ubuntu-cve-2021-32739
Vulnerability from osv_ubuntu
Published
2021-07-15 15:15
Modified
2026-05-20 14:53
Summary
Details
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
8.8 (High)
8.8 (High)
N/A (UNKNOWN)
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "icinga2",
"binary_version": "2.4.1-2ubuntu1"
},
{
"binary_name": "icinga2-bin",
"binary_version": "2.4.1-2ubuntu1"
},
{
"binary_name": "icinga2-classicui",
"binary_version": "2.4.1-2ubuntu1"
},
{
"binary_name": "icinga2-common",
"binary_version": "2.4.1-2ubuntu1"
},
{
"binary_name": "icinga2-ido-mysql",
"binary_version": "2.4.1-2ubuntu1"
},
{
"binary_name": "icinga2-ido-pgsql",
"binary_version": "2.4.1-2ubuntu1"
},
{
"binary_name": "icinga2-studio",
"binary_version": "2.4.1-2ubuntu1"
},
{
"binary_name": "libicinga2",
"binary_version": "2.4.1-2ubuntu1"
},
{
"binary_name": "vim-icinga2",
"binary_version": "2.4.1-2ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "icinga2",
"purl": "pkg:deb/ubuntu/icinga2@2.4.1-2ubuntu1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"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"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "icinga2",
"binary_version": "2.8.1-0ubuntu2"
},
{
"binary_name": "icinga2-bin",
"binary_version": "2.8.1-0ubuntu2"
},
{
"binary_name": "icinga2-classicui",
"binary_version": "2.8.1-0ubuntu2"
},
{
"binary_name": "icinga2-common",
"binary_version": "2.8.1-0ubuntu2"
},
{
"binary_name": "icinga2-ido-mysql",
"binary_version": "2.8.1-0ubuntu2"
},
{
"binary_name": "icinga2-ido-pgsql",
"binary_version": "2.8.1-0ubuntu2"
},
{
"binary_name": "icinga2-studio",
"binary_version": "2.8.1-0ubuntu2"
},
{
"binary_name": "libicinga2",
"binary_version": "2.8.1-0ubuntu2"
},
{
"binary_name": "vim-icinga2",
"binary_version": "2.8.1-0ubuntu2"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "icinga2",
"purl": "pkg:deb/ubuntu/icinga2@2.8.1-0ubuntu2?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.7.0-1",
"2.8.1-0ubuntu2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "icinga2",
"binary_version": "2.11.2-1ubuntu3"
},
{
"binary_name": "icinga2-bin",
"binary_version": "2.11.2-1ubuntu3"
},
{
"binary_name": "icinga2-common",
"binary_version": "2.11.2-1ubuntu3"
},
{
"binary_name": "icinga2-ido-mysql",
"binary_version": "2.11.2-1ubuntu3"
},
{
"binary_name": "icinga2-ido-pgsql",
"binary_version": "2.11.2-1ubuntu3"
},
{
"binary_name": "vim-icinga2",
"binary_version": "2.11.2-1ubuntu3"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "icinga2",
"purl": "pkg:deb/ubuntu/icinga2@2.11.2-1ubuntu3?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.10.5-1build1",
"2.11.2-1",
"2.11.2-1ubuntu1",
"2.11.2-1ubuntu2",
"2.11.2-1ubuntu3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "icinga2",
"binary_version": "2.13.2-1build2"
},
{
"binary_name": "icinga2-bin",
"binary_version": "2.13.2-1build2"
},
{
"binary_name": "icinga2-common",
"binary_version": "2.13.2-1build2"
},
{
"binary_name": "icinga2-ido-mysql",
"binary_version": "2.13.2-1build2"
},
{
"binary_name": "icinga2-ido-pgsql",
"binary_version": "2.13.2-1build2"
},
{
"binary_name": "vim-icinga2",
"binary_version": "2.13.2-1build2"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "icinga2",
"purl": "pkg:deb/ubuntu/icinga2@2.13.2-1build2?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.12.3-1",
"2.13.1-1",
"2.13.2-1",
"2.13.2-1build1",
"2.13.2-1build2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "icinga2",
"binary_version": "2.14.2-1build2"
},
{
"binary_name": "icinga2-bin",
"binary_version": "2.14.2-1build2"
},
{
"binary_name": "icinga2-common",
"binary_version": "2.14.2-1build2"
},
{
"binary_name": "icinga2-ido-mysql",
"binary_version": "2.14.2-1build2"
},
{
"binary_name": "icinga2-ido-pgsql",
"binary_version": "2.14.2-1build2"
},
{
"binary_name": "vim-icinga2",
"binary_version": "2.14.2-1build2"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "icinga2",
"purl": "pkg:deb/ubuntu/icinga2@2.14.2-1build2?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.13.8-1",
"2.14.1-1",
"2.14.2-1",
"2.14.2-1build1",
"2.14.2-1build2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "icinga2",
"binary_version": "2.15.0-1"
},
{
"binary_name": "icinga2-bin",
"binary_version": "2.15.0-1"
},
{
"binary_name": "icinga2-common",
"binary_version": "2.15.0-1"
},
{
"binary_name": "icinga2-ido-mysql",
"binary_version": "2.15.0-1"
},
{
"binary_name": "icinga2-ido-pgsql",
"binary_version": "2.15.0-1"
},
{
"binary_name": "vim-icinga2",
"binary_version": "2.15.0-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "icinga2",
"purl": "pkg:deb/ubuntu/icinga2@2.15.0-1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.14.5-1",
"2.14.6-1",
"2.15.0-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "icinga2",
"binary_version": "2.15.1-1"
},
{
"binary_name": "icinga2-bin",
"binary_version": "2.15.1-1"
},
{
"binary_name": "icinga2-common",
"binary_version": "2.15.1-1"
},
{
"binary_name": "icinga2-ido-mysql",
"binary_version": "2.15.1-1"
},
{
"binary_name": "icinga2-ido-pgsql",
"binary_version": "2.15.1-1"
},
{
"binary_name": "vim-icinga2",
"binary_version": "2.15.1-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "icinga2",
"purl": "pkg:deb/ubuntu/icinga2@2.15.1-1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.15.0-1",
"2.15.1-1"
]
}
],
"aliases": [],
"details": "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\u0027s 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\u0027s 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\u0027s 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.",
"id": "UBUNTU-CVE-2021-32739",
"modified": "2026-05-20T14:53:21Z",
"published": "2021-07-15T15:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-32739"
},
{
"type": "REPORT",
"url": "https://icinga.com/blog/2021/07/15/releasing-icinga-2-12-5-and-2-11-10/"
},
{
"type": "REPORT",
"url": "https://github.com/Icinga/icinga2/security/advisories/GHSA-98wp-jc6q-x5q5"
},
{
"type": "REPORT",
"url": "https://icinga.com/blog/2021/07/02/releasing-icinga-2-12-5-2-11-10/"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-32739"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2021-32739"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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