# CVE-2019-16771: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') in Armeria

Source: https://junglewise.ai/threats/cve-2019-16771-low-severity-vulnerability-that-affects-com-linecorp-armeria  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2019-12-06  
License: CC BY 4.0 with a link back

CVE-2019-16771 · Severity: low · CVSS 3.1 · Published 2019-12-06

Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') in Armeria

Technologies: [com.linecorp.armeria:armeria (Maven)](https://junglewise.ai/threats/technologies/com-linecorp-armeria-armeria). Vendors: [Maven](https://junglewise.ai/threats/vendors/maven).

## Quick answers

**Is CVE-2019-16771 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2019-16771 being exploited in the wild.

**How severe is CVE-2019-16771?** Low severity, with a CVSS score of 3.1, published 6 December 2019.

**Which products and versions are affected?** com.linecorp.armeria:armeria (Maven) ECOSYSTEM:introduced=0.50.0,fixed=0.97.0, ECOSYSTEM:introduced=0.85.0,fixed=0.97.0.

**Is there a fix for CVE-2019-16771?** Yes. com.linecorp.armeria:armeria (Maven): upgrade to 0.97.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2019-16771?** Check whether you run com.linecorp.armeria:armeria (Maven) 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

- com.linecorp.armeria:armeria (Maven): upgrade to 0.97.0 or later

  ```sh
  # set com.linecorp.armeria:armeria to 0.97.0 in your pom.xml or build.gradle
  ```


## Affected products

- com.linecorp.armeria:armeria (Maven) ECOSYSTEM:introduced=0.50.0,fixed=0.97.0, ECOSYSTEM:introduced=0.85.0,fixed=0.97.0

## Identifiers

- CVE-2019-16771
- GHSA-24r8-fm9r-cpj2
- GHSA-35fr-h7jr-hh86

## Related threats

- [Paths contain matrix variables bypass decorators](https://junglewise.ai/threats/cve-2023-38493-paths-contain-matrix-variables-bypass-decorators)
- [Path Traversal in com.linecorp.armeria:armeria](https://junglewise.ai/threats/cve-2021-43795-path-traversal-in-com-linecorp-armeria-armeria)