CVE-2020-7238
HIGHCVSS 7.5/10EPSS 3.62%
Last modified
CVE-2020-7238 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Netty 4.1.43.Final allows HTTP Request Smuggling because it mishandles Transfer-Encoding whitespace (such as a [space]Transfer-Encoding:chunked line) and a later Content-Length header. This issue exists because of an incomplete fix for CVE-2019-16869.. EPSS estimates a 3.62% chance of exploitation in the next 30 days.
Description
Netty 4.1.43.Final allows HTTP Request Smuggling because it mishandles Transfer-Encoding whitespace (such as a [space]Transfer-Encoding:chunked line) and a later Content-Length header. This issue exists because of an incomplete fix for CVE-2019-16869.
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 | 4.1.43 |
| Fedoraproject | Fedora | 33 |
| Debian | Debian Linux | 8.0 |
| Debian | Debian Linux | 9.0 |
| Debian | Debian Linux | 10.0 |
| Redhat | Jboss Enterprise Application Platform | 7.2 |
| Redhat | Jboss Enterprise Application Platform | 7.3 |
| Redhat | Jboss Enterprise Application Platform | 7.4 |
| Redhat | Jboss Enterprise Application Platform Text-Only Advisories | All versions |
| Redhat | Openshift Application Runtimes Text-Only Advisories | All versions |
References
- https://access.redhat.com/errata/RHSA-2020:0497Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0567Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0601Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0605Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0606Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0804Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0805Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0806Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0811Third Party Advisory
- https://github.com/jdordonezn/CVE-2020-72381/issues/1Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/02/msg00017.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/msg00003.htmlMailing List, Third Party Advisory
- https://netty.io/news/Vendor Advisory
- https://www.debian.org/security/2021/dsa-4885Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0497Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0567Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0601Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0605Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0606Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0804Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0805Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0806Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0811Third Party Advisory
- https://github.com/jdordonezn/CVE-2020-72381/issues/1Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/02/msg00017.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/msg00003.htmlMailing List, Third Party Advisory
- https://netty.io/news/Vendor Advisory
- https://www.debian.org/security/2021/dsa-4885Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-7238?
Netty 4.1.43.Final allows HTTP Request Smuggling because it mishandles Transfer-Encoding whitespace (such as a [space]Transfer-Encoding:chunked line) and a later Content-Length header. This issue exists because of an incomplete fix for CVE-2019-16869.
How severe is CVE-2020-7238?
CVE-2020-7238 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.62% probability of exploitation in the next 30 days.
How do I fix CVE-2020-7238?
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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Are you affected by CVE-2020-7238?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST