What is CVE-2021-27098?

CVE-2021-27098 is a high-severity vulnerability in Cncf Spire, classified under Improper Certificate Validation. CVSS score: 8.1/10. Published 2021-03-05.

How severe is CVE-2021-27098?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Cncf Spire

CVE-2021-27098

In SPIRE 0.8.1 through 0.8.4 and before versions 0.9.4, 0.10.2, 0.11.3 and 0.12.1, specially crafted requests to the FetchX509SVID RPC of SPIRE Server’s Legacy Node API can result in the possible issuance of an X.509 certificate with a URI SAN for a SPIFFE ID that the agent is not authorized to distribute. Proper controls are in place to require that the caller presents a valid agent certificate that is already authorized to issue at least one SPIFFE ID, and the requested SPIFFE ID belongs to the same trust domain, prior to being able to trigger this vulnerability. This issue has been fixed in SPIRE versions 0.8.5, 0.9.4, 0.10.2, 0.11.3 and 0.12.1.

Vulnerability class: Improper Certificate Validation

EPSS: 0.006 (43.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

Affected products

Cncf Spire
N/a — versions n/a

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-27098?: CVE-2021-27098 is a high-severity vulnerability in Cncf Spire, classified under Improper Certificate Validation. CVSS score: 8.1/10. Published 2021-03-05.
How severe is CVE-2021-27098?: High severity. CVSS v3 base score is 8.1 out of 10.