Ubuntu Security Notice 883-1 – It was discovered that NetworkManager did not ensure that the Certification Authority (CA) certificate file remained present when using WPA Enterprise or 802.1x networks. A remote attacker could use this flaw to spoof the identity of a wireless network and view sensitive information. It was discovered that the connection editor GUI would incorrectly export objects over D-Bus. A local user could read D-Bus signals to view other users’ network connection passwords and pre-shared keys.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/85075/USN-883-1.txt
Source: https://packetstormsecurity.com/files/85075/Ubuntu-Security-Notice-883-1.html