CVE-2019-16869
HIGHCVSS 7.5/10EPSS 8.42%
Last modified
CVE-2019-16869 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Netty before 4.1.42.Final mishandles whitespace before the colon in HTTP headers (such as a "Transfer-Encoding : chunked" line), which leads to HTTP request smuggling.. EPSS estimates a 8.42% chance of exploitation in the next 30 days.
Description
Netty before 4.1.42.Final mishandles whitespace before the colon in HTTP headers (such as a "Transfer-Encoding : chunked" line), which leads to HTTP request smuggling.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Netty | Netty | < 4.1.42 |
| Debian | Debian Linux | 8.0 |
| Debian | Debian Linux | 9.0 |
| Debian | Debian Linux | 10.0 |
| Canonical | Ubuntu Linux | 18.04 |
| Redhat | Jboss Enterprise Application Platform | 7.2 |
| Redhat | Jboss Enterprise Application Platform | 7.3 |
| Redhat | Jboss Enterprise Application Platform | 7.4 |
References
- https://access.redhat.com/errata/RHSA-2019:3892Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3901Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0159Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0160Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0161Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0164Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0445Third Party Advisory
- https://github.com/netty/netty/compare/netty-4.1.41.Final...netty-4.1.42.FinalPatch, Third Party Advisory
- https://github.com/netty/netty/issues/9571Exploit, Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/09/msg00035.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/02/msg00018.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/09/msg00004.htmlMailing List, Third Party Advisory
- https://seclists.org/bugtraq/2020/Jan/6Issue Tracking, Mailing List, Third Party Advisory
- https://usn.ubuntu.com/4532-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4597Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3892Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3901Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0159Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0160Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0161Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0164Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0445Third Party Advisory
- https://github.com/netty/netty/compare/netty-4.1.41.Final...netty-4.1.42.FinalPatch, Third Party Advisory
- https://github.com/netty/netty/issues/9571Exploit, Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/09/msg00035.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/02/msg00018.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/09/msg00004.htmlMailing List, Third Party Advisory
- https://seclists.org/bugtraq/2020/Jan/6Issue Tracking, Mailing List, Third Party Advisory
- https://usn.ubuntu.com/4532-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4597Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2019-16869?
Netty before 4.1.42.Final mishandles whitespace before the colon in HTTP headers (such as a "Transfer-Encoding : chunked" line), which leads to HTTP request smuggling.
How severe is CVE-2019-16869?
CVE-2019-16869 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 8.42% probability of exploitation in the next 30 days.
How do I fix CVE-2019-16869?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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