Unity before 7.2.3 and 7.3.x before 7.3.1, as used in Ubuntu, does not properly take focus of the keyboard when switching to the lock screen, which allows physically proximate attackers to bypass the lock screen by (1) leveraging a machine that had text selected when locking or (2) resuming from a suspension.
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
Link | Tags |
---|---|
https://exchange.xforce.ibmcloud.com/vulnerabilities/95199 | vdb entry |
http://www.ubuntu.com/usn/USN-2303-1 | vendor advisory |
http://www.securityfocus.com/bid/68987 | vdb entry |
http://www.osvdb.org/109788 | vdb entry |
https://bugs.launchpad.net/unity/7.2/+bug/1349128 |