CVE-1999-0448

Internet Information Server 4.0 - URL Obfuscation via Long HTTP Request Method

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-1999-0448. PoCs published by Mnemonix.

AI-analyzed exploit summary This exploit demonstrates a DoS condition in IIS4 by sending an HTTP GET request with a request method longer than 10150 bytes, which bypasses logging. The code establishes a TCP connection to port 80 and sends a malformed request to trigger the vulnerability.

Description

IIS 4.0 and Apache log HTTP request methods, regardless of how long they are, allowing a remote attacker to hide the URL they really request.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Mnemonix · cremotewindows
https://www.exploit-db.com/exploits/19149

This exploit demonstrates a DoS condition in IIS4 by sending an HTTP GET request with a request method longer than 10150 bytes, which bypasses logging. The code establishes a TCP connection to port 80 and sends a malformed request to trigger the vulnerability.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Microsoft Internet Information Services (IIS) 4.0
No auth needed
Prerequisites: Network access to the target IIS4 server
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (1)

Core 1
Core References
Third Party Advisory, VDB Entry x_refsource_misc
https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0448

Scores

EPSS 0.2419
EPSS Percentile 97.6%

Details

Status published
Products (1)
microsoft/internet_information_server 4.0
Published Jan 01, 1999
Tracked Since Feb 18, 2026