Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | unity | 7.2.2+14.04.20140714-0ubuntu1.1 | — |
References
- ubuntu-unity-screenlock-sec-bypass(95199) vdb-entry
- USN-2303-1 vendor-advisory
- 68987 vdb-entry
- 109788 vdb-entry
- https://bugs.launchpad.net/unity/7.2/+bug/1349128