Vulnerability Details : CVE-2021-27099
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
Products affected by CVE-2021-27099
- cpe:2.3:a:cncf:spire:*:*:*:*:*:*:*:*
- cpe:2.3:a:cncf:spire:*:*:*:*:*:*:*:*
- cpe:2.3:a:cncf:spire:*:*:*:*:*:*:*:*
- cpe:2.3:a:cncf:spire:*:*:*:*:*:*:*:*
- cpe:2.3:a:cncf:spire:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-27099
0.07%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 27 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-27099
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:N/AC:M/Au:S/C:P/I:P/A:N |
6.8
|
4.9
|
NIST | |
|
6.8
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N |
1.6
|
5.2
|
NIST |
CWE ids for CVE-2021-27099
-
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-27099
-
https://github.com/spiffe/spire/security/advisories/GHSA-q7gm-mjrg-44h9
Path Normalization issue in "aws_iid" Node Attestor · Advisory · spiffe/spire · GitHubPatch;Third Party Advisory
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