CVE-2021-27099

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

05/03/2021

Last modified:

16/03/2021

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

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 6.80 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): None

Base Score 3.x

6.80

Severity 3.x

MEDIUM

Vector 2.0

AV:N/AC:M/Au:S/C:P/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 4.90 MEDIUM
Vector: AV:N/AC:M/Au:S/C:P/I:P/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Medium
Authentication (Au): Single
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): None

Base Score 2.0

4.90

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:cncf:spire::::::::		0.8.5 (excluding)
cpe:2.3:a:cncf:spire::::::::	0.9.0 (including)	0.9.4 (excluding)
cpe:2.3:a:cncf:spire::::::::	0.10.0 (including)	0.10.2 (excluding)
cpe:2.3:a:cncf:spire::::::::	0.11.0 (including)	0.11.3 (excluding)
cpe:2.3:a:cncf:spire::::::::	0.12.0 (including)	0.12.1 (excluding)

To consult the complete list of CPE names with products and versions, see this page

References to Advisories, Solutions, and Tools

https://github.com/spiffe/spire/security/advisories/GHSA-q7gm-mjrg-44h9