Remote denial of service in Apache HTTP Server

Published: 2018-09-27
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-11763
Exploitation vector Network
Public exploit N/A
Vulnerable software
Apache HTTP Server
Server applications / Web servers

Vendor Apache Foundation

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Resource management error

EUVDB-ID: #VU14913

Risk: Medium


CVE-ID: CVE-2018-11763

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to incorrect handling of large SETTINGS frames in HTTP/2 connections. A remote attacker can repeatedly send large SETTINGS frames within an established HTTP/2 connection and consume all available threads and CPU time.

Successful exploitation of the vulnerability may allow an attacker to perform a denial of service (DoS) attack.


Update to version 2.4.35.

Vulnerable software versions

Apache HTTP Server: 2.4.17 - 2.4.34

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?