Szczegóły CWE-178

CWE-178

Improper Handling of Case Sensitivity
Incomplete
2006-07-19
00h00 +00:00
2025-12-11
00h00 +00:00
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Nazwa: Improper Handling of Case Sensitivity

The product does not properly account for differences in case sensitivity when accessing or determining the properties of a resource, leading to inconsistent results.

Informacje ogólne

Sposoby wprowadzenia

Implementation

Odpowiednie platformy

Język

Class: Not Language-Specific (Undetermined)

Systemy operacyjne

Class: Windows (Undetermined)
Class: macOS (Undetermined)

Technologie

Class: Not Technology-Specific (Undetermined)

Typowe konsekwencje

Zakres Wpływ Prawdopodobieństwo
Access ControlBypass Protection Mechanism

Zaobserwowane przykłady

Odniesienia Opis

CVE-2000-0499

Application server allows attackers to bypass execution of a jsp page and read the source code using an upper case JSP extension in the request.

CVE-2000-0497

The server is case sensitive, so filetype handlers treat .jsp and .JSP as different extensions. JSP source code may be read because .JSP defaults to the filetype "text".

CVE-2000-0498

The server is case sensitive, so filetype handlers treat .jsp and .JSP as different extensions. JSP source code may be read because .JSP defaults to the filetype "text".

CVE-2001-0766

A URL that contains some characters whose case is not matched by the server's filters may bypass access restrictions because the case-insensitive file system will then handle the request after it bypasses the case sensitive filter.

CVE-2001-0795

Server allows remote attackers to obtain source code of CGI scripts via URLs that contain MS-DOS conventions such as (1) upper case letters or (2) 8.3 file names.

CVE-2001-1238

Task Manager does not allow local users to end processes with uppercase letters named (1) winlogon.exe, (2) csrss.exe, (3) smss.exe and (4) services.exe via the Process tab which could allow local users to install Trojan horses that cannot be stopped.

CVE-2003-0411

chain: Code was ported from a case-sensitive Unix platform to a case-insensitive Windows platform where filetype handlers treat .jsp and .JSP as different extensions. JSP source code may be read because .JSP defaults to the filetype "text".

CVE-2002-0485

Leads to interpretation error

CVE-1999-0239

Directories may be listed because lower case web requests are not properly handled by the server.

CVE-2005-0269

File extension check in forum software only verifies extensions that contain all lowercase letters, which allows remote attackers to upload arbitrary files via file extensions that include uppercase letters.

CVE-2004-1083

Web server restricts access to files in a case sensitive manner, but the filesystem accesses files in a case insensitive manner, which allows remote attackers to read privileged files using alternate capitalization.

CVE-2002-2119

Case insensitive passwords lead to search space reduction.

CVE-2004-2214

HTTP server allows bypass of access restrictions using URIs with mixed case.

CVE-2004-2154

Mixed upper/lowercase allows bypass of ACLs.

CVE-2005-4509

Bypass malicious script detection by using tokens that aren't case sensitive.

CVE-2002-1820

Mixed case problem allows "admin" to have "Admin" rights (alternate name property).

CVE-2007-3365

Chain: uppercase file extensions causes web server to return script source code instead of executing the script.

CVE-2021-39155

Chain: A microservice integration and management platform compares the hostname in the HTTP Host header in a case-sensitive way (CWE-178, CWE-1289), allowing bypass of the authorization policy (CWE-863) using a hostname with mixed case or other variations.

Potencjalne środki zaradcze

Phases : Architecture and Design
Avoid making decisions based on names of resources (e.g. files) if those resources can have alternate names.
Phases : Implementation
Phases : Implementation
Inputs should be decoded and canonicalized to the application's current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174). Such errors could be used to bypass allowlist validation schemes by introducing dangerous inputs after they have been checked.

Uwagi dotyczące mapowania podatności

Uzasadnienie : This CWE entry is at the Base level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.
Komentarz : Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.

Notatki

These are probably under-studied in Windows and Mac environments, where file names are case-insensitive and thus are subject to equivalence manipulations involving case.

Zgłoszenie

Nazwa Organizacja Data Data wydania Version
PLOVER 2006-07-19 +00:00 2006-07-19 +00:00 Draft 3

Modyfikacje

Nazwa Organizacja Data Komentarz
Sean Eidemiller Cigital 2008-07-01 +00:00 added/updated demonstrative examples
Eric Dalci Cigital 2008-07-01 +00:00 updated Potential_Mitigations, Time_of_Introduction
CWE Content Team MITRE 2008-09-08 +00:00 updated Description, Relationships, Observed_Example, Taxonomy_Mappings
CWE Content Team MITRE 2008-10-14 +00:00 updated Observed_Examples
CWE Content Team MITRE 2008-11-24 +00:00 updated Observed_Examples
CWE Content Team MITRE 2009-03-10 +00:00 updated Description
CWE Content Team MITRE 2009-07-27 +00:00 updated Potential_Mitigations
CWE Content Team MITRE 2010-06-21 +00:00 updated Demonstrative_Examples
CWE Content Team MITRE 2010-12-13 +00:00 updated Name
CWE Content Team MITRE 2011-03-29 +00:00 updated Potential_Mitigations
CWE Content Team MITRE 2011-06-01 +00:00 updated Common_Consequences
CWE Content Team MITRE 2012-05-11 +00:00 updated Observed_Examples, Relationships
CWE Content Team MITRE 2012-10-30 +00:00 updated Demonstrative_Examples, Potential_Mitigations
CWE Content Team MITRE 2014-07-30 +00:00 updated Relationships
CWE Content Team MITRE 2017-11-08 +00:00 updated Affected_Resources, Applicable_Platforms, Functional_Areas, Relationships
CWE Content Team MITRE 2019-06-20 +00:00 updated Relationships
CWE Content Team MITRE 2020-02-24 +00:00 updated Potential_Mitigations, Relationships
CWE Content Team MITRE 2020-06-25 +00:00 updated Demonstrative_Examples, Potential_Mitigations, Relationships
CWE Content Team MITRE 2021-03-15 +00:00 updated Demonstrative_Examples
CWE Content Team MITRE 2022-10-13 +00:00 updated Observed_Examples
CWE Content Team MITRE 2023-01-31 +00:00 updated Description
CWE Content Team MITRE 2023-04-27 +00:00 updated Relationships
CWE Content Team MITRE 2023-06-29 +00:00 updated Mapping_Notes
CWE Content Team MITRE 2025-12-11 +00:00 updated Applicable_Platforms, Weakness_Ordinalities