Envoy is an open source edge and service proxy, designed for cloud-native applications. The default_validator.cc implementation used to implement the default certificate validation routines has a "type confusion" bug when processing subjectAltNames. This processing allows, for example, an rfc822Name or uniformResourceIndicator to be authenticated as a domain name. This confusion allows for the bypassing of nameConstraints, as processed by the underlying OpenSSL/BoringSSL implementation, exposing the possibility of impersonation of arbitrary servers. As a result Envoy will trust upstream certificates that should not be trusted.
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Wed, 23 Apr 2025 20:15:00 +0000
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2022-02-22T22:25:11.000Z
Updated: 2025-04-23T19:01:38.563Z
Reserved: 2021-11-16T00:00:00.000Z
Link: CVE-2022-21656

Updated: 2024-08-03T02:46:39.567Z

Status : Modified
Published: 2022-02-22T23:15:11.223
Modified: 2024-11-21T06:45:10.103
Link: CVE-2022-21656
