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USN-3748-1: base-files vulnerability

21 August 2018

base-files could be made to hang or overwrite files as the administrator.



  • base-files - Debian base system miscellaneous files


Sander Bos discovered that the MOTD update script incorrectly handled
temporary files. A local attacker could use this issue to cause a denial of
service, or possibly escalate privileges if kernel symlink restrictions
were disabled.

Update instructions

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

Ubuntu 18.04

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