CVE-2021-3636 — Improper Certificate Validation in Redhat Openshift

CWE-295 — Improper Certificate ValidationCWE-287 — Improper Authentication5 documents5 sources
Severity
4.6MEDIUMNVD
EPSS
0.0%
top 91.24%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Redhat Openshift
Timeline
PublishedJul 30
Latest updateMay 24

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 …

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:NExploitability: 2.1 | Impact: 2.5

Affected Packages2 packages

▶NVDredhat/openshift< 4.8
▶CVEListV5redhat/openshiftopenshift 4.8

Patches

Patch: bugzilla.redhat.com ↗Patch: bugzilla.redhat.com ↗

🔴Vulnerability Details

2
GHSA
GHSA-6fcp-x27g-fqqw: It was found in OpenShift, before version 4↗2022-05-24
▶
CVEList
CVE-2021-3636: It was found in OpenShift, before version 4↗2021-07-30
▶

📋Vendor Advisories

2
Red Hat
openshift: Injected service-ca.crt incorrectly contains additional internal CAs↗2021-07-14
▶
Microsoft
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↗2021-07-13
▶
CVE-2021-3636 — Improper Certificate Validation | cvebase