Microsoft IIS 4.0 showcode.asp privileges management

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft IIS 4.0. It has been rated as critical. The impacted element is an unknown function of the file showcode.asp. Performing a manipulation results in privileges management. This vulnerability is reported as CVE-1999-0736. Moreover, an exploit is present. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability, which was classified as critical, was found in Microsoft IIS 4.0 (Web Server). This affects an unknown function of the file showcode.asp. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality. The summary by CVE is:

The showcode.asp sample file in IIS and Site Server allows remote attackers to read arbitrary files.

The weakness was disclosed 05/07/1999 with L0pht as MS99-013 as confirmed bulletin (Technet). The advisory is shared at microsoft.com. This vulnerability is uniquely identified as CVE-1999-0736. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known. MITRE ATT&CK project uses the attack technique T1068 for this issue.

The exploit is shared for download at exploit-db.com. It is declared as highly functional. We expect the 0-day to have been worth approximately $25k-$100k. By approaching the search of inurl:showcode.asp it is possible to find vulnerable targets with Google Hacking. The vulnerability scanner Nessus provides a plugin with the ID 10007 (Microsoft IIS / Site Server showcode.asp source Parameter Traversal Arbitrary File Access), 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 10054 (Microsoft showcode.asp and/or viewcode.asp File Viewing CGI Vulnerability).

Applying the patch MS99-013 is able to eliminate this problem. The bugfix is ready for download at microsoft.com. Attack attempts may be identified with Snort ID 1005. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 1040.

The vulnerability is also documented in the databases at X-Force (2381), Exploit-DB (19129), Tenable (10007), SecurityFocus (BID 167†) and Vulnerability Center (SBV-437†). The entries VDB-14638, VDB-14639, VDB-14640 and VDB-15186 are pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
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: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Download: 🔍
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 10007
Nessus Name: Microsoft IIS / Site Server showcode.asp source Parameter Traversal Arbitrary File Access
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 10007
OpenVAS Name: ShowCode possible
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: MS99-013

Snort ID: 1005
Snort Message: SERVER-IIS codebrowser SDK access
Snort Class: 🔍

Suricata ID: 2101401
Suricata Class: 🔍
Suricata Message: 🔍

TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

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

Timelineinfo

05/07/1999 🔍
05/07/1999 +0 days 🔍
05/07/1999 +0 days 🔍
05/07/1999 +0 days 🔍
07/08/1999 +62 days 🔍
12/19/2002 +1260 days 🔍
06/20/2014 +4201 days 🔍
10/23/2025 +4143 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS99-013
Organization: L0pht
Status: Confirmed

CVE: CVE-1999-0736 (🔍)
GCVE (CVE): GCVE-0-1999-0736
GCVE (VulDB): GCVE-100-14637

OVAL: 🔍

X-Force: 2381
SecurityFocus: 167 - NT IIS Showcode ASP Vulnerability
Vulnerability Center: 437 - [MS99-013] Microsoft IIS / Site Server showcode.asp Allows Remote Arbitrary File Read, Medium

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

Entryinfo

Created: 06/21/2014 00:09
Updated: 10/23/2025 04:20
Changes: 06/21/2014 00:09 (81), 05/06/2019 18:23 (9), 12/08/2024 15:19 (18), 10/23/2025 04:20 (2)
Complete: 🔍
Cache ID: 216::103

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