Bug 1955396 (CVE-2021-31921) - CVE-2021-31921 istio/istio: authorization bypass when using AUTO_PASSTHROUGH
Summary: CVE-2021-31921 istio/istio: authorization bypass when using AUTO_PASSTHROUGH
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2021-31921
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 1955392
TreeView+ depends on / blocked
 
Reported: 2021-04-30 03:29 UTC by Mark Cooper
Modified: 2023-09-01 00:00 UTC (History)
6 users (show)

Fixed In Version: istio/istio 1.9.5, istio/istio 1.8.6
Clone Of:
Environment:
Last Closed: 2021-05-20 14:57:22 UTC
Embargoed:

Attachments (Terms of Use)

Description Mark Cooper 2021-04-30 03:29:04 UTC 
A unauthorized access vulnerability was found in istio/istio in all versions thru 1.9. When the Istio Gateway is configured with TLS mode `AUTO_PASSTHROUGH`, it is possible for a user to bypass the authorization checks access protected services. 

[1] https://istio.io/latest/docs/reference/config/networking/gateway/
Comment 1 Mark Cooper 2021-04-30 03:29:06 UTC 
Acknowledgments:

Name: the Istio Product Security Working Group
Comment 6 Mark Cooper 2021-05-12 01:23:57 UTC 
External References:

https://istio.io/latest/news/security/istio-security-2021-006/
Comment 8 errata-xmlrpc 2021-05-20 11:11:49 UTC 
This issue has been addressed in the following products:

  OpenShift Service Mesh 2.0

Via RHSA-2021:2061 https://access.redhat.com/errata/RHSA-2021:2061
Comment 9 Product Security DevOps Team 2021-05-20 14:57:22 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-2021-31921
Comment 10 errata-xmlrpc 2021-05-20 19:32:25 UTC 
This issue has been addressed in the following products:

  OpenShift Service Mesh 1.1

Via RHSA-2021:2085 https://access.redhat.com/errata/RHSA-2021:2085
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