Vulnerability Name:

CVE-2018-6536 (CCN-138604)

Assigned:2018-01-17
Published:2018-01-17
Updated:2019-10-03
Summary: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.
CVSS v3 Severity:5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
4.9 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
8.4 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
7.4 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:4.9 Medium (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
7.2 High (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-732
Vulnerability Consequences:Gain Privileges
References:Source: MITRE
Type: CNA
CVE-2018-6536

Source: XF
Type: UNKNOWN
icinga-cve20186536-priv-esc(138604)

Source: CCN
Type: Icinga GIT Repository
Partial privilege escalation via PID file manipulation #5991

Source: MISC
Type: Issue Tracking, Third Party Advisory
https://github.com/Icinga/icinga2/issues/5991

Vulnerable Configuration:Configuration 1:
  • cpe:/a:icinga:icinga:*:*:*:*:*:*:*:* (Version >= 2.0.0 and <= 2.8.1)

    • Configuration CCN 1:
  • cpe:/a:icinga:icinga:2.8.1:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.disco:def:201865360000000
    V
    		CVE-2018-6536 on Ubuntu 19.04 (disco) - untriaged.
    2018-02-02
    oval:com.ubuntu.artful:def:20186536000
    V
    		CVE-2018-6536 on Ubuntu 17.10 (artful) - untriaged.
    2018-02-02
    oval:com.ubuntu.cosmic:def:201865360000000
    V
    		CVE-2018-6536 on Ubuntu 18.10 (cosmic) - untriaged.
    2018-02-02
    oval:com.ubuntu.bionic:def:20186536000
    V
    		CVE-2018-6536 on Ubuntu 18.04 LTS (bionic) - untriaged.
    2018-02-02
    oval:com.ubuntu.bionic:def:201865360000000
    V
    		CVE-2018-6536 on Ubuntu 18.04 LTS (bionic) - untriaged.
    2018-02-02
    oval:com.ubuntu.cosmic:def:20186536000
    V
    		CVE-2018-6536 on Ubuntu 18.10 (cosmic) - untriaged.
    2018-02-02
    oval:com.ubuntu.xenial:def:201865360000000
    V
    		CVE-2018-6536 on Ubuntu 16.04 LTS (xenial) - untriaged.
    2018-02-02
    oval:com.ubuntu.xenial:def:20186536000
    V
    		CVE-2018-6536 on Ubuntu 16.04 LTS (xenial) - untriaged.
    2018-02-02
    BACK
    icinga icinga *
    icinga icinga 2.8.1