CVE-2006-0734

Half-Life CSTRIKE Dedicated Server < 1.6_linux - Authenticated Denial of Service via Backslash in Connection String

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2006-0734. PoCs published by Firestorm.

AI-analyzed exploit summary This Perl script exploits a denial-of-service (DoS) vulnerability in the Half-Life engine by sending malformed UDP packets to port 27015. It forks to create two connections, sending a 'getchallenge' request followed by a crafted 'connect' command to trigger the DoS.

Description

The SV_CheckForDuplicateNames function in Valve Software Half-Life CSTRIKE Dedicated Server 1.6 and earlier allows remote authenticated users to cause a denial of service (infinite loop and daemon hang) via a backslash character at the end of a connection string to UDP port 27015.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Firestorm · perldosmultiple
https://www.exploit-db.com/exploits/1483

This Perl script exploits a denial-of-service (DoS) vulnerability in the Half-Life engine by sending malformed UDP packets to port 27015. It forks to create two connections, sending a 'getchallenge' request followed by a crafted 'connect' command to trigger the DoS.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Half-Life engine (tested on Counter-Strike 1.6 Windows and Linux dedicated servers)
No auth needed
Prerequisites: Network access to the target server on UDP port 27015
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/16619
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/33505
Third Party Advisory x_refsource_misc
http://aluigi.altervista.org/adv/csdos.txt

Scores

EPSS 0.0251
EPSS Percentile 82.7%

Details

CWE
CWE-119
Status published
Products (1)
valve_software/half-life_cstrike_dedicated_server < 1.6_linux
Published Feb 16, 2006
Tracked Since Feb 18, 2026