{"id":"UBUNTU-CVE-2018-6536","details":"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.","modified":"2026-01-20T17:01:38.311066Z","published":"2018-02-02T09:29:00Z","upstream":["CVE-2018-6536"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-6536"},{"type":"REPORT","url":"https://github.com/Icinga/icinga2/issues/5991"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-6536"}],"affected":[{"package":{"name":"icinga2","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/icinga2@2.4.1-2ubuntu1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.8-1build1","2.3.11-1","2.4.0-1","2.4.1-1","2.4.1-2","2.4.1-2ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"icinga2","binary_version":"2.4.1-2ubuntu1"},{"binary_name":"icinga2-bin","binary_version":"2.4.1-2ubuntu1"},{"binary_name":"icinga2-classicui","binary_version":"2.4.1-2ubuntu1"},{"binary_name":"icinga2-common","binary_version":"2.4.1-2ubuntu1"},{"binary_name":"icinga2-ido-mysql","binary_version":"2.4.1-2ubuntu1"},{"binary_name":"icinga2-ido-pgsql","binary_version":"2.4.1-2ubuntu1"},{"binary_name":"icinga2-studio","binary_version":"2.4.1-2ubuntu1"},{"binary_name":"libicinga2","binary_version":"2.4.1-2ubuntu1"},{"binary_name":"vim-icinga2","binary_version":"2.4.1-2ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-6536.json"}},{"package":{"name":"icinga2","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/icinga2@2.8.1-0ubuntu2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.7.0-1","2.8.1-0ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"icinga2","binary_version":"2.8.1-0ubuntu2"},{"binary_name":"icinga2-bin","binary_version":"2.8.1-0ubuntu2"},{"binary_name":"icinga2-classicui","binary_version":"2.8.1-0ubuntu2"},{"binary_name":"icinga2-common","binary_version":"2.8.1-0ubuntu2"},{"binary_name":"icinga2-ido-mysql","binary_version":"2.8.1-0ubuntu2"},{"binary_name":"icinga2-ido-pgsql","binary_version":"2.8.1-0ubuntu2"},{"binary_name":"icinga2-studio","binary_version":"2.8.1-0ubuntu2"},{"binary_name":"libicinga2","binary_version":"2.8.1-0ubuntu2"},{"binary_name":"vim-icinga2","binary_version":"2.8.1-0ubuntu2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-6536.json"}},{"package":{"name":"icinga2","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/icinga2@2.11.2-1ubuntu3?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.10.5-1build1","2.11.2-1","2.11.2-1ubuntu1","2.11.2-1ubuntu2","2.11.2-1ubuntu3"],"ecosystem_specific":{"binaries":[{"binary_name":"icinga2","binary_version":"2.11.2-1ubuntu3"},{"binary_name":"icinga2-bin","binary_version":"2.11.2-1ubuntu3"},{"binary_name":"icinga2-common","binary_version":"2.11.2-1ubuntu3"},{"binary_name":"icinga2-ido-mysql","binary_version":"2.11.2-1ubuntu3"},{"binary_name":"icinga2-ido-pgsql","binary_version":"2.11.2-1ubuntu3"},{"binary_name":"vim-icinga2","binary_version":"2.11.2-1ubuntu3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-6536.json"}},{"package":{"name":"icinga2","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/icinga2@2.13.2-1build2?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.12.3-1","2.13.1-1","2.13.2-1","2.13.2-1build1","2.13.2-1build2"],"ecosystem_specific":{"binaries":[{"binary_name":"icinga2","binary_version":"2.13.2-1build2"},{"binary_name":"icinga2-bin","binary_version":"2.13.2-1build2"},{"binary_name":"icinga2-common","binary_version":"2.13.2-1build2"},{"binary_name":"icinga2-ido-mysql","binary_version":"2.13.2-1build2"},{"binary_name":"icinga2-ido-pgsql","binary_version":"2.13.2-1build2"},{"binary_name":"vim-icinga2","binary_version":"2.13.2-1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-6536.json"}},{"package":{"name":"icinga2","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/icinga2@2.14.2-1build2?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.13.8-1","2.14.1-1","2.14.2-1","2.14.2-1build1","2.14.2-1build2"],"ecosystem_specific":{"binaries":[{"binary_name":"icinga2","binary_version":"2.14.2-1build2"},{"binary_name":"icinga2-bin","binary_version":"2.14.2-1build2"},{"binary_name":"icinga2-common","binary_version":"2.14.2-1build2"},{"binary_name":"icinga2-ido-mysql","binary_version":"2.14.2-1build2"},{"binary_name":"icinga2-ido-pgsql","binary_version":"2.14.2-1build2"},{"binary_name":"vim-icinga2","binary_version":"2.14.2-1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-6536.json"}},{"package":{"name":"icinga2","e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