Bug 1973478 (CVE-2021-34824)

Summary:	CVE-2021-34824 istio: istiod propagates user-specified TLS keys and certificates to the secure Istio gateways
Product:	[Other] Security Response	Reporter:	Anten Skrabec <askrabec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	jwendell, kconner, rcernich, security-response-team, twalsh
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	istio 1.9.6, istio 1.10.2	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in istio. Any client authorized to access Istio XDS API can retrieve any cached gateway TLS certificate and private keys. The highest threat from this vulnerability is to data confidentiality.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-06-29 22:40:31 UTC	Type:	---
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:	1973379

Description Anten Skrabec 2021-06-17 22:56:48 UTC

In Istio 1.8+ versions, Istiod propagates user-specified TLS keys and
certificates to the secure Istio gateways
<https://istio.io/latest/docs/tasks/traffic-management/ingress/secure-ingress/>
via Istiod. Normally, a gateway deployment is only able to access TLS
certificates and private keys stored in the secret it can access allowed by
the Kubernetes RBAC. However, a bug in Istiod causes that a client
authorized to access Istio XDS API can retrieve any gateway TLS certificate
and private keys cached in Istiod. This security vulnerability only impacts
Istio 1.8, 1.9 and 1.10 minor releases, among which, 1.9 and 1.10 are
within the Istio support window.

Comment 3 Product Security DevOps Team 2021-06-29 22:40:31 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-34824