MISC.FMTTYPE : Format String Type Error

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CodeSonar^® 9.2p0

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CodeSecure Inc

MISC.FMTTYPE : Format String Type Error

Summary

The arguments passed to a printf-like function do not match the format string. Either the number of arguments is incorrect or the types of the arguments are incorrect.

Properties

CWE

CWE:628

Function Call with Incorrectly Specified Arguments

CWE:687

Function Call With Incorrectly Specified Argument Value

CWE:688

Function Call With Incorrect Variable or Reference as Argument

TS17961

TS17961:5.44-invfmtstr

Using invalid format strings

CERT-C

CERT-C:FIO47-C

Use valid format strings

Insecure design

Insecure Design

Example

#include <stdio.h>

void misc_fmttype(void){
    printf("%i", 5);                          /* ok: correct number and type of arguments */

    printf("%i", 5.5);       /* "Format String Type Error" warning issued here:
                              * format string specifies an integer but argument is a float. */

    printf("%i", "5");       /* "Format String Type Error" warning issued here:
                              * format string specifies an integer but argument is a string. */

    printf("%i%i", 5);       /* "Format String Type Error" warning issued here:
                              * format string specifies two arguments but there is only one. */

    printf("%i%i", 5, 5, 5); /* "Format String Type Error" warning issued here:
                              * format string specifies two arguments but there are three. */
}

Relevant Configuration File Parameters

The following configuration file parameters affect checks for this warning class.