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CVE-2021-32743

Passwords used to access external services inadvertently exposed through API

8.8 HighFix available

Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. In versions prior to 2.11.10 and from version 2.12.0 through version 2.12.4, some of the Icinga 2 features that require credentials for external services expose those credentials through the API to authenticated API users with read permissions for the corresponding object types. IdoMysqlConnection and IdoPgsqlConnection (every released version) exposes the password of the user used to connect to the database. IcingaDB (added in 2.12.0) exposes the password used to connect to the Redis server. ElasticsearchWriter (added in 2.8.0)exposes the password used to connect to the Elasticsearch server. An attacker who obtains these credentials can impersonate Icinga to these services and add, modify and delete information there. If credentials with more permissions are in use, this increases the impact accordingly. Starting with the 2.11.10 and 2.12.5 releases, these passwords are no longer exposed via the API. As a workaround, API user permissions can be restricted to not allow querying of any affected objects, either by explicitly listing only the required object types for object query permissions, or by applying a filter rule.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

1.80%Up 1.2 points since Jul 16, 2021
90%50%10%1%

What each source reports

CVE List Score used 8.8

Passwords used to access external services inadvertently exposed through API

Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. In versions prior to 2.11.10 and from version 2.12.0 through version 2.12.4, some of the Icinga 2 features that require credentials for external services expose those credentials through the API to authenticated API users with read permissions for the corresponding object types. IdoMysqlConnection and IdoPgsqlConnection (every released version) exposes the password of the user used to connect to the database. IcingaDB (added in 2.12.0) exposes the password used to connect to the Redis server. ElasticsearchWriter (added in 2.8.0)exposes the password used to connect to the Elasticsearch server. An attacker who obtains these credentials can impersonate Icinga to these services and add, modify and delete information there. If credentials with more permissions are in use, this increases the impact accordingly. Starting with the 2.11.10 and 2.12.5 releases, these passwords are no longer exposed via the API. As a workaround, API user permissions can be restricted to not allow querying of any affected objects, either by explicitly listing only the required object types for object query permissions, or by applying a filter rule.

Record
CVE-2021-32743
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-202
Updated
2026-11-02
EUVDEUVD-2021-19515 8.8

Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. In versions prior to 2.11.10 and from version 2.12.0 through version 2.12.4, some of the Icinga 2 features that require credentials for external services expose those credentials through the API to authenticated API users with read permissions for the corresponding object types. IdoMysqlConnection and IdoPgsqlConnection (every released version) exposes the password of the user used to connect to the database. IcingaDB (added in 2.12.0) exposes the password used to connect to the Redis server. ElasticsearchWriter (added in 2.8.0)exposes the password used to connect to the Elasticsearch server. An attacker who obtains these credentials can impersonate Icinga to these services and add, modify and delete information there. If credentials with more permissions are in use, this increases the impact accordingly. Starting with the 2.11.10 and 2.12.5 releases, these passwords are no longer exposed via the API. As a workaround, API user permissions can be restricted to not allow querying of any affected objects, either by explicitly listing only the required object types for object query permissions, or by applying a filter rule.

Record
EUVD-2021-19515
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
NVD 8.8

Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. In versions prior to 2.11.10 and from version 2.12.0 through version 2.12.4, some of the Icinga 2 features that require credentials for external services expose those credentials through the API to authenticated API users with read permissions for the corresponding object types. IdoMysqlConnection and IdoPgsqlConnection (every released version) exposes the password of the user used to connect to the database. IcingaDB (added in 2.12.0) exposes the password used to connect to the Redis server. ElasticsearchWriter (added in 2.8.0)exposes the password used to connect to the Elasticsearch server. An attacker who obtains these credentials can impersonate Icinga to these services and add, modify and delete information there. If credentials with more permissions are in use, this increases the impact accordingly. Starting with the 2.11.10 and 2.12.5 releases, these passwords are no longer exposed via the API. As a workaround, API user permissions can be restricted to not allow querying of any affected objects, either by explicitly listing only the required object types for object query permissions, or by applying a filter rule.

Record
CVE-2021-32743
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
6.5 MediumAV:N/AC:L/Au:S/C:P/I:P/A:P
Weakness
CWE-202
Updated
2026-11-02
OSV 8.8

Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. In versions prior to 2.11.10 and from version 2.12.0 through version 2.12.4, some of the Icinga 2 features that require credentials for external services expose those credentials through the API to authenticated API users with read permissions for the corresponding object types. IdoMysqlConnection and IdoPgsqlConnection (every released version) exposes the password of the user used to connect to the database. IcingaDB (added in 2.12.0) exposes the password used to connect to the Redis server. ElasticsearchWriter (added in 2.8.0)exposes the password used to connect to the Elasticsearch server. An attacker who obtains these credentials can impersonate Icinga to these services and add, modify and delete information there. If credentials with more permissions are in use, this increases the impact accordingly. Starting with the 2.11.10 and 2.12.5 releases, these passwords are no longer exposed via the API. As a workaround, API user permissions can be restricted to not allow querying of any affected objects, either by explicitly listing only the required object types for object query permissions, or by applying a filter rule.

