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Ubuntu Security Notice USN-4734-2

Ubuntu Security Notice USN-4734-2
Posted Feb 16, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4734-2 - USN-4734-1 fixed several vulnerabilities in wpa_supplicant. This update provides the corresponding update for Ubuntu 14.04 ESM. It was discovered that wpa_supplicant did not properly handle P2P 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. 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. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-12695, CVE-2021-0326
MD5 | f9aca742cf078ddc6d67314d0dee884c

Ubuntu Security Notice USN-4734-2

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-4734-2
February 16, 2021

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

- Ubuntu 14.04 ESM

Summary:

Several security issues were fixed in wpa_supplicant and hostapd.

Software Description:
- wpa: client support for WPA and WPA2

Details:

USN-4734-1 fixed several vulnerabilities in wpa_supplicant. This
update provides the corresponding update for Ubuntu 14.04 ESM.

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 14.04 ESM:
hostapd 1:2.1-0ubuntu1.7+esm3
wpasupplicant 2.1-0ubuntu1.7+esm3

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

References:
https://usn.ubuntu.com/4734-2
https://usn.ubuntu.com/4734-1
CVE-2020-12695, CVE-2021-0326
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