mirror of
https://github.com/0xMarcio/cve.git
synced 2026-06-03 04:38:03 +02:00
0xMarcio
1.2 KiB
1.2 KiB
CVE-2022-21656
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.
POC
Reference
No PoCs from references.