Epic Games Unreal Tournament Server DoS Amplifier Vulnerability

BID:5148

Info

Epic Games Unreal Tournament Server DoS Amplifier Vulnerability

Bugtraq ID: 5148
Class: Design Error
CVE:
Remote: Yes
Local: No
Published: Jul 03 2002 12:00AM
Updated: Jul 03 2002 12:00AM
Credit: Published by Auriemma Luigi <[email protected]>.
Vulnerable: Epic Games Unreal Tournament Server 436.0
Not Vulnerable:

Discussion

Epic Games Unreal Tournament Server DoS Amplifier Vulnerability

Unreal Tournament is a game produced by Epic Games, available for Microsoft Windows and Linux. Network play is supported. A vulnerability has been reported in the server used for network play.

It is possible to use an Unreal Tournament server as an amplifyer in a flooding attack, by transmiting multiple UDP packets with a spoofed victim IP address. The server will make repeated attempts to initiate a connection with the specified address, consuming network resources.

Exploit / POC

Epic Games Unreal Tournament Server DoS Amplifier Vulnerability

An exploit has been provided by Auriemma Luigi <[email protected]>:

Solution / Fix

Epic Games Unreal Tournament Server DoS Amplifier Vulnerability

Solution:
Auriemma Luigi <[email protected]> has suggested that the InitialConnectTimeout key in the [IpDrv.TcpNetDriver] configuration section be reduced from it's default value of 150 seconds to a more reasonable constant. This may reduce the severity of an attack.

The vendor has released a replacement IpDrv.dll for vulnerable Microsoft Windows based servers which resolves this issue:


Epic Games Unreal Tournament Server 436.0

References

Epic Games Unreal Tournament Server DoS Amplifier Vulnerability

References:

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report