Microsoft IIS 4.0 URL privileges management

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Microsoft IIS 4.0. This impacts an unknown function of the component URL Handler. This manipulation causes privileges management. The identification of this vulnerability is CVE-2000-0024. There is no exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability has been found in Microsoft IIS 4.0 (Web Server) and classified as critical. Affected by this vulnerability is an unknown functionality of the component URL Handler. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, and integrity. The summary by CVE is:

IIS does not properly canonicalize URLs, potentially allowing remote attackers to bypass access restrictions in third-party software via escape characters, aka the "Escape Character Parsing" vulnerability.

The weakness was shared 12/21/1999 by Security Team with ACROS Security as MS99-061 as confirmed bulletin (Technet). It is possible to read the advisory at technet.microsoft.com. This vulnerability is known as CVE-2000-0024. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

Applying the patch MS99-061 is able to eliminate this problem. The bugfix is ready for download at technet.microsoft.com. Attack attempts may be identified with Snort ID 1010.

The vulnerability is also documented in the databases at X-Force (3731), SecurityFocus (BID 886†) and Vulnerability Center (SBV-760†). Additional details are provided at support.microsoft.com. The entry VDB-15080 is related to this item. 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: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: MS99-061

Snort ID: 1010
Snort Message: SERVER-IIS encoding access
Snort Class: 🔍
McAfee IPS: 🔍
McAfee IPS Version: 🔍

SourceFire IPS: 🔍
ISS Proventia IPS: 🔍

Timelineinfo

12/21/1999 🔍
12/21/1999 +0 days 🔍
12/21/1999 +0 days 🔍
12/21/1999 +0 days 🔍
01/29/2003 +1135 days 🔍
06/22/2014 +4162 days 🔍
04/20/2026 +4319 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS99-061
Researcher: Security Team
Organization: ACROS Security
Status: Confirmed

CVE: CVE-2000-0024 (🔍)
GCVE (CVE): GCVE-0-2000-0024
GCVE (VulDB): GCVE-100-15079
X-Force: 3731
SecurityFocus: 886 - Microsoft IIS Escape Character Parsing Vulnerability
Vulnerability Center: 760 - [MS99-061] Microsoft IIS Bypassing of Access Restrictions via Escape Characters in URLs, Medium

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 06/22/2014 16:14
Updated: 04/20/2026 00:34
Changes: 06/22/2014 16:14 (70), 05/08/2019 16:22 (4), 04/20/2026 00:34 (16)
Complete: 🔍
Cache ID: 216::103

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