6.8

CVE-2021-27099: cncf spire Incorrect Authorization

CVSS: 6.8v3.1MediumModified
Published 05-03-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-27099 is a medium (CVSS 6.8) Incorrect Authorization vulnerability in cncf spire. EPSS estimates a 0.72% chance of exploitation in the next 30 days, higher than 53.3% of scored vulnerabilities.

Overall risk
27/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.8/10
010
Medium · v3.1 (NVD)
EPSS score
0.72%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 05-03-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

In SPIRE before versions 0.8.5, 0.9.4, 0.10.2, 0.11.3 and 0.12.1, the "aws_iid" Node Attestor improperly normalizes the path provided through the agent ID templating feature, which may allow the issuance of an arbitrary SPIFFE ID within the same trust domain, if the attacker controls the value of an EC2 tag prior to attestation, and the attestor is configured for agent ID templating where the tag value is the last element in the path. This issue has been fixed in SPIRE versions 0.11.3 and 0.12.1

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

0.72%

Chance of exploitation in the next 30 days

Percentile

53%

Versus all other CVEs

30-day change

0.00 pp

From 0.72% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.72%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cncf1 product
  • spire< 0.8.5 | ≥ 0.9.0, < 0.9.4 | ≥ 0.10.0, < 0.10.2 | ≥ 0.11.0, < 0.11.3 | ≥ 0.12.0, < 0.12.1

1 vendor · 1 product

References

1 links