CVE-2018-6536
An issue was discovered in Icinga 2.x through 2.8.1. The daemon creates an icinga2.pid file after...
CVE-2018-6536 is a medium vulnerability (CVSS 5.5) in Icinga, published February 2, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.26%, the 17th percentile. Fixed in icinga2 2.8.4-1.
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2018-6536- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.9 Medium
AV:L/AC:L/Au:N/C:N/I:N/A:C - Weakness
- CWE-732
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2018-6536- Updated
- 2026-11-02
EUVDEUVD-2018-18288 No score
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.
- Record
EUVD-2018-18288- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-653v-x44f-wmwh
An issue was discovered in Icinga 2.x through 2.8.1. The daemon creates an icinga2.pid file after...
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.
- Record
GHSA-653v-x44f-wmwh- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-732
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2018-6536- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2018-6536
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.
- Record
DEBIAN-CVE-2018-6536- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2018-6536
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.
- Record
UBUNTU-CVE-2018-6536- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
icinga2Debian:12 |
before 2.8.4-1 | 2.8.4-1 |
icinga2Debian:13 |
before 2.8.4-1 | 2.8.4-1 |
icinga2Debian:14 |
before 2.8.4-1 | 2.8.4-1 |
icinga2Ubuntu:16.04:LTS |
All versions, plus listed versions 2.3.8-1build12.3.11-12.4.0-12.4.1-12.4.1-22.4.1-2ubuntu1 |
None known |
icinga2Ubuntu:18.04:LTS |
All versions, plus listed versions 2.7.0-12.8.1-0ubuntu2 |
None known |
icinga2Ubuntu:20.04:LTS |
All versions, plus listed versions 2.10.5-1build12.11.2-12.11.2-1ubuntu12.11.2-1ubuntu22.11.2-1ubuntu3 |
None known |
icinga2Ubuntu:22.04:LTS |
All versions, plus listed versions 2.12.3-12.13.1-12.13.2-12.13.2-1build12.13.2-1build2 |
None known |
icinga2Ubuntu:24.04:LTS |
All versions, plus listed versions 2.13.8-12.14.1-12.14.2-12.14.2-1build12.14.2-1build2 |
None known |
icinga2Ubuntu:25.10 |
All versions, plus listed versions 2.14.5-12.14.6-12.15.0-1 |
None known |
icinga2Ubuntu:26.10 |
All versions, plus listed versions 2.15.1-12.16.1-12.16.3-12.16.4-1build12.16.5-1 |
None known |
icinga2Ubuntu:26.04:LTS |
All versions, plus listed versions 2.15.0-12.15.1-1 |
None known |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |