COMMON WEAKNESS ENUMERATIONDraft

CWE-481

Assigning instead of Comparing

The code uses an operator for assignment when the intention was to perform a comparison.

Soyutlama

Variant

Yapı

Simple

Sömürü İhtimali

Low

Problemi anla

Problem nedir?

The code uses an operator for assignment when the intention was to perform a comparison.

Genişletilmiş açıklama

In many languages the compare statement is very close in appearance to the assignment statement and are often confused. This bug is generally the result of a typo and usually causes obvious problems with program execution. If the comparison is in an if statement, the if statement will usually evaluate the value of the right-hand side of the predicate.

Kök neden

Problem nasıl ve ne zaman oluşur?

Yaşam döngüsü evresi

Implementation

Risk

Başarılı sömürü neye yol açar?

Alter Execution Logic

Etkilenen güvenlik alanları: Other

Savunma

Nasıl önlenir ve çözülür?

Implementation

Uygulama aşaması savunması

Detay
Place constants on the left. If one attempts to assign a constant with a variable, the compiler will produce an error.

Doğrulama

Nasıl tespit edilir?

Automated Static Analysis

High
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.)

Automated Static Analysis - Source Code

An Integrated Development Environment (IDE) or linter can report or highlight this weaknesses.