cve/2023/CVE-2023-35945.md

### [CVE-2023-35945](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-35945)
![](https://img.shields.io/static/v1?label=Product&message=envoy&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20%3E%3D%201.26.0%2C%20%3C%201.26.3%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-400%3A%20Uncontrolled%20Resource%20Consumption&color=brighgreen)

### Description

Envoy is a cloud-native high-performance edge/middle/service proxy. Envoy’s HTTP/2 codec may leak a header map and bookkeeping structures upon receiving `RST_STREAM` immediately followed by the `GOAWAY` frames from an upstream server. In nghttp2, cleanup of pending requests due to receipt of the `GOAWAY` frame skips de-allocation of the bookkeeping structure and pending compressed header. The error return [code path] is taken if connection is already marked for not sending more requests due to `GOAWAY` frame. The clean-up code is right after the return statement, causing memory leak. Denial of service through memory exhaustion. This vulnerability was patched in versions(s) 1.26.3, 1.25.8, 1.24.9, 1.23.11.

### POC

#### Reference
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-jfxv-29pc-x22r

#### Github
- https://github.com/fkie-cad/nvd-json-data-feeds
- https://github.com/zhaohuabing/cve-agent