CVE-2021-32739
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network with a low-privilege account. High risk of data exposure, data tampering, service disruption.
- Exploit odds
- 1.1% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 1.1% in the next 30 days (EPSS).
- Severity: 8.8 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 1.1% · EPSS, next 30 days
- Weakness
- CWE-267
- Record status
- Modified
Affected
- Icinga < 2.11.10
- Icinga < 2.12.5
- Debian Linux 9.0
Attack profile CVSS 3.1 · 8.8
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2021-32739.md and follow it. Check whether this project is affected by CVE-2021-32739. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/Icinga/icinga2/security/advisories/GHSA-98wp-jc6q-x5q5
- https://icinga.com/blog/2021/07/02/releasing-icinga-2-12-5-2-11-10/
- https://github.com/Icinga/icinga2/security/advisories/GHSA-98wp-jc6q-x5q5
- https://icinga.com/blog/2021/07/02/releasing-icinga-2-12-5-2-11-10/
References
- https://github.com/Icinga/icinga2/security/advisories/GHSA-98wp-jc6q-x5q5
- https://icinga.com/blog/2021/07/02/releasing-icinga-2-12-5-2-11-10/
- https://lists.debian.org/debian-lts-announce/2021/11/msg00010.html
- https://github.com/Icinga/icinga2/security/advisories/GHSA-98wp-jc6q-x5q5
- https://icinga.com/blog/2021/07/02/releasing-icinga-2-12-5-2-11-10/
- https://lists.debian.org/debian-lts-announce/2021/11/msg00010.html
- https://lists.debian.org/debian-lts-announce/2024/11/msg00010.html