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: Embargoed1955392
TreeView+ depends on / blocked
 
Reported: 2021-04-30 03:29 UTC by Mark Cooper
Modified: 2021-05-20 19:32 UTC (History)
4 users (show)

Fixed In Version: istio/istio 1.9.5, istio/istio 1.8.6
Doc Type: If docs needed, set a value
Doc Text:
An authorization bypass vulnerability was found in istio. When the istio gateway is configured with TLS mode `AUTO_PASSTHROUGH`, it is possible for a malicious user to bypass the authorization checks and gain access to protected services. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Clone Of:
Environment:
Last Closed: 2021-05-20 14:57:22 UTC

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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