CWE-909 Detail

CWE-909

Missing Initialization of Resource
Gemiddeld
Incomplete
2013-02-21
00h00 +00:00
2025-12-11
00h00 +00:00
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Naam: Missing Initialization of Resource

The product does not initialize a critical resource.

CWE-beschrijving

Many resources require initialization before they can be properly used. If a resource is not initialized, it could contain unpredictable or expired data, or it could be initialized to defaults that are invalid. This can have security implications when the resource is expected to have certain properties or values.

Algemene informatie

Introductiemodi

Implementation

Toepasselijke platforms

Taal

Class: Not Language-Specific (Undetermined)

Veelvoorkomende gevolgen

Bereik Impact Waarschijnlijkheid
ConfidentialityRead Memory, Read Application Data

Note: When reusing a resource such as memory or a program variable, the original contents of that resource may not be cleared before it is sent to an untrusted party.
AvailabilityDoS: Crash, Exit, or Restart

Note: The uninitialized resource may contain values that cause program flow to change in ways that the programmer did not intend.

Waargenomen voorbeelden

Referenties Beschrijving

CVE-2020-20739

A variable that has its value set in a conditional statement is sometimes used when the conditional fails, sometimes causing data leakage

CVE-2005-1036

Chain: Bypass of access restrictions due to improper authorization (CWE-862) of a user results from an improperly initialized (CWE-909) I/O permission bitmap

Mogelijke risicobeperkingen

Phases : Implementation
Explicitly initialize the resource before use. If this is performed through an API function or standard procedure, follow all specified steps.
Phases : Implementation
Pay close attention to complex conditionals that affect initialization, since some branches might not perform the initialization.
Phases : Implementation
Avoid race conditions (CWE-362) during initialization routines.
Phases : Build and Compilation
Run or compile your product with settings that generate warnings about uninitialized variables or data.

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 a Class and might have Base-level children that would be more appropriate
Opmerking : Examine children of this entry to see if there is a better fit

Indiening

Naam Organisatie Datum Releasedatum Version
CWE Content Team MITRE 2012-12-21 +00:00 2013-02-21 +00:00 2.4

Wijzigingen

Naam Organisatie Datum Opmerking
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 2021-03-15 +00:00 updated Demonstrative_Examples, Observed_Examples
CWE Content Team MITRE 2023-01-31 +00:00 updated Description, Potential_Mitigations, Relationships
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 2023-10-26 +00:00 updated Mapping_Notes, Type
CWE Content Team MITRE 2025-12-11 +00:00 updated Detection_Factors