuntu 14.04 LTS:
  hostapd                         2.1-0ubuntu1.7
  wpasupplicant                   2.1-0ubuntu1.7

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