1. Ubuntu Security Notices
  2. USN-3255-1

USN-3255-1: LightDM vulnerability

Publication date

4 April 2017

Overview

LightDM could be made to run programs as an administrator.

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.

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.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
16.10 yakkety lightdm –  1.19.5-0ubuntu1.1
16.04 xenial lightdm –  1.18.3-0ubuntu1.1

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References

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