CVE-2019-16771
Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') in Armeria
Description
Versions of Armeria 0.85.0 through and including 0.96.0 are vulnerable to HTTP response splitting, which allows remote attackers to inject arbitrary HTTP headers via CRLF sequences when unsanitized data is used to populate the headers of an HTTP response. ### Impact 1. Cross-User Defacement 2. Cache Poisoning 3. Cross-Site Scripting (XSS) 4. Page Hijacking ### Root Cause The root cause is due to the usage of Netty without the HTTP header validation. https://github.com/line/armeria/blob/f0d870fde1088114070be31b67f7df0a21e835c6/core/src/main/java/com/linecorp/armeria/common/DefaultHttpHeaders.java#L23 ### Patches This vulnerability has been patched in 0.97.0. ### References [CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting')](https://cwe.mitre.org/data/definitions/113.html) https://github.com/ratpack/ratpack/security/advisories/GHSA-mvqp-q37c-wf9j ### For more information If you have any questions or comments about this advisory: * Open an issue in [GitHub](https://github.com/line/armeria/issues)
How to fix CVE-2019-16771
To remediate CVE-2019-16771, upgrade the affected package to a fixed version below.
- —upgrade to 0.97.0 or later
- —upgrade to 0.97.0 or later
Is CVE-2019-16771 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- >= 0.50.0, < 0.97.0
- >= 0.85.0, < 0.97.0