Ubuntu 20.10 USN-4734-1 Critical: Wpa_Supplicant Heap Overflow Threat

ubuntu

February 11, 2021

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 did not properly handle P2P

(Wi-Fi Direct) group information in some situations, leading to a

heap overflow. A physically proximate attacker could use this to cause a

denial of service or possibly execute arbitrary code. (CVE-2021-0326)

It was discovered that hostapd did not properly handle UPnP subscribe

messages in some circumstances. An attacker could use this to cause a

denial of service. (CVE-2020-12695)

Topics Covered

security advisory denial of service Ubuntu heap overflow ubuntu wpa_supplicant hostapd

Update Instructions

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

Ubuntu 20.10:
  hostapd                         2:2.9-1ubuntu8.1
  wpasupplicant                   2:2.9-1ubuntu8.1

Ubuntu 20.04 LTS:
  hostapd                         2:2.9-1ubuntu4.2
  wpasupplicant                   2:2.9-1ubuntu4.2

Ubuntu 18.04 LTS:
  hostapd                         2:2.6-15ubuntu2.7
  wpasupplicant                   2:2.6-15ubuntu2.7

Ubuntu 16.04 LTS:
  hostapd                         1:2.4-0ubuntu6.7
  wpasupplicant                   2.4-0ubuntu6.7

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