CVE-2024-27919

EIP tracks 1 public exploit for CVE-2024-27919. PoCs published by lockness-Ko.

AI-analyzed exploit summary This repository contains a functional Go-based proof-of-concept exploit for CVE-2024-27316, targeting HTTP/2 servers with a denial-of-service (DoS) attack via crafted headers and continuous frame flooding. The exploit leverages HPACK header compression to generate large headers and floods the target with CONTINUATION frames.

Envoy is a cloud-native, open-source edge and service proxy. In versions 1.29.0 and 1.29.1, theEnvoy HTTP/2 protocol stack is vulnerable to the flood of CONTINUATION frames. Envoy's HTTP/2 codec does not reset a request when header map limits have been exceeded. This allows an attacker to send an sequence of CONTINUATION frames without the END_HEADERS bit set causing unlimited memory consumption. This can lead to denial of service through memory exhaustion. Users should upgrade to versions 1.29.2 to mitigate the effects of the CONTINUATION flood. Note that this vulnerability is a regression in Envoy version 1.29.0 and 1.29.1 only. As a workaround, downgrade to version 1.28.1 or earlier or disable HTTP/2 protocol for downstream connections.