{"id":"CVE-2021-32739","aliases":["DEBIAN-CVE-2021-32739","DLA-2816-1","DLA-3953-1","EUVD-2021-19513","GHSA-98wp-jc6q-x5q5","UBUNTU-CVE-2021-32739","openSUSE-SU-2021:1089-1","openSUSE-SU-2024:10856-1"],"status":"published","title":"Results of queries for ApiListener objects include the ticket salt which allows in turn to steal (more privileged) identities","description":"Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. From version 2.4.0 through version 2.12.4, a vulnerability exists that may allow privilege escalation for authenticated API users. With a read-ony user's credentials, an attacker can view most attributes of all config objects including `ticket_salt` of `ApiListener`. This salt is enough to compute a ticket for every possible common name (CN). A ticket, the master node's certificate, and a self-signed certificate are enough to successfully request the desired certificate from Icinga. That certificate may in turn be used to steal an endpoint or API user's identity. Versions 2.12.5 and 2.11.10 both contain a fix the vulnerability. As a workaround, one may either specify queryable types explicitly or filter out ApiListener objects.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.0114,"percentile":0.67074,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-267","CWE-269"],"published":"2021-07-15T14:55:11Z","modified":"2026-10-24T10:50:24Z","fixes":[{"ecosystem":"Debian:12","package":"icinga2","fixed_in":["2.12.5-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"icinga2","fixed_in":["2.12.5-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"icinga2","fixed_in":["2.12.5-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12.5-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12.5-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12.5-1"}]}]},{"source":"osv","ecosystem":"Debian:9","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.0-2+deb9u2"}]}],"versions":["2.6.0-2","2.6.0-2+deb9u1"],"bundled":3},{"source":"osv","ecosystem":"Debian:11","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12.3-1+deb11u1"}]}],"versions":["2.12.3-1"],"bundled":4},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.8-1build1","2.3.11-1","2.4.0-1","2.4.1-1","2.4.1-2","2.4.1-2ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.7.0-1","2.8.1-0ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.10.5-1build1","2.11.2-1","2.11.2-1ubuntu1","2.11.2-1ubuntu2","2.11.2-1ubuntu3"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.12.3-1","2.13.1-1","2.13.2-1","2.13.2-1build1","2.13.2-1build2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.13.8-1","2.14.1-1","2.14.2-1","2.14.2-1build1","2.14.2-1build2"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.14.5-1","2.14.6-1","2.15.0-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.15.1-1","2.16.1-1","2.16.3-1","2.16.4-1build1","2.16.5-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.15.0-1","2.15.1-1"]},{"source":"osv","ecosystem":"SUSE:Package Hub 15 SP1","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12.5-bp153.2.5.1"}]}],"bundled":3},{"source":"osv","ecosystem":"SUSE:Package Hub 15 SP2","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12.5-bp153.2.5.1"}]}],"bundled":3},{"source":"osv","ecosystem":"SUSE:Package Hub 15 SP3","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12.5-bp153.2.5.1"}]}],"bundled":3},{"source":"osv","ecosystem":"openSUSE:Leap 15.2","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12.5-bp153.2.5.1"}]}],"bundled":3},{"source":"osv","ecosystem":"openSUSE:Leap 15.3","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12.5-bp153.2.5.1"}]}],"bundled":3},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"icinga2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.13.1-1.3"}]}],"bundled":7}],"products":[{"vendor":"debian","product":"debian_linux"},{"vendor":"icinga","product":"icinga"},{"vendor":"icinga","product":"icinga2"}],"references":[{"url":"https://github.com/Icinga/icinga2/security/advisories/GHSA-98wp-jc6q-x5q5","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Third Party Advisory","evidence","report"]},{"url":"https://icinga.com/blog/2021/07/02/releasing-icinga-2-12-5-2-11-10/","tags":["x_refsource_MISC","x_transferred","Broken Link","Vendor Advisory","advisory","report"]},{"url":"https://lists.debian.org/debian-lts-announce/2021/11/msg00010.