Bug 2217985 (CVE-2023-35944) - CVE-2023-35944 envoy: Incorrect handling of HTTP requests and responses with mixed case schemes
Summary: CVE-2023-35944 envoy: Incorrect handling of HTTP requests and responses with ...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2023-35944
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Nobody
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 2217969
TreeView+ depends on / blocked
 
Reported: 2023-06-27 18:43 UTC by Guilherme de Almeida Suckevicz
Modified: 2023-09-14 17:35 UTC (History)
4 users (show)

Fixed In Version: envoy 1.26.3, envoy 1.25.8, envoy 1.24.9, envoy 1.23.11
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in Envoy that allows for mixed-case schemes in HTTP/2. However, some internal scheme checks in Envoy are case-sensitive, leading to incorrect handling of requests and responses with mixed case schemes. For example, if a request with a mixed scheme HTTP is sent to the OAuth2 filter, it will fail the exact-match checks for HTTP and inform the remote endpoint the scheme is HTTP, thus potentially bypassing OAuth2 checks specific to HTTP requests.
Clone Of:
Environment:
Last Closed: 2023-08-11 21:35:45 UTC
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2023:4624 0 None None None 2023-08-11 16:48:19 UTC
Red Hat Product Errata RHSA-2023:4625 0 None None None 2023-08-11 16:49:03 UTC
Red Hat Product Errata RHSA-2023:5175 0 None None None 2023-09-14 17:35:41 UTC

Description Guilherme de Almeida Suckevicz 2023-06-27 18:43:42 UTC 
Envoy allows mixed-case schemes in HTTP/2, however, some internal scheme checks in Envoy are case-sensitive, leading to incorrect handling of requests and responses with mixed case schemes. For example, if a request with mixed scheme http is sent to the OAuth2 filter, it will fail the exact-match checks for http, and inform the remote endpoint the scheme is https, thus potentially bypassing OAuth2 checks specific to HTTP requests.
Comment 4 errata-xmlrpc 2023-08-11 16:48:18 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Service Mesh 2.3 for RHEL 8

Via RHSA-2023:4624 https://access.redhat.com/errata/RHSA-2023:4624
Comment 5 errata-xmlrpc 2023-08-11 16:49:02 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Service Mesh 2.4 for RHEL 8

Via RHSA-2023:4625 https://access.redhat.com/errata/RHSA-2023:4625
Comment 6 Product Security DevOps Team 2023-08-11 21:35:44 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-2023-35944
Comment 7 errata-xmlrpc 2023-09-14 17:35:40 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Service Mesh 2.2 for RHEL 8

Via RHSA-2023:5175 https://access.redhat.com/errata/RHSA-2023:5175
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