Microsoft W3Who ISAPI w3who.dll memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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9.6$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Microsoft W3Who ISAPI. The affected element is an unknown function in the library w3who.dll. The manipulation leads to memory corruption. This vulnerability is documented as CVE-2004-1134. Additionally, an exploit exists.

Detailsinfo

A vulnerability was found in Microsoft W3Who ISAPI (affected version not known) and classified as very critical. This issue affects some unknown functionality in the library w3who.dll. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Buffer overflow in the Microsoft W3Who ISAPI (w3who.dll) allows remote attackers to cause a denial of service and possibly execute arbitrary code via a long query string.

The bug was discovered 12/06/2004. The weakness was released 01/10/2005 by Nicolas Gregoire with Exaprobe (Website). It is possible to read the advisory at marc.info. The identification of this vulnerability is CVE-2004-1134 since 12/03/2004. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/14/2025).

A public exploit has been developed in Perl Module. The exploit is available at securityfocus.com. It is declared as highly functional. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 15910 (Microsoft W3Who ISAPI w3who.dll Multiple Remote Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CGI abuses and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 90200 (Microsoft Windows 2000 Resource Kit W3Who.DLL Multiple Remote Vulnerabilities).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Attack attempts may be identified with Snort ID 3087. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 3199.

The vulnerability is also documented in the databases at X-Force (18377), Exploit-DB (16354), Tenable (15910), SecurityFocus (BID 11820†) and OSVDB (12258†). Entry connected to this vulnerability is available at VDB-23710. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.6

VulDB Base Score: 10.0
VulDB Temp Score: 9.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 15910
Nessus Name: Microsoft W3Who ISAPI w3who.dll Multiple Remote Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 15910
OpenVAS Name: w3who.dll overflow and XSS
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: w3who_query.rb
MetaSploit Name: Microsoft IIS ISAPI w3who.dll Query String Overflow
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍
Snort ID: 3087
Snort Message: SERVER-IIS w3who.dll buffer overflow attempt
Snort Class: 🔍
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

SourceFire IPS: 🔍
ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍

Timelineinfo

12/03/2004 🔍
12/06/2004 +3 days 🔍
12/06/2004 +0 days 🔍
12/06/2004 +0 days 🔍
12/06/2004 +0 days 🔍
12/12/2004 +6 days 🔍
01/10/2005 +29 days 🔍
01/10/2005 +0 days 🔍
03/10/2015 +3711 days 🔍
09/14/2025 +3841 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: marc.info
Researcher: Nicolas Gregoire
Organization: Exaprobe
Status: Not defined

CVE: CVE-2004-1134 (🔍)
GCVE (CVE): GCVE-0-2004-1134
GCVE (VulDB): GCVE-100-23711
X-Force: 18377
SecurityFocus: 11820 - Microsoft Windows 2000 Resource Kit W3Who.DLL Multiple Remote Vulnerabilities
OSVDB: 12258 - CVE-2004-1134 - Microsoft - W3Who ISAPI - Buffer Overflow Issue
Vulnerability Center: 6416 - Buffer Overflow in Microsoft W3Who ISAPI DLL via Long Query Strings, High

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 03/10/2015 12:14
Updated: 09/14/2025 04:02
Changes: 03/10/2015 12:14 (81), 06/04/2019 17:00 (10), 09/14/2025 04:02 (20)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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