CVE-1999-0844

MDaemon - Denial of Service via Long URL

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-1999-0844. PoCs published by Ussr Labs.

AI-analyzed exploit summary This exploit demonstrates a denial of service vulnerability in Alt-N's WorldClient email webserver by sending an overly long URL, which crashes the server due to an unchecked buffer in the request handler.

Description

Denial of service in MDaemon WorldClient and WebConfig services via a long URL.

Exploits (2)

exploitdb WORKING POC VERIFIED
by Ussr Labs · textdoswindows
https://www.exploit-db.com/exploits/19640

This exploit demonstrates a denial of service vulnerability in Alt-N's WorldClient email webserver by sending an overly long URL, which crashes the server due to an unchecked buffer in the request handler.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Alt-N WorldClient
No auth needed
Prerequisites: Network access to the target server
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WRITEUP VERIFIED
by Ussr Labs · textdoswindows
https://www.exploit-db.com/exploits/19639

The exploit describes a buffer overflow vulnerability in Mdaemon's web server component (WebConfig) via an abnormally large URL sent to port 2002, leading to a DoS condition. The provided links point to binary exploits but no actual code is included in the text.

Classification
Writeup 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Mdaemon mail server (version not specified)
No auth needed
Prerequisites: Network access to port 2002 of the target
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/823
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/820

Scores

EPSS 0.0583
EPSS Percentile 92.2%

Details

Status published
Products (2)
deerfield/mdaemon 2.8.5
deerfield/mdaemon 2.8.6
Published Nov 24, 1999
Tracked Since Feb 18, 2026