CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
78.4%
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.
github.com/Icinga/icinga2/security/advisories/GHSA-98wp-jc6q-x5q5
icinga.com/blog/2021/07/02/releasing-icinga-2-12-5-2-11-10/
icinga.com/blog/2021/07/15/releasing-icinga-2-12-5-and-2-11-10/
launchpad.net/bugs/cve/CVE-2021-32739
nvd.nist.gov/vuln/detail/CVE-2021-32739
security-tracker.debian.org/tracker/CVE-2021-32739
www.cve.org/CVERecord?id=CVE-2021-32739
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
78.4%