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2024/11/msg00010.html","tags":["web"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-32739","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-32739","tags":["report"]},{"url":"https://icinga.com/blog/2021/07/15/releasing-icinga-2-12-5-and-2-11-10/","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-32739","tags":["report"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/AG46DROWC4ZEVBNIZC5IYVVFYH4FMFCS/","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2020-29663","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-32739","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-32743","tags":["web"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2017-16933","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-6534","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-14004","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-37698","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2021-32739","title":"Results of queries for ApiListener objects include the ticket salt which allows in turn to steal (more privileged) identities","description":"Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. From version 2.4.0 through version 2.12.4, a vulnerability exists that may allow privilege escalation for authenticated API users. With a read-ony user's credentials, an attacker can view most attributes of all config objects including `ticket_salt` of `ApiListener`. This salt is enough to compute a ticket for every possible common name (CN). A ticket, the master node's certificate, and a self-signed certificate are enough to successfully request the desired certificate from Icinga. That certificate may in turn be used to steal an endpoint or API user's identity. Versions 2.12.5 and 2.11.10 both contain a fix the vulnerability. As a workaround, one may either specify queryable types explicitly or filter out ApiListener objects.","status":"published","published":"2021-07-15T14:55:11Z","modified":"2025-11-03T21:44:44.603Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-267"],"updated_at":"2026-11-02T14:33:07.349244Z"}],"euvd":[{"id":"EUVD-2021-19513","description":"Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. From version 2.4.0 through version 2.12.4, a vulnerability exists that may allow privilege escalation for authenticated API users. With a read-ony user's credentials, an attacker can view most attributes of all config objects including `ticket_salt` of `ApiListener`. This salt is enough to compute a ticket for every possible common name (CN). A ticket, the master node's certificate, and a self-signed certificate are enough to successfully request the desired certificate from Icinga. That certificate may in turn be used to steal an endpoint or API user's identity. Versions 2.12.5 and 2.11.10 both contain a fix the vulnerability. As a workaround, one may either specify queryable types explicitly or filter out ApiListener objects.","status":"published","published":"2021-07-15T14:55:11Z","modified":"2025-11-03T21:44:44Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T19:49:31.7352Z"}],"nvd":[{"id":"CVE-2021-32739","description":"Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. From version 2.4.0 through version 2.12.4, a vulnerability exists that may allow privilege escalation for authenticated API users. With a read-ony user's credentials, an attacker can view most attributes of all config objects including `ticket_salt` of `ApiListener`. This salt is enough to compute a ticket for every possible common name (CN). A ticket, the master node's certificate, and a self-signed certificate are enough to successfully request the desired certificate from Icinga. That certificate may in turn be used to steal an endpoint or API user's identity. Versions 2.12.5 and 2.11.10 both contain a fix the vulnerability. As a workaround, one may either specify queryable types explicitly or filter out ApiListener objects.","status":"published","published":"2021-07-15T15:15:08.567Z","modified":"2026-06-17T03:53:32.047Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-267","CWE-269"],"updated_at":"2026-11-02T14:06:55.747384Z"}],"osv":[{"id":"CVE-2021-32739","description":"Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. From version 2.4.0 through version 2.12.4, a vulnerability exists that may allow privilege escalation for authenticated API users. With a read-ony user's credentials, an attacker can view most attributes of all config objects including `ticket_salt` of `ApiListener`. This salt is enough to compute a ticket for every possible common name (CN). A ticket, the master node's certificate, and a self-signed certificate are enough to successfully request the desired certificate from Icinga. That certificate may in turn be used to steal an endpoint or API user's identity. Versions 2.12.5 and 2.11.10 both contain a fix the vulnerability. As