USN-4734-1: wpa_supplicant and hostapd vulnerabilities
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Ubuntu Security Notice USN-4734-1
February 11, 2021
wpa vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
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)
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.
References:
https://usn.ubuntu.com/4734-1
CVE-2020-12695, CVE-2021-0326
Package Information:
https://launchpad.net/ubuntu/+source/wpa/2:2.9-1ubuntu8.1
https://launchpad.net/ubuntu/+source/wpa/2:2.9-1ubuntu4.2
https://launchpad.net/ubuntu/+source/wpa/2:2.6-15ubuntu2.7
https://launchpad.net/ubuntu/+source/wpa/2.4-0ubuntu6.7
A wpa_supplicant and hostapd security update has been released for Ubuntu Linux 16.04 LTS, 18.04 LTS, 20.04 LTS, and 20.10.
