CVE-2021-32739: Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. From…

PriorityP354high8.8CVSS 3.1

AVNACLPRLUINSUCHIHAH

EPSS

1.14%

62.6th percentile

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.

Affected

9 ranges

Vendor	Product	Version range	Fixed in
debian	debian_linux	—	—
debian	icinga2	< icinga2 2.12.5-1 (bookworm)	icinga2 2.12.5-1 (bookworm)
icinga	icinga	>= 2.12.0 < 2.12.5	2.12.5
icinga	icinga	>= 2.4.0 < 2.11.10	2.11.10
icinga	icinga2	—	—
icinga	icinga2	>= 0 < 2.12.3-1+deb11u1	2.12.3-1+deb11u1
icinga	icinga2	>= 0 < 2.12.5-1	2.12.5-1
icinga	icinga2	>= 0 < 2.12.5-1	2.12.5-1
icinga	icinga2	>= 0 < 2.12.5-1	2.12.5-1

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvdv2.06.5MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:P

osv8.8HIGH

vendor_debian8.8HIGH

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