Common Weakness Enumeration

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CWE-430: Deployment of Wrong Handler

Weakness ID: 430
Abstraction: Base
Status: Incomplete
Presentation Filter:
+ Description

Description Summary

The wrong "handler" is assigned to process an object.

Extended Description

An example of deploying the wrong handler would be calling a servlet to reveal source code of a .JSP file, or automatically "determining" type of the object even if it is contradictory to an explicitly specified type.

+ Time of Introduction
  • Implementation
+ Applicable Platforms



+ Common Consequences

Technical Impact: Varies by context; Unexpected state

+ Observed Examples
Source code disclosure via manipulated file extension that causes parsing by wrong DLL.
Web browser does not properly handle the Content-Type header field, causing a different application to process the document.
Source code disclosure by directly invoking a servlet.
Arbitrary Perl functions can be loaded by calling a non-existent function that activates a handler.
+ Potential Mitigations

Phase: Architecture and Design

Perform a type check before interpreting an object.

Phase: Architecture and Design

Reject any inconsistent types, such as a file with a .GIF extension that appears to consist of PHP code.

+ Weakness Ordinalities

This weakness is usually resultant from other weaknesses.

+ Relationships
NatureTypeIDNameView(s) this relationship pertains toView(s)
ChildOfCategoryCategory429Handler Errors
Development Concepts (primary)699
ChildOfWeakness ClassWeakness Class691Insufficient Control Flow Management
Research Concepts (primary)1000
ChildOfCategoryCategory977SFP Secondary Cluster: Design
Software Fault Pattern (SFP) Clusters (primary)888
CanPrecedeWeakness VariantWeakness Variant433Unparsed Raw Web Content Delivery
Research Concepts1000
PeerOfWeakness BaseWeakness Base434Unrestricted Upload of File with Dangerous Type
Research Concepts1000
+ Taxonomy Mappings
Mapped Taxonomy NameNode IDFitMapped Node Name
PLOVERImproper Handler Deployment
+ References
[REF-7] Mark Dowd, John McDonald and Justin Schuh. "The Art of Software Security Assessment". Chapter 3, "File Handlers", Page 74.. 1st Edition. Addison Wesley. 2006.
+ Content History
Submission DateSubmitterOrganizationSource
PLOVERExternally Mined
Modification DateModifierOrganizationSource
2008-07-01Eric DalciCigitalExternal
updated Potential_Mitigations, Time_of_Introduction
2008-09-08CWE Content TeamMITREInternal
updated Relationships, Other_Notes, Taxonomy_Mappings
2008-10-14CWE Content TeamMITREInternal
updated Description
2009-10-29CWE Content TeamMITREInternal
updated Other_Notes, Weakness_Ordinalities
2011-06-01CWE Content TeamMITREInternal
updated Common_Consequences
2011-06-27CWE Content TeamMITREInternal
updated Common_Consequences
2012-05-11CWE Content TeamMITREInternal
updated References, Relationships
2012-10-30CWE Content TeamMITREInternal
updated Potential_Mitigations
2014-07-30CWE Content TeamMITREInternal
updated Relationships
Previous Entry Names
Change DatePrevious Entry Name
2008-04-11Improper Handler Deployment

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Page Last Updated: May 05, 2017