CWE

Common Weakness Enumeration

A Community-Developed List of Software Weakness Types

CWE/SANS Top 25 Most Dangerous Software Errors
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ID

CWE-56: Path Equivalence: 'filedir*' (Wildcard)

Weakness ID: 56
Abstraction: Variant
Status: Incomplete
Presentation Filter:
+ Description

Description Summary

A software system that accepts path input in the form of asterisk wildcard ('filedir*') without appropriate validation can lead to ambiguous path resolution and allow an attacker to traverse the file system to unintended locations or access arbitrary files.
+ Time of Introduction
  • Implementation
+ Applicable Platforms

Languages

All

+ Common Consequences
ScopeEffect
Confidentiality
Integrity

Technical Impact: Read files or directories; Modify files or directories

+ Observed Examples
ReferenceDescription
List directories using desired path and "*"
List files in web server using "*.ext"
+ Potential Mitigations

Phase: Implementation

Strategy: Input Validation

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 whitelist validation schemes by introducing dangerous inputs after they have been checked.

+ Relationships
NatureTypeIDNameView(s) this relationship pertains toView(s)
ChildOfWeakness BaseWeakness Base41Improper Resolution of Path Equivalence
Development Concepts (primary)699
Research Concepts (primary)1000
ChildOfWeakness VariantWeakness Variant155Improper Neutralization of Wildcards or Matching Symbols
Research Concepts1000
ChildOfCategoryCategory981SFP Secondary Cluster: Path Traversal
Software Fault Pattern (SFP) Clusters (primary)888
+ Taxonomy Mappings
Mapped Taxonomy NameNode IDFitMapped Node Name
PLOVERfiledir* (asterisk / wildcard)
Software Fault PatternsSFP16Path Traversal
+ Content History
Submissions
Submission DateSubmitterOrganizationSource
PLOVERExternally Mined
Modifications
Modification DateModifierOrganizationSource
2008-07-01Eric DalciCigitalExternal
updated Time_of_Introduction
2008-09-08CWE Content TeamMITREInternal
updated Relationships, Taxonomy_Mappings
2011-06-01CWE Content TeamMITREInternal
updated Common_Consequences
2012-05-11CWE Content TeamMITREInternal
updated Relationships
2012-10-30CWE Content TeamMITREInternal
updated Potential_Mitigations
2014-07-30CWE Content TeamMITREInternal
updated Relationships, Taxonomy_Mappings
Previous Entry Names
Change DatePrevious Entry Name
2008-04-11Path Issue - Asterisk Wildcard - filedir*

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Page Last Updated: January 18, 2017