Vulnerability in Apache HTTP Server
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.508 (98.9th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 98.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.508 · newest: 0.508 · change: 0.000
Affected products
- Apache HTTP Server
- Apache Software Foundation HTTP Server — versions 2.4.17 to 2.4.34
- NetApp Storage Automation Store
- Oracle Enterprise Manager Ops Center — versions 12.3.3
- Oracle Hospitality Guest Access — versions 4.2.0, 4.2.1
- Oracle Instantis Enterprisetrack — versions 17.1, 17.2, 17.3
- Oracle Retail Xstore Point Of Service — versions 7.0, 7.1
- Oracle Secure Global Desktop — versions 5.4
- Canonical Ubuntu Linux — versions 18.04
- Red Hat Enterprise Linux — versions 6.0, 7.0, 7.4
Public proof-of-concept exploits
- NeoOniX/5ATTACK
- PawanKumarPandit/Shodan-nrich
- RoseSecurity-Research/Red-Teaming-TTPs
- RoseSecurity/Red-Teaming-TTPs
- Xorlent/Red-Teaming-TTPs
- austin-lai/External-Penetration-Testing-Holo-Corporate-Network-TryHackMe-Holo-Network
- bartholomex-x/nrich
- bioly230/THM_
- retr0-13/nrich
- vshaliii/Basic-Pentesting-2-Vulnhub-Walkthrough
References
- www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html (Patch, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:3558 (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/105414 (VDB Entry, Third Party Advisory, vdb-entry)
- support.hpe.com/hpsc/doc/public/display (Third Party Advisory)
- security.netapp.com/advisory/ntap-20190204-0004/ (Third Party Advisory)
- access.redhat.com/errata/RHSA-2019:0367 (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3783-1/ (vendor-advisory, Third Party Advisory)
- httpd.apache.org/security/vulnerabilities_24.html (Vendor Advisory)
- www.securitytracker.com/id/1041713 (VDB Entry, Third Party Advisory, vdb-entry)
- access.redhat.com/errata/RHSA-2019:0366 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-11763?
- CVE-2018-11763 is a medium-severity vulnerability in Apache HTTP Server. CVSS score: 5.9/10. Published 2018-09-25.
- How severe is CVE-2018-11763?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2018-11763 known to be exploited?
- 13 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.