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Fencer Vulns
high 8.8

CVE-2021-32743 json

Passwords used to access external services inadvertently exposed through API

published 2021-07-15 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-19515

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

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 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.

Patch / fix

  • icinga icinga 2.11.10, 2.12.5
  • icinga2 Debian 14, Debian 13, Debian 12 2.12.5-1

debian advisories DEBIAN-CVE-2021-32743

  • icinga2 openSUSE Tumbleweed 2.13.1-1.3
  • icinga2 Package Hub 15 SP3, Package Hub 15 SP2, Package Hub 15 SP1 +2 more 2.12.5-bp153.2.5.1

opensuse advisories openSUSE-SU-2024:10856-1openSUSE-SU-2021:1089-1

Exploit prediction

1.80% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/Icinga/icinga2/security/advisories/GHSA-wrpw-pmr8-qgj7 referenced PoC, tagged "exploit" by a source, unverified
  • icinga.com https://icinga.com/blog/2021/07/15/releasing-icinga-2-12-5-and-2-11-10/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P

Affected products

  • Icinga icinga2

Classification

Weakness
  • CWE-202 Exposure of Sensitive Information Through Data Queries

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.