==========================================================================
Ubuntu Security Notice USN-4077-1
July 29, 2019
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:
tmpreaper 1.6.13+nmu1+deb9u1build0.18.04.1
Ubuntu 16.04 LTS:
tmpreaper 1.6.13+nmu1+deb9u1build0.16.04.1
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4077-1
CVE-2019-3461
Package Information:
https://launchpad.net/ubuntu/+source/tmpreaper/1.6.13+nmu1+deb9u1build0.18.04.1
https://launchpad.net/ubuntu/+source/tmpreaper/1.6.13+nmu1+deb9u1build0.16.04.1
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