CVE-2021-3636

Public Exploit

Description

It was found in OpenShift, before version 4.8, that the generated certificate for the in-cluster Service CA, incorrectly included additional certificates. The Service CA is automatically mounted into all pods, allowing them to safely connect to trusted in-cluster services that present certificates signed by the trusted Service CA. The incorrect inclusion of additional CAs in this certificate would allow an attacker that compromises any of the additional CAs to masquerade as a trusted in-cluster service.

Categories

4.6
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.04%
Third-Party Advisory redhat.com
Affected: n/a openshift
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1978621 issue tracking patch exploit third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-3636?
CVE-2021-3636 has been scored as a medium severity vulnerability.
How to fix CVE-2021-3636?
To fix CVE-2021-3636, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-3636 being actively exploited in the wild?
It is possible that CVE-2021-3636 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3636?
CVE-2021-3636 affects n/a openshift.
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