Microsoft IIS 4.0/5.0 File Permission 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 categorized as critical has been discovered in Microsoft IIS 4.0/5.0. The affected element is an unknown function of the component File Permission Handler. The manipulation results in privileges management. This vulnerability is reported as CVE-2000-0770. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Microsoft IIS 4.0/5.0 (Web Server). Affected is an unknown functionality of the component File Permission Handler. 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, and integrity. CVE summarizes:

IIS 4.0 and 5.0 does not properly restrict access to certain types of files when their parent folders have less restrictive permissions, which could allow remote attackers to bypass access restrictions to some files, aka the "File Permission Canonicalization" vulnerability.

The weakness was disclosed 10/20/2000 as MS00-057 as confirmed bulletin (Technet). The advisory is shared for download at microsoft.com. This vulnerability is traded as CVE-2000-0770. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 86255 (Microsoft IIS 4.0/5.0 File Permission Canonicalization Vulnerability (MS00-057)).

Upgrading eliminates this vulnerability. Applying the patch MS00-057 is able to eliminate this problem. The bugfix is ready for download at microsoft.com. The best possible mitigation is suggested to be upgrading to the latest version. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 234.

The vulnerability is also documented in the databases at SecurityFocus (BID 1565†) and Vulnerability Center (SBV-1374†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

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: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

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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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: MS00-057
TippingPoint: 🔍

Timelineinfo

08/10/2000 🔍
10/20/2000 +71 days 🔍
10/20/2000 +0 days 🔍
10/20/2000 +0 days 🔍
07/02/2003 +985 days 🔍
06/27/2014 +4013 days 🔍
10/12/2025 +4125 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS00-057
Status: Confirmed

CVE: CVE-2000-0770 (🔍)
GCVE (CVE): GCVE-0-2000-0770
GCVE (VulDB): GCVE-100-15912
SecurityFocus: 1565 - Microsoft IIS 4.0/5.0 File Permission Canonicalization Vulnerability
Vulnerability Center: 1374 - [MS00-057] IIS 4.0 / 5.0 Allows Bypassing File Access Restrictions due to Canonization Error, Medium

Entryinfo

Created: 06/27/2014 17:38
Updated: 10/12/2025 20:32
Changes: 06/27/2014 17:38 (62), 05/10/2019 15:52 (1), 10/12/2025 20:32 (18)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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