Envoy Proxy Improper Certificate Validation Vulnerability - CVE-2022-21656 - Vulnerability Database

Envoy Proxy Improper Certificate Validation Vulnerability - CVE-2022-21656

Medium

Reference: CVE-2022-21656

NVD Link: https://nvd.nist.gov/vuln/detail/CVE-2022-21656

Title: Envoy Proxy Improper Certificate Validation Vulnerability

Overview:

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 quottype confusionquot 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.