Privilege Escalation via Icinga2.pid File Manipulation

CVE-2018-6536 · MEDIUM Severity

AV:L/AC:L/AU:N/C:N/I:N/A:C

An issue was discovered in Icinga 2.x through 2.8.1. The daemon creates an icinga2.pid file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for icinga2.pid modification before a root script executes a "kill `cat /pathname/icinga2.pid`" command, as demonstrated by icinga2.init.d.cmake.

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