# [HIGH] Find and fix HTTP/2 rapid reset zero-day vulnerability CVE-2023-44487

**Source:** Snyk
**Published:** 2023-10-11
**Article:** https://snyk.io/blog/find-fix-http-2-rapid-reset-zero-day-vulnerability-cve-2023-44487/

## Threat Profile

Snyk Blog In this article
Written by Jamie Smith 
Kriti Dogra 
Anthony Larkin 
October 11, 2023
0 mins read Researchers and vendors have conducted an investigation into volumetric DDoS attacks in the wild between August – October 2023 that has resulted in the discovery of a novel “rapid reset” technique that leverages stream multiplexing, a feature of the widely-adopted HTTP/2 protocol. 
Disclosed today, the HTTP/2 rapid reset vulnerability is being tracked as CVE-2023-44487 and has been designa…

## Indicators of Compromise (high-fidelity only)

- **CVE:** `CVE-2023-44487`

## MITRE ATT&CK Techniques

- **T1190** — Exploit Public-Facing Application

## Kill chain phases observed

_(none detected from narrative keywords)_

## Recommended hunts

### IOC-driven hunts (use shared templates)

These are standard IOC-substitution hunts — the canonical SPL and KQL live once in [`_TEMPLATES.md`](../_TEMPLATES.md), so we don't repeat the same boilerplate on every CVE / hash / network-IOC briefing.

- **Asset exposure — vulnerability matches article CVE(s)** ([template](../_TEMPLATES.md#asset-exposure)) — phase: **recon**, confidence: **High**
  - CVE(s): `CVE-2023-44487`


## Why this matters

Severity classified as **HIGH** based on: CVE present, 1 use case(s) fired, 1 technique(s) inferred. Read the full article for actor attribution, tooling details, and any defanged IOCs in the body that aren't visible in the RSS summary.