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Bug 2142009

Summary:	Registrar may crash during EK validation when require_ek_cert is enabled
Product:	Red Hat Enterprise Linux 9	Reporter:	Sergio Correia <scorreia>
Component:	keylime	Assignee:	Sergio Correia <scorreia>
Status:	CLOSED ERRATA	QA Contact:	Patrik Koncity <pkoncity>
Severity:	unspecified	Docs Contact:	Jan Fiala <jafiala>
Priority:	high
Version:	9.1	CC:	afarley, ansasaki, dueno, jafiala, lvrabec, pkoncity
Target Milestone:	rc	Keywords:	Triaged, ZStream
Target Release:	---	Flags:	pm-rhel: mirror+
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	keylime-6.5.2-1.el9	Doc Type:	Bug Fix
Doc Text:	.TPM certificates no longer cause Keylime registrar to crash Previously, some certificates in the Keylime TPM certificate store were malformed x509 certificates and caused the Keylime registrar to crash. This update fixes the problem, and Keylime registrar no longer crashes due to malformed ceritficates.	Story Points:	---
Clone Of:
Clones:	2142033 (view as bug list)		Environment:
Last Closed:	2023-05-09 07:45:11 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:	2150830
Bug Blocks:	2142033

Description Sergio Correia 2022-11-11 12:00:22 UTC

Description of problem:

The option require_ek_cert tells the tenant whether to require an EK certificate from the TPM, and is recommended to be used in production deployments.

When keylime is doing the initial identity quote and require_ek_cert is enabled, it will attempt to verify that the TPM device on the agent is genuine, based on its EK certificate, which will be validated against the trusted certificates present in the keylime TPM certificate store.

However, a few of the certificates -- namely a few issued by Nuvoton -- in the TPM certificate store are malformed x509 certificates, which will then cause an issue as they are attempted to be parsed. 

It's possible that during the EK validation, one of those certificates are read, which then causes the issue described here.

Version-Release number of selected component (if applicable):
keylime <= 6.5.1


Additional info:
This issue was fixed upstream here: https://github.com/keylime/keylime/pull/1156

Comment 13 errata-xmlrpc 2023-05-09 07:45:11 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 (keylime 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/RHBA-2023:2307