Description
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.
Remediation
References
Related Vulnerabilities
WordPress Plugin Social Login by BestWebSoft Cross-Site Scripting (0.1)
WordPress Use of Insufficiently Random Values Vulnerability (CVE-2017-17091)
SharePoint Deserialization of Untrusted Data Vulnerability (CVE-2021-24066)
phpMyAdmin Other Vulnerability (CVE-2009-4605)
WordPress Plugin Advanced Order Export For WooCommerce Cross-Site Scripting (3.1.3)