Difference between revisions of "Assigning instead of comparing"

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http://www.texttrocactrrosi.com  
 
http://www.texttrocactrrosi.com  
 
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Revision as of 10:59, 27 May 2009

http://www.texttrocactrrosi.com

This is a Vulnerability. To view all vulnerabilities, please see the Vulnerability Category page.



Last revision (mm/dd/yy): 05/27/2009

Vulnerabilities Table of Contents


Description

In many languages, the compare statement is very close in appearance to the assignment statement and are often confused.

This bug is generally a result of a typo and usually should cause obvious problems with program execution. If the comparison is in an if statement, the if statement will always return the value of the right-hand side variable.

Consequences

Unspecified.

Exposure period

  • Pre-design through Build: The use of tools to detect this problem is recommended.
  • Implementation: Many logic errors can lead to this condition. It can be exacerbated by lack, or misuse, of mitigating technologies.

Platform

  • Languages: C, C++
  • Operating platforms: Any

Required resources

Any

Severity

High

Likelihood of exploit

Low


Risk Factors

TBD


Examples

In C/C++/Java:

void called(int foo){
        if (foo=1)  printf("foo\n");
}

int main(){
        called(2);
        return 0;
}


Related Attacks

TBD

Related Vulnerabilities

Related Controls

TBD

  • Control 1
  • Control 2
  • Pre-design: Through Build: Many IDEs and static analysis products will detect this problem.
  • Implementation: Place constants on the left. If one attempts to assign a constant with a variable, the compiler will of course produce an error.


Related Technical Impacts

TBD


References

TBD