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.
{
"binaries": [
{
"binary_version": "1:2.1-0ubuntu1.7+esm2",
"binary_name": "hostapd"
},
{
"binary_version": "2.1-0ubuntu1.7+esm2",
"binary_name": "wpagui"
},
{
"binary_version": "2.1-0ubuntu1.7+esm2",
"binary_name": "wpasupplicant"
}
],
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}