a workaround, one may either specify queryable types explicitly or filter out ApiListener objects.","status":"published","published":"2021-07-15T15:15:08.567Z","modified":"2026-10-24T10:50:24.430823049Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:19.793849Z"},{"id":"DEBIAN-CVE-2021-32739","description":"Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. From version 2.4.0 through version 2.12.4, a vulnerability exists that may allow privilege escalation for authenticated API users. With a read-ony user's credentials, an attacker can view most attributes of all config objects including `ticket_salt` of `ApiListener`. This salt is enough to compute a ticket for every possible common name (CN). A ticket, the master node's certificate, and a self-signed certificate are enough to successfully request the desired certificate from Icinga. That certificate may in turn be used to steal an endpoint or API user's identity. Versions 2.12.5 and 2.11.10 both contain a fix the vulnerability. As a workaround, one may either specify queryable types explicitly or filter out ApiListener objects.","status":"published","published":"2021-07-15T15:15:08.567Z","modified":"2026-10-23T18:03:14.834263135Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:35.233346Z"},{"id":"UBUNTU-CVE-2021-32739","description":"Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. From version 2.4.0 through version 2.12.4, a vulnerability exists that may allow privilege escalation for authenticated API users. With a read-ony user's credentials, an attacker can view most attributes of all config objects including `ticket_salt` of `ApiListener`. This salt is enough to compute a ticket for every possible common name (CN). A ticket, the master node's certificate, and a self-signed certificate are enough to successfully request the desired certificate from Icinga. That certificate may in turn be used to steal an endpoint or API user's identity. Versions 2.12.5 and 2.11.10 both contain a fix the vulnerability. As a workaround, one may either specify queryable types explicitly or filter out ApiListener objects.","status":"published","published":"2021-07-15T15:15:00Z","modified":"2026-10-17T12:55:46.65082148Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:27.332852Z"},{"id":"DLA-2816-1","title":"icinga2 - security update","status":"published","published":"2021-11-10T00:00:00Z","modified":"2026-03-09T01:18:24.54256Z","updated_at":"2026-11-02T15:46:11.189256Z"},{"id":"DLA-3953-1","title":"icinga2 - security update","status":"published","published":"2024-11-16T00:00:00Z","modified":"2026-03-09T01:23:14.428478Z","updated_at":"2026-11-02T15:46:12.203458Z"},{"id":"openSUSE-SU-2021:1089-1","title":"Security update for icinga2","description":"This update for icinga2 fixes the following issues:\n\nicinga2 was updated to 2.12.5:\n\n  Version 2.12.5 fixes two security vulnerabilities that may lead\n  to privilege escalation for authenticated API users.\n  Other improvements include several bugfixes related to downtimes,\n  downtime notifications, and more reliable connection handling.\n\n  * Security\n\n    - Don't expose the PKI ticket salt via the API. This may lead\n      to privilege escalation for authenticated API users by them\n      being able to request certificates for other identities\n      (CVE-2021-32739)\n\n    - Don't expose IdoMysqlConnection, IdoPgsqlConnection, and\n      ElasticsearchWriter passwords via the API\n      (CVE-2021-32743)\n\n    Depending on your setup, manual intervention beyond installing\n    the new versions may be required, so please read the more\n    detailed information in the release blog post carefully.\n\n  * Bugfixes\n\n    - Don't send downtime end notification if downtime hasn't\n      started #8878\n    - Don't let a failed downtime creation block the others #8871\n    - Support downtimes and comments for checkables with long names\n      #8870\n    - Trigger fixed downtimes immediately if the current time\n      matches (instead of waiting for the timer) #8891\n    - Add configurable timeout for full connection handshake #8872\n  * Enhancements\n    - Replace existing downtimes on ScheduledDowntime change #8880\n    - Improve crashlog #8869\n","status":"published","published":"2021-07-24T18:06:03Z","modified":"2026-02-04T02:25:44.099337Z","updated_at":"2026-11-02T16:58:31.879684Z"},{"id":"openSUSE-SU-2024:10856-1","title":"icinga2-2.13.1-1.3 on GA media","description":"These are all security issues fixed in the icinga2-2.13.1-1.3 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T04:34:04.697166Z","updated_at":"2026-11-02T16:58:34.894275Z"}]}}