# http-live-simulator denial of service via unhandled exception

Source: https://junglewise.ai/threats/http-live-simulator-denial-of-service-via-unhandled-exception-3dc2b470  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2020-09-03. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

Severity: info · Published 2020-09-03

http-live-simulator is a Node.js package used to simulate HTTP Live Streaming servers for testing. Versions prior to 1.0.8 crash when receiving a specially crafted HTTP request due to an unhandled exception, causing the entire server process to shut down and disrupting streaming service availability.

Technologies: [http-live-simulator (npm)](https://junglewise.ai/threats/technologies/http-live-simulator). Vendors: [npm](https://junglewise.ai/threats/vendors/npm).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Informational severity, published 3 September 2020.

**Which products and versions are affected?** http-live-simulator (npm) SEMVER:introduced=0,fixed=1.0.8.

**Is there a fix for This vulnerability?** Yes. http-live-simulator (npm): upgrade to 1.0.8 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is This vulnerability attacked?** It is attacked over the network, in a software library.

**Am I affected?** Check whether you run http-live-simulator (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- http-live-simulator (npm): upgrade to 1.0.8 or later

  ```sh
  npm install http-live-simulator@1.0.8
  ```


## Technical details

The vulnerability is an unhandled exception in http-live-simulator prior to version 1.0.8 that causes a denial of service. When an attacker sends a specific HTTP request to the server, the package fails to catch an exception, causing the Node.js process to crash and the server to shut down. This is a network-accessible denial of service attack that requires no authentication or user interaction. The fix is available in version 1.0.8 and later.

## Affected products

- http-live-simulator http-live-simulator prior to 1.0.8

## Timeline

- 2020-09-03: disclosed
- 2020-09-03: patched: Version 1.0.8 released with fix

## References

- [https://hackerone.com/reports/627376](https://hackerone.com/reports/627376)
- [https://www.npmjs.com/advisories/1189](https://www.npmjs.com/advisories/1189)

## Related threats

- [http-live-simulator path traversal via relative paths](https://junglewise.ai/threats/cve-2019-5423-http-live-simulator-path-traversal-via-relative-paths)
- [http-live-simulator path traversal](https://junglewise.ai/threats/cve-2018-16479-http-live-simulator-path-traversal)