Icinga up to 2.8.1 Daemon /pathname/icinga2.pid` access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Icinga up to 2.8.1. The affected element is an unknown function of the file /pathname/icinga2.pid` of the component Daemon. Performing a manipulation results in access control. This vulnerability is reported as CVE-2018-6536. The attack requires a local approach. No exploit exists.

Detailsinfo

A vulnerability was found in Icinga up to 2.8.1. It has been classified as problematic. This affects an unknown code of the file /pathname/icinga2.pid` of the component Daemon. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on availability. The summary by CVE is:

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.

The bug was discovered 01/17/2018. The weakness was disclosed 02/02/2018 (Website). It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2018-6536 since 02/02/2018. Attacking locally is a requirement. A authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 16 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 254361 (Linux Distros Unpatched Vulnerability : CVE-2018-6536), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (254361). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.3
VulDB Temp Score: 3.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 254361
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2018-6536

OpenVAS ID: 865434
OpenVAS Name: Icinga2 < 2.8.2 Multiple Vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/17/2018 🔍
02/02/2018 +16 days 🔍
02/02/2018 +0 days 🔍
02/02/2018 +0 days 🔍
02/03/2018 +1 days 🔍
08/25/2025 +2760 days 🔍

Sourcesinfo

Advisory: 5991
Status: Not defined

CVE: CVE-2018-6536 (🔍)
GCVE (CVE): GCVE-0-2018-6536
GCVE (VulDB): GCVE-100-112767

Entryinfo

Created: 02/03/2018 08:57
Updated: 08/25/2025 15:43
Changes: 02/03/2018 08:57 (60), 01/01/2020 10:27 (1), 02/03/2023 14:16 (3), 08/25/2025 15:43 (17)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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