CVE-2000-0426

UltraBoard 1.6 - Denial of Service via Session Parameter

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2000-0426. PoCs published by Juan M. Bello Rivas.

AI-analyzed exploit summary This exploit targets UltraBoard 1.6 and potentially other versions by sending a malformed request to the CGI script, causing a fork bomb that consumes server resources, leading to a Denial of Service (DoS). The attack leverages a null byte and pipe character to trigger the vulnerability.

Description

UltraBoard 1.6 and other versions allow remote attackers to cause a denial of service by referencing UltraBoard in the Session parameter, which causes UltraBoard to fork copies of itself.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Juan M. Bello Rivas · textdoscgi
https://www.exploit-db.com/exploits/19899

This exploit targets UltraBoard 1.6 and potentially other versions by sending a malformed request to the CGI script, causing a fork bomb that consumes server resources, leading to a Denial of Service (DoS). The attack leverages a null byte and pipe character to trigger the vulnerability.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: UltraBoard 1.6 (and possibly 1.x and UltraBoard 2000 beta)
No auth needed
Prerequisites: Access to the target web server hosting UltraBoard
mistral-large-3 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2
Core References
Third Party Advisory mailing-list x_refsource_bugtraq
http://archives.neohapsis.com/archives/bugtraq/2000-05/0059.html
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/1175

Scores

EPSS 0.0253
EPSS Percentile 83.0%

Details

Status published
Products (1)
ultrascripts/ultraboard 1.6
Published May 05, 2000
Tracked Since Feb 18, 2026