CVE-2024-32475 – Envoy RELEASE_ASSERT using auto_sni with :authority header > 255 bytes

https://notcve.org/view.php?id=CVE-2024-32475

Envoy is a cloud-native, open source edge and service proxy. When an upstream TLS cluster is used with `auto_sni` enabled, a request containing a `host`/`:authority` header longer than 255 characters triggers an abnormal termination of Envoy process. Envoy does not gracefully handle an error when setting SNI for outbound TLS connection. The error can occur when Envoy attempts to use the `host`/`:authority` header value longer than 255 characters as SNI for outbound TLS connection. SNI length is limited to 255 characters per the standard. • https://github.com/envoyproxy/envoy/commit/b47fc6648d7c2dfe0093a601d44cb704b7bad382 https://github.com/envoyproxy/envoy/security/advisories/GHSA-3mh5-6q8v-25wj https://access.redhat.com/security/cve/CVE-2024-32475 https://bugzilla.redhat.com/show_bug.cgi?id=2276149 • CWE-253: Incorrect Check of Function Return Value CWE-617: Reachable Assertion •