Bug 1942280 (CVE-2021-29258)

Summary:	CVE-2021-29258 envoyproxy/envoy: crash with empty HTTP/2 metadata map
Product:	[Other] Security Response	Reporter:	Mark Cooper <mcooper>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	askrabec, jwendell, kconner, rcernich, security-response-team, twalsh
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	envoyproxy/envoy 1.17.2	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in envoyproxy. An attacker, able to craft an HTTP2 request that specifies an empty metadata map, can crash envoy resulting in a denial of service due to the null reference. The highest threat from this vulnerability is to system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-04-22 10:47:02 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:	1941991

Description Mark Cooper 2021-03-24 03:35:32 UTC

A null reference vulnerability was found in all versions of Envoy up to 1.17.2. If an attacker can craft a HTTP2 request that specifies an empty metadata map[1], then envoy will attempt to process this and crash, resulting in a denial of service.

[1] - https://github.com/envoyproxy/envoy/blob/main/source/docs/h2_metadata.md

Comment 1 Mark Cooper 2021-03-24 03:35:38 UTC

Acknowledgments:

Name: the Envoy security team

Comment 7 Mark Cooper 2021-04-16 03:00:50 UTC

External References:

https://istio.io/latest/news/security/istio-security-2021-003/
https://github.com/envoyproxy/envoy/blob/main/source/docs/h2_metadata.md

Comment 8 errata-xmlrpc 2021-04-22 08:58:45 UTC

This issue has been addressed in the following products:

  OpenShift Service Mesh 2.0

Via RHSA-2021:1324 https://access.redhat.com/errata/RHSA-2021:1324

Comment 9 errata-xmlrpc 2021-04-22 09:01:31 UTC

This issue has been addressed in the following products:

  OpenShift Service Mesh 1.1

Via RHSA-2021:1322 https://access.redhat.com/errata/RHSA-2021:1322

Comment 10 Product Security DevOps Team 2021-04-22 10:47:02 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-2021-29258