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Date: Mon, 11 Jul 2022 16:42:12 +0000
From: "Hausler, Micah" <>
To: "" <>
Subject: [kubernetes] CVE-2022-2385: aws-iam-authenticator AccessKeyID
 validation bypass

Hello Kubernetes Community,


A security issue was discovered in aws-iam-authenticator where an allow-listed IAM identity may be able to modify their username and escalate privileges. 

This issue has been rated high (, and assigned CVE-2022-2385
Am I vulnerable?
Users are only affected if they use the AccessKeyID template parameter to construct a username and provide different levels of access based on the username.
Affected Versions
v0.5.2 - v0.5.8
How do I mitigate this vulnerability?
Upgrading to v0.5.9 mitigates this vulnerability.

Prior to upgrading, this vulnerability can be mitigated by not using the {{AccessKeyID}} template value to construct usernames.
Fixed Versions
aws-iam-authenticator v0.5.9
This issue affected the logged identity, and is not discernible from valid requests.
Additional Details
See the GitHub issue for more details:
This vulnerability was reported by Gafnit Amiga from Lightspin



Micah Hausler

Principal Engineer

Amazon Web Services


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