CVE-2009-2918

TheGreenBow IPSec VPN Client 4.61.003 - Denial of Service via tgbvpn.sys IOCTL 0x80000034

Title source: llm

Exploitation Summary

EIP tracks 1 public exploit for CVE-2009-2918. PoCs published by Evilcry.

AI-analyzed exploit summary This exploit demonstrates a local denial-of-service (DoS) vulnerability in TheGreenBow VPN Client 4.61.003 by sending a malformed IOCTL request (0x80000034) to the tgbvpn.sys driver, causing a BSOD. The PoC includes a C program that opens a handle to the driver and triggers the vulnerability.

Description

The tgbvpn.sys driver in TheGreenBow IPSec VPN Client 4.61.003 allows local users to cause a denial of service (NULL pointer dereference and system crash) via a crafted request to the 0x80000034 IOCTL, probably involving an input or output buffer size of 0.

Exploits (1)

exploitdb WORKING POC VERIFIED

by Evilcry · textdoswindows

https://www.exploit-db.com/exploits/9449

View Code ZIP pw:eip

This exploit demonstrates a local denial-of-service (DoS) vulnerability in TheGreenBow VPN Client 4.61.003 by sending a malformed IOCTL request (0x80000034) to the tgbvpn.sys driver, causing a BSOD. The PoC includes a C program that opens a handle to the driver and triggers the vulnerability.

Classification

Working Poc 90%

Attack Type

Dos

Complexity

Trivial

Reliability

Reliable

Target: TheGreenBow VPN Client 4.61.003

No auth needed

Prerequisites: Local access to the system · TheGreenBow VPN Client 4.61.003 installed

MITRE ATT&CK

T1499 - Endpoint Denial of Service

devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4

Core References

Exploit x_refsource_misc

https://www.evilfingers.com/advisory/Advisory/TheGreenBow_VPN_Client_tgbvpn.sys_DoS.php

Vendor Advisory third-party-advisory x_refsource_secunia

http://secunia.com/advisories/36332

Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq

http://www.securityfocus.com/archive/1/505816/100/0/threaded

Vendor Advisory vdb-entry x_refsource_vupen

http://www.vupen.com/english/advisories/2009/2294

Scores

EPSS 0.0085

EPSS Percentile 53.7%

Details

CWE

CWE-20

Status published

Products (1)

thegreenbow/thegreenbow_vpn_client 4.61.003

Published Aug 21, 2009

Tracked Since Feb 18, 2026