CWE-843 Detail

CWE-843

Access of Resource Using Incompatible Type ('Type Confusion')
Incomplete
2011-06-01
00h00 +00:00
2025-12-11
00h00 +00:00
CWE Mitre.org
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Naam: Access of Resource Using Incompatible Type ('Type Confusion')

The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.

Algemene informatie

Introductiemodi

Implementation

Toepasselijke platforms

Taal

Name: C (Undetermined)
Name: C++ (Undetermined)

Veelvoorkomende gevolgen

Bereik Impact Waarschijnlijkheid
Availability
Integrity
Confidentiality		Read Memory, Modify Memory, Execute Unauthorized Code or Commands, DoS: Crash, Exit, or Restart

Note: When a memory buffer is accessed using the wrong type, it could read or write memory out of the bounds of the buffer, if the allocated buffer is smaller than the type that the code is attempting to access, leading to a crash and possibly code execution.

Waargenomen voorbeelden

Referenties Beschrijving

CVE-2025-32352

Type confusion in PHP app allows authentication bypass when users have passwords whose MD5 hashes can be interpreted as numbers

CVE-2010-4577

Type confusion in CSS sequence leads to out-of-bounds read.

CVE-2011-0611

Size inconsistency allows code execution, first discovered when it was actively exploited in-the-wild.

CVE-2010-0258

Improperly-parsed file containing records of different types leads to code execution when a memory location is interpreted as a different object than intended.

Detectiemethoden

Automated Static Analysis

Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.)
Effectiviteit : High

Notities kwetsbaarheidsmapping

Rechtvaardiging : 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.
Opmerking : 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.

Notities



Referenties

REF-811

Attacking Interoperability
Mark Dowd, Ryan Smith, David Dewey.
http://hustlelabs.com/stuff/bh2009_dowd_smith_dewey.pdf

REF-62

The Art of Software Security Assessment
Mark Dowd, John McDonald, Justin Schuh.

Indiening

Naam Organisatie Datum Releasedatum Version
CWE Content Team MITRE 2011-05-15 +00:00 2011-06-01 +00:00 1.13

Wijzigingen

Naam Organisatie Datum Opmerking
CWE Content Team MITRE 2012-05-11 +00:00 updated References
CWE Content Team MITRE 2017-11-08 +00:00 updated Applicable_Platforms, Taxonomy_Mappings
CWE Content Team MITRE 2019-01-03 +00:00 updated Relationships
CWE Content Team MITRE 2019-06-20 +00:00 updated Relationships
CWE Content Team MITRE 2020-02-24 +00:00 updated Relationships
CWE Content Team MITRE 2020-06-25 +00:00 updated Common_Consequences, Relationships
CWE Content Team MITRE 2022-04-28 +00:00 updated Research_Gaps
CWE Content Team MITRE 2023-01-31 +00:00 updated Description
CWE Content Team MITRE 2023-04-27 +00:00 updated References, Relationships
CWE Content Team MITRE 2023-06-29 +00:00 updated Mapping_Notes
CWE Content Team MITRE 2023-10-26 +00:00 updated Demonstrative_Examples
CWE Content Team MITRE 2025-12-11 +00:00 updated Detection_Factors, Observed_Examples, Weakness_Ordinalities
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