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USN-3255-1: LightDM vulnerability

4 April 2017

LightDM could be made to run programs as an administrator.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Releases

Packages

Details

It was discovered that LightDM incorrectly handled home directory creation for
guest users. A local attacker could use this issue to gain ownership of
arbitrary directory paths and possibly gain administrative privileges.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 16.10
Ubuntu 16.04

In general, a standard system update will make all the necessary changes.

References