Vulnerability Name:

CVE-2021-37698 (CCN-207852)

Assigned:2021-08-19
Published:2021-08-19
Updated:2021-12-03
Summary:Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. In versions 2.5.0 through 2.13.0, ElasticsearchWriter, GelfWriter, InfluxdbWriter and Influxdb2Writer do not verify the server's certificate despite a certificate authority being specified. Icinga 2 instances which connect to any of the mentioned time series databases (TSDBs) using TLS over a spoofable infrastructure should immediately upgrade to version 2.13.1, 2.12.6, or 2.11.11 to patch the issue. Such instances should also change the credentials (if any) used by the TSDB writer feature to authenticate against the TSDB. There are no workarounds aside from upgrading.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-295
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2021-37698

Source: XF
Type: UNKNOWN
icinga-cve202137698-mitm(207852)

Source: MISC
Type: Release Notes, Third Party Advisory
https://github.com/Icinga/icinga2/releases/tag/v2.11.11

Source: MISC
Type: Release Notes, Third Party Advisory
https://github.com/Icinga/icinga2/releases/tag/v2.12.6

Source: MISC
Type: Release Notes, Third Party Advisory
https://github.com/Icinga/icinga2/releases/tag/v2.13.1

Source: CCN
Type: Icinga GIT Repository
Missing TLS server certificate validation in ElasticsearchWriter, GelfWriter, InfluxdbWriter and Influxdb2Writer

Source: CONFIRM
Type: Third Party Advisory
https://github.com/Icinga/icinga2/security/advisories/GHSA-cxfm-8j5v-5qr2

Source: MLIST
Type: Mailing List, Third Party Advisory
[debian-lts-announce] 20211110 [SECURITY] [DLA 2816-1] icinga2 security update

Vulnerable Configuration:Configuration 1:
  • cpe:/a:icinga:icinga:*:*:*:*:*:*:*:* (Version >= 2.5.0 and < 2.11.10)
  • OR cpe:/a:icinga:icinga:*:*:*:*:*:*:*:* (Version >= 2.12.0 and < 2.12.6)
  • OR cpe:/a:icinga:icinga:*:*:*:*:*:*:*:* (Version >= 2.13.0 and < 2.13.1)

    • Configuration 2:
  • cpe:/o:debian:debian_linux:9.0:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:icinga:icinga:2.5.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:112427
    P
    		icinga2-2.13.1-1.3 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:105933
    P
    		icinga2-2.13.1-1.3 on GA media (Moderate)
    2021-10-01
    BACK
    icinga icinga *
    icinga icinga *
    icinga icinga *
    debian debian linux 9.0
    icinga icinga 2.5.0