CVE-2018-11763
UnknownEPSS 51.00%
Last modified
CVE-2018-11763 is a vulnerability of currently unknown severity. In Apache HTTP Server 2.4.17 to 2.4.34, by sending continuous, large SETTINGS frames a client can occupy a connection, server thread and CPU time without any connection timeout coming to effect. This affects only HTTP/2 connections. EPSS estimates a 51.00% chance of exploitation in the next 30 days.
Description
In Apache HTTP Server 2.4.17 to 2.4.34, by sending continuous, large SETTINGS frames a client can occupy a connection, server thread and CPU time without any connection timeout coming to effect. This affects only HTTP/2 connections. A possible mitigation is to not enable the h2 protocol.
Metrics
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apache | Http Server | >= 2.4.17, <= 2.4.34 |
| Canonical | Ubuntu Linux | 18.04 |
| Redhat | Enterprise Linux | 6.0 |
| Redhat | Enterprise Linux | 7.0 |
| Redhat | Enterprise Linux | 7.4 |
| Redhat | Enterprise Linux | 7.5 |
| Redhat | Enterprise Linux | 7.6 |
| Oracle | Enterprise Manager Ops Center | 12.3.3 |
| Oracle | Hospitality Guest Access | 4.2.0 |
| Oracle | Hospitality Guest Access | 4.2.1 |
| Oracle | Instantis Enterprisetrack | 17.1 |
| Oracle | Instantis Enterprisetrack | 17.2 |
| Oracle | Instantis Enterprisetrack | 17.3 |
| Oracle | Retail Xstore Point Of Service | 7.0 |
| Oracle | Retail Xstore Point Of Service | 7.1 |
| Oracle | Secure Global Desktop | 5.4 |
| Netapp | Storage Automation Store | All versions |
References
- http://www.securityfocus.com/bid/105414Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041713Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:3558Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0366Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0367Third Party Advisory
- https://httpd.apache.org/security/vulnerabilities_24.htmlVendor Advisory
- https://security.netapp.com/advisory/ntap-20190204-0004/Third Party Advisory
- https://usn.ubuntu.com/3783-1/Third Party Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.htmlPatch, Third Party Advisory
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.htmlPatch, Third Party Advisory
- http://www.securityfocus.com/bid/105414Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041713Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:3558Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0366Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0367Third Party Advisory
- https://httpd.apache.org/security/vulnerabilities_24.htmlVendor Advisory
- https://security.netapp.com/advisory/ntap-20190204-0004/Third Party Advisory
- https://usn.ubuntu.com/3783-1/Third Party Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.htmlPatch, Third Party Advisory
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.htmlPatch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2018-11763?
In Apache HTTP Server 2.4.17 to 2.4.34, by sending continuous, large SETTINGS frames a client can occupy a connection, server thread and CPU time without any connection timeout coming to effect. This affects only HTTP/2 connections. A possible mitigation is to not enable the h2 protocol.
How severe is CVE-2018-11763?
Severity scoring for CVE-2018-11763 is pending analysis. The EPSS model estimates a 51.00% probability of exploitation in the next 30 days.
How do I fix CVE-2018-11763?
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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Scan your code nowSource: NVD / NIST