CVE-2021-27099
First published: Fri Mar 05 2021(Updated: )
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
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cncf Spire | <0.8.5 | |
| Cncf Spire | >=0.9.0<0.9.4 | |
| Cncf Spire | >=0.10.0<0.10.2 | |
| Cncf Spire | >=0.11.0<0.11.3 | |
| Cncf Spire | >=0.12.0<0.12.1 |
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Frequently Asked Questions
What is CVE-2021-27099?
CVE-2021-27099 is a vulnerability in SPIRE where the aws_iid Node Attestor improperly normalizes the path provided through the agent ID templating feature, potentially allowing the issuance of an arbitrary SPIFFE ID within the same trust domain.
What is the severity of CVE-2021-27099?
CVE-2021-27099 has a severity rating of 6.8 (medium).
How does CVE-2021-27099 affect SPIRE?
CVE-2021-27099 affects SPIRE versions 0.8.5, 0.9.0-0.9.4, 0.10.0-0.10.2, 0.11.0-0.11.3, and 0.12.0-0.12.1.
How does the aws_iid Node Attestor vulnerability in SPIRE occur?
The vulnerability in the aws_iid Node Attestor in SPIRE occurs due to improper normalization of the path provided through the agent ID templating feature, which can be exploited by an attacker to issue an arbitrary SPIFFE ID within the same trust domain.
Is there a fix for CVE-2021-27099?
To fix CVE-2021-27099, it is recommended to upgrade SPIRE to version 0.8.5, 0.9.4, 0.10.2, 0.11.3, or 0.12.1.
- collector/nvd-index
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/remedy
- agent/last-modified-date
- agent/references
- agent/author
- agent/weakness
- agent/severity
- agent/description
- agent/tags
- agent/event
- agent/first-publish-date
- vendor/cncf
- canonical/cncf spire
- version/cncf spire/0.9.0
- version/cncf spire/0.10.0
- version/cncf spire/0.11.0
- version/cncf spire/0.12.0