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Icinga 2.8.0 < 2.11.8, 2.12.2 < 2.12.3 CRL Vulnerability

Information

Severity

Severity

Medium

Family

Family

General

CVSSv2 Base

CVSSv2 Base

6.4

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:N

Solution Type

Solution Type

Vendor Patch

Created

Created

3 years ago

Modified

Modified

3 years ago

Summary

Icinga 2 is prone to a vulnerability where revoked certificates are automatically renewed ignoring the CRL.

Insight

Insight

Revoked certificates due for renewal will automatically be renewed ignoring the CRL. When a CRL is specified in the ApiListener configuration, Icinga 2 only used it when connections were established so far, but not when a certificate is requested. This allows a node to automatically renew a revoked certificate if it meets the other conditions for auto renewal (issued before 2017 or expires in less than 30 days). Because Icinga 2 currently uses a validity duration of 15 years, this only affects setups with external certificate signing and revoked certificates that expire in less then 30 days.

Affected Software

Affected Software

Icinga versions 2.8.0 - 2.11.7 and 2.12.2.

Detection Method

Detection Method

Checks if a vulnerable version is present on the target host.

Solution

Solution

Update to version 2.11.8, 2.12.3 or later.

Common Vulnerabilities and Exposures (CVE)