USN-4077-1: tmpreaper vulnerability

USN-4077-1: tmpreaper vulnerability

tmpreaper vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS

Summary

tmpreaper could be made to overwrite files as the administrator.

Software Description

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

Details

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 LTS
tmpreaper1.6.13+nmu1+deb9u1build0.18.04.1
Ubuntu 16.04 LTS
tmpreaper1.6.13+nmu1+deb9u1build0.16.04.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

Source: USN-4077-1: tmpreaper vulnerability

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