PT-2021-17248 · Spire · Spire

C53Robin · Published 2021-03-05 · Updated 2021-03-16 · CVE-2021-27099

Positive Technologies (AI Summary)

CVSS v3.1

6.8

Medium

Base vector

AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions: SPIRE versions prior to 0.8.5 SPIRE versions prior to 0.9.4 SPIRE versions prior to 0.10.2 SPIRE versions prior to 0.11.3 SPIRE versions prior to 0.12.1

Description: The issue arises from the improper normalization of the path provided through the agent ID templating feature by the "aws iid" Node Attestor. This 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.

Recommendations: For SPIRE versions prior to 0.8.5, update to version 0.8.5 or later. For SPIRE versions prior to 0.9.4, update to version 0.9.4 or later. For SPIRE versions prior to 0.10.2, update to version 0.10.2 or later. For SPIRE versions prior to 0.11.3, update to version 0.11.3 or later. For SPIRE versions prior to 0.12.1, update to version 0.12.1 or later.

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2021-27099

GHSA-Q7GM-MJRG-44H9

Affected Products

Spire

References · 5

• https://github.com/spiffe/spire/security/advisories/GHSA-q7gm-mjrg-44h9 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-27099 · Security Note
• https://osv.dev/vulnerability/CVE-2021-27099 · Vendor Advisory
• https://t.me/cvenotify/10953 · Telegram Post
• https://t.me/cibsecurity/24530 · Telegram Post