CVE-2021-43824 – Null pointer dereference in envoy

https://notcve.org/view.php?id=CVE-2021-43824

Envoy is an open source edge and service proxy, designed for cloud-native applications. In affected versions a crafted request crashes Envoy when a CONNECT request is sent to JWT filter configured with regex match. This provides a denial of service attack vector. The only workaround is to not use regex in the JWT filter. Users are advised to upgrade. • https://github.com/envoyproxy/envoy/commit/9371333230b1a6e1be2eccf4868771e11af6253a https://github.com/envoyproxy/envoy/security/advisories/GHSA-vj5m-rch8-5r2p https://access.redhat.com/security/cve/CVE-2021-43824 https://bugzilla.redhat.com/show_bug.cgi?id=2050744 • CWE-476: NULL Pointer Dereference •