Record
CVE-2021-32743
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2021-32743 8.8

Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. In versions prior to 2.11.10 and from version 2.12.0 through version 2.12.4, some of the Icinga 2 features that require credentials for external services expose those credentials through the API to authenticated API users with read permissions for the corresponding object types. IdoMysqlConnection and IdoPgsqlConnection (every released version) exposes the password of the user used to connect to the database. IcingaDB (added in 2.12.0) exposes the password used to connect to the Redis server. ElasticsearchWriter (added in 2.8.0)exposes the password used to connect to the Elasticsearch server. An attacker who obtains these credentials can impersonate Icinga to these services and add, modify and delete information there. If credentials with more permissions are in use, this increases the impact accordingly. Starting with the 2.11.10 and 2.12.5 releases, these passwords are no longer exposed via the API. As a workaround, API user permissions can be restricted to not allow querying of any affected objects, either by explicitly listing only the required object types for object query permissions, or by applying a filter rule.

Record
DEBIAN-CVE-2021-32743
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2021-32743 8.8

Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. In versions prior to 2.11.10 and from version 2.12.0 through version 2.12.4, some of the Icinga 2 features that require credentials for external services expose those credentials through the API to authenticated API users with read permissions for the corresponding object types. IdoMysqlConnection and IdoPgsqlConnection (every released version) exposes the password of the user used to connect to the database. IcingaDB (added in 2.12.0) exposes the password used to connect to the Redis server. ElasticsearchWriter (added in 2.8.0)exposes the password used to connect to the Elasticsearch server. An attacker who obtains these credentials can impersonate Icinga to these services and add, modify and delete information there. If credentials with more permissions are in use, this increases the impact accordingly. Starting with the 2.11.10 and 2.12.5 releases, these passwords are no longer exposed via the API. As a workaround, API user permissions can be restricted to not allow querying of any affected objects, either by explicitly listing only the required object types for object query permissions, or by applying a filter rule.

Record
UBUNTU-CVE-2021-32743
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2021:1089-1 No score

Security update for icinga2

This update for icinga2 fixes the following issues:

icinga2 was updated to 2.12.5:

Version 2.12.5 fixes two security vulnerabilities that may lead to privilege escalation for authenticated API users. Other improvements include several bugfixes related to downtimes, downtime notifications, and more reliable connection handling.

  • Security

    • Don't expose the PKI ticket salt via the API. This may lead to privilege escalation for authenticated API users by them being able to request certificates for other identities (CVE-2021-32739)

    • Don't expose IdoMysqlConnection, IdoPgsqlConnection, and ElasticsearchWriter passwords via the API (CVE-2021-32743)

    Depending on your setup, manual intervention beyond installing the new versions may be required, so please read the more detailed information in the release blog post carefully.

  • Bugfixes

    • Don't send downtime end notification if downtime hasn't started #8878
    • Don't let a failed downtime creation block the others #8871
    • Support downtimes and comments for checkables with long names #8870
    • Trigger fixed downtimes immediately if the current time matches (instead of waiting for the timer) #8891
    • Add configurable timeout for full connection handshake #8872
  • Enhancements

    • Replace existing downtimes on ScheduledDowntime change #8880
    • Improve crashlog #8869
Record
openSUSE-SU-2021:1089-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:10856-1 No score

icinga2-2.13.1-1.3 on GA media

These are all security issues fixed in the icinga2-2.13.1-1.3 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10856-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
icinga2
Debian:12
before 2.12.5-1
2.12.5-1
icinga2
Debian:13
before 2.12.5-1
2.12.5-1
icinga2
Debian:14
before 2.12.5-1
2.12.5-1
icinga2
Debian:9
From an advisory covering 3 CVEs
before 2.6.0-2+deb9u2, plus listed versions
2.6.0-22.6.0-2+deb9u1
2.6.0-2+deb9u2
icinga2
Debian:11
From an advisory covering 4 CVEs
before 2.12.3-1+deb11u1, plus listed versions
2.12.3-1
2.12.3-1+deb11u1
icinga2
Ubuntu: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
icinga2
Ubuntu:18.04:LTS
All versions, plus listed versions
2.7.0-12.8.1-0ubuntu2
None known
icinga2
Ubuntu: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
icinga2
Ubuntu: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
icinga2
Ubuntu: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
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Affected packages
PackageAffectedFixed
icinga2
Ubuntu:25.10
All versions, plus listed versions
2.14.5-12.14.6-12.15.0-1
None known
icinga2
Ubuntu: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
icinga2
Ubuntu:26.04:LTS
All versions, plus listed versions
2.15.0-12.15.1-1
None known
icinga2
SUSE:Package Hub 15 SP1
From an advisory covering 3 CVEs
before 2.12.5-bp153.2.5.1
2.12.5-bp153.2.5.1
icinga2
SUSE:Package Hub 15 SP2
From an advisory covering 3 CVEs
before 2.12.5-bp153.2.5.1
2.12.5-bp153.2.5.1
icinga2
SUSE:Package Hub 15 SP3
From an advisory covering 3 CVEs
before 2.12.5-bp153.2.5.1
2.12.5-bp153.2.5.1
icinga2
openSUSE:Leap 15.2
From an advisory covering 3 CVEs
before 2.12.5-bp153.2.5.1
2.12.5-bp153.2.5.1
icinga2
openSUSE:Leap 15.3
From an advisory covering 3 CVEs
before 2.12.5-bp153.2.5.1
2.12.5-bp153.2.5.1
icinga2
openSUSE:Tumbleweed
From an advisory covering 7 CVEs
before 2.13.1-1.3
2.13.1-1.3

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-32743 is a high vulnerability (CVSS 8.8) in Icinga, published July 15, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.80%, the 78th percentile. Fixed in icinga2 2.12.5-1.

References

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