CVE-2001-0239

Microsoft ISA Server 2000 - Denial of Service via Long Web Request

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2001-0239. PoCs published by SecureXpert Labs.

AI-analyzed exploit summary The provided code is a writeup describing a DoS vulnerability in MS ISA Server's Web Proxy service, triggered by an unusually long HTTP path. The included C code is a utility to generate repeated characters, not an exploit itself.

Description

Microsoft Internet Security and Acceleration (ISA) Server 2000 Web Proxy allows remote attackers to cause a denial of service via a long web request with a specific type.

Exploits (1)

exploitdb WRITEUP VERIFIED
by SecureXpert Labs · cdoswindows
https://www.exploit-db.com/exploits/20763

The provided code is a writeup describing a DoS vulnerability in MS ISA Server's Web Proxy service, triggered by an unusually long HTTP path. The included C code is a utility to generate repeated characters, not an exploit itself.

Classification
Writeup 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Theoretical
Target: Microsoft ISA Server (Web Proxy service)
No auth needed
Prerequisites: Network access to the Web Proxy service · Web Publishing enabled for external exploitation
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (7)

Core 7
Core References
Exploit, Vendor Advisory mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/176912
Vendor Advisory mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/177160
Exploit, Vendor Advisory mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/179986
Exploit, Patch, Vendor Advisory vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/2600
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/6383
Third Party Advisory, US Government Resource third-party-advisory government-resource x_refsource_ciac
http://www.ciac.org/ciac/bulletins/l-073.shtml

Scores

EPSS 0.2796
EPSS Percentile 97.9%

Details

Status published
Products (1)
microsoft/isa_server 2000
Published Jul 02, 2001
Tracked Since Feb 18, 2026