CVE-2024-30255

National Vulnerability Database Information

Descrizione: Envoy is a cloud-native, open source edge and service proxy. The HTTP/2 protocol stack in Envoy versions prior to 1.29.3, 1.28.2, 1.27.4, and 1.26.8 are vulnerable to CPU exhaustion due to flood of CONTINUATION frames. Envoy's HTTP/2 codec allows the client to send an unlimited number of CONTINUATION frames even after exceeding Envoy's header map limits. This allows an attacker to send a sequence of CONTINUATION frames without the END_HEADERS bit set causing CPU utilization, consuming approximately 1 core per 300Mbit/s of traffic and culminating in denial of service through CPU exhaustion. Users should upgrade to version 1.29.3, 1.28.2, 1.27.4, or 1.26.8 to mitigate the effects of the CONTINUATION flood. As a workaround, disable HTTP/2 protocol for downstream connections.

Base Score CVSS: 5.3 (v3.1)

Il **Base Score CVSS** è un punteggio da **0 a 10** che rappresenta la gravità intrinseca di una vulnerabilità. Un punteggio più alto indica una gravità maggiore.

Riferimenti NVD

• http://www.openwall.com/lists/oss-security/2024/04/03/16
• http://www.openwall.com/lists/oss-security/2024/04/05/3
• https://github.com/envoyproxy/envoy/security/advisories/GHSA-j654-3ccm-vfmm
• http://www.openwall.com/lists/oss-security/2024/04/03/16
• http://www.openwall.com/lists/oss-security/2024/04/05/3
• https://github.com/envoyproxy/envoy/security/advisories/GHSA-j654-3ccm-vfmm

Exploit PoC da GitHub

• lockness-Ko/CVE-2024-27316: Proof of concept (PoC) for CVE-2024-27316 (tested), CVE-2024-30255 (untested), CVE-2024-31309 (untested), CVE-2024-28182 (untested), CVE-2024-2653 (untested) and CVE-2024-27919 (untested)
• blackmagic2023/Envoy-CPU-Exhaustion-Vulnerability-PoC: CVE-2024-30255 This repository contains a proof-of-concept (PoC) Python script to demonstrate the CPU exhaustion vulnerability in Envoy caused by a flood of CONTINUATION frames.