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USN-4077-1: tmpreaper vulnerability

29 July 2019

tmpreaper could be made to overwrite files as the administrator.



  • tmpreaper - cleans up files in directories based on their age


It was discovered that tmpreaper incorrectly handled certain mount operations. A
local attacker could possibly use this issue to create arbitrary files, leading
to privilege escalation.

Update instructions

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

Ubuntu 18.04
Ubuntu 16.04

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