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CVE-2021-32739 Detail

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.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

CNA: GitHub, Inc.

Base Score: 8.8 HIGH

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: 6.5 MEDIUM

Vector: (AV:N/AC:L/Au:S/C:P/I:P/A:P)

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://github.com/Icinga/icinga2/security/advisories/GHSA-98wp-jc6q-x5q5	Exploit Third Party Advisory
https://icinga.com/blog/2021/07/02/releasing-icinga-2-12-5-2-11-10/	Broken Link Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/11/msg00010.html	Mailing List Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-269	Improper Privilege Management	NIST
CWE-267	Privilege Defined With Unsafe Actions	GitHub, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

4 change records found show changes

Initial Analysis by NIST 8/03/2021 12:45:51 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR cpe:2.3:a:icinga:icinga::::::::* versions from (including) 2.4.0 up to (excluding) 2.11.10 cpe:2.3:a:icinga:icinga::::::::* versions from (including) 2.12.0 up to (excluding) 2.12.5
Added	CVSS V2		NIST (AV:N/AC:L/Au:S/C:P/I:P/A:P)
Added	CVSS V3.1		NIST AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Added	CWE		NIST CWE-269
Changed	Reference Type	https://github.com/Icinga/icinga2/security/advisories/GHSA-98wp-jc6q-x5q5 No Types Assigned	https://github.com/Icinga/icinga2/security/advisories/GHSA-98wp-jc6q-x5q5 Exploit, Third Party Advisory
Changed	Reference Type	https://icinga.com/blog/2021/07/02/releasing-icinga-2-12-5-2-11-10/ No Types Assigned	https://icinga.com/blog/2021/07/02/releasing-icinga-2-12-5-2-11-10/ Broken Link, Vendor Advisory

Quick Info

CVE Dictionary Entry:
CVE-2021-32739
NVD Published Date:
07/15/2021
NVD Last Modified:
12/02/2021
Source:
GitHub, Inc.

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Information Technology Laboratory

National Vulnerability Database