Bug 1793652

Summary:	Support for AWS IMDS v2 (available in cloud-init 19.4)
Product:	Red Hat Enterprise Linux 7	Reporter:	Marc Methot <mmethot>
Component:	cloud-init	Assignee:	Eduardo Otubo <eterrell>
Status:	CLOSED ERRATA	QA Contact:	Frank Liang <xiliang>
Severity:	urgent	Docs Contact:	Jiri Herrmann <jherrman>
Priority:	urgent
Version:	7.8	CC:	agilley, davdunc, eterrell, gveitmic, huzhao, jgreguske, jherrman, linl, mkalinin, ribarry, wefleury, xiliang, ymao
Target Milestone:	rc	Keywords:	TestOnly, ZStream
Target Release:	7.9
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Enhancement
Doc Text:	.cloud-init now supports IMDSv2 for AWS With this update, the `cloud-init` utility supports Instance Metadata Service version 2 (IMDSv2) for Amazon Web Services (AWS). As a result, RHEL virtual machines on AWS created by `cloud-init` can benefit from various identity management and security enhancement provided by IMDSv2.	Story Points:	---
Clone Of:
Clones:	1827098 1827207 (view as bug list)		Environment:
Last Closed:	2020-09-29 19:48:41 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1827098, 1827207

Description Marc Methot 2020-01-21 18:34:35 UTC

The version of cloud-init included with RHEL is older than 19.4 and as such it does not allow the use of session authentication.

Limited impact as AWS still supports IMDS v1, however customer requests' it.


Version-Release number of selected component (if applicable): 18.5

More info:
- https://github.com/canonical/cloud-init/commit/4bc399e0cd0b7e9177f948aecd49f6b8323ff30b
- https://github.com/canonical/cloud-init/blob/master/ChangeLog
- https://aws.amazon.com/blogs/security/defense-in-depth-open-firewalls-reverse-proxies-ssrf-vulnerabilities-ec2-instance-metadata-service/

Comment 12 Eduardo Otubo 2020-04-14 12:41:43 UTC

*** Bug 1810704 has been marked as a duplicate of this bug. ***

Comment 20 errata-xmlrpc 2020-09-29 19:48:41 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Moderate: cloud-init security, bug fix, and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2020:3898