USN-3802-1: X.Org X server vulnerability

26 October 2018

X.Org X server could be made to overwrite files as the administrator.

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Releases

Packages

Details

Narendra Shinde discovered that the X.Org X server incorrectly handled
certain command line parameters when running as root with the legacy
wrapper. When certain graphics drivers are being used, a local attacker
could possibly use this issue to overwrite arbitrary files and escalate
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 18.10
Ubuntu 18.04
Ubuntu 16.04

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

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Further reading