USN-3255-1: LightDM vulnerability

4 April 2017

LightDM could be made to run programs as an administrator.

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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.

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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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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

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Further reading