CVE-2003-0471

Alt-N WebAdmin - Buffer Overflow via USER Argument

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 5 public exploits for CVE-2003-0471. PoCs published by Metasploit, y0, Mark Litchfield, including Metasploit module exploits/windows/http/altn_webadmin.

AI-analyzed exploit summary This is a Metasploit module exploiting a buffer overflow in Alt-N WebAdmin via the USER parameter. It sends a maliciously crafted POST request to execute arbitrary code with SYSTEM privileges.

Description

Buffer overflow in WebAdmin.exe for WebAdmin allows remote attackers to execute arbitrary code via an HTTP request to WebAdmin.dll with a long USER argument.

Exploits (5)

exploitdb WORKING POC VERIFIED
by Metasploit · rubyremotewindows
https://www.exploit-db.com/exploits/16776

This is a Metasploit module exploiting a buffer overflow in Alt-N WebAdmin via the USER parameter. It sends a maliciously crafted POST request to execute arbitrary code with SYSTEM privileges.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Alt-N WebAdmin 2.0.1 - 2.0.4
No auth needed
Prerequisites: Network access to the target's WebAdmin service (port 1000 by default)
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by y0 · remotewindows
https://www.exploit-db.com/exploits/1210

This is a Metasploit module exploiting a buffer overflow in Alt-N WebAdmin via the USER parameter. It sends a crafted POST request with a malicious payload to achieve remote code execution.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Alt-N WebAdmin 2.0.1 - 2.0.4
No auth needed
Prerequisites: Network access to the target · WebAdmin service running on port 1000
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by Mark Litchfield · cremotewindows
https://www.exploit-db.com/exploits/22834

This exploit targets a buffer overflow in Alt-N WebAdmin via the USER parameter, allowing remote code execution with SYSTEM privileges. It uses a custom shellcode to download and execute a payload from a specified URL.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Alt-N WebAdmin 2.0.3 and 2.0.4
No auth needed
Prerequisites: Network access to the target · Target running vulnerable version of Alt-N WebAdmin
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by Mark Litchfield · cremotewindows
https://www.exploit-db.com/exploits/22833

This exploit targets a buffer overflow in Alt-N WebAdmin 2.0.4 via the USER parameter, allowing remote code execution with SYSTEM privileges. It uses a crafted HTTP POST request with shellcode to spawn a command prompt on the victim machine.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Alt-N WebAdmin 2.0.4
No auth needed
Prerequisites: Network access to the target server · WebAdmin service running on port specified
devstral-2 · analyzed Feb 16, 2026 Full analysis →
metasploit WORKING POC NORMAL
by MC · rubypocwin
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/altn_webadmin.rb

This Metasploit module exploits a buffer overflow in Alt-N WebAdmin via the USER parameter, allowing remote code execution with SYSTEM privileges. It includes target-specific return addresses and payload handling for versions 2.0.1 to 2.0.4.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Alt-N WebAdmin 2.0.1 - 2.0.4
No auth needed
Prerequisites: Network access to the target service on port 1000 · Vulnerable version of Alt-N WebAdmin
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/8024
Mailing List mailing-list x_refsource_bugtraq
http://marc.info/?l=bugtraq&m=105648385900792&w=2
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://www.osvdb.org/2207
Mailing List mailing-list x_refsource_bugtraq
http://marc.info/?l=bugtraq&m=105647081418155&w=2

Scores

EPSS 0.6095
EPSS Percentile 99.0%

Details

Status published
Products (1)
alt-n/webadmin
Published Aug 07, 2003
Tracked Since Feb 18, 2026