IO.TAINT.CONF : Tainted Configuration Setting

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A potentially-tainted value is used to construct a configuration setting.

Class Name

Tainted Configuration Setting

Significance

security

Mnemonic

IO.TAINT.CONF

Categories

MisraC2023	MisraC2023:D.4.14	The validity of values received from external sources shall be checked
Misra2012	Misra2012:D.4.14	The validity of values received from external sources shall be checked
AUTOSARC++14	AUTOSARC++14:A27-0-1	Inputs from independent components shall be validated.
CWE	CWE:15	External Control of System or Configuration Setting
DISA-6r1	DISA-6r1:V-222606	The application must validate all input.
	DISA-6r1:V-222609	The application must not be subject to input handling vulnerabilities.
DISA-5r3	DISA-5r3:V-70265	The application must validate all input.
	DISA-5r3:V-70271	The application must not be subject to input handling vulnerabilities.
DISA-4r3	DISA-4r3:V-70265	The application must validate all input.
	DISA-4r3:V-70271	The application must not be subject to input handling vulnerabilities.
DISA-3r10	DISA-3r10:V-6164	The designer will ensure the application validates all input.

Availability

Available for C and C++.

Enabling

Checks for this warning class are disabled by default. To enable them, add the following WARNING_FILTER rule to the project configuration file.

WARNING_FILTER += allow class="Tainted Configuration Setting"

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

/* sethostid() is not present in all versions of unistd.h.
 * When present, it is only available to the superuser.
 */
int sethostid(long hostid);

int set_specified_hostid(FILE *f){
    char hostid[16];

    if (fgets(hostid, 16, f) == NULL ) return -1;
    return sethostid(atol(hostid)); /* 'Tainted Configuration Setting' warning issued here */
}

CodeSonar ships with library models that allow it to recognize functions such as libc sethostid() and Win32 sethostid() that use one or more of their parameters to construct a configuration setting. If one of these functions is called with a potentially-tainted value in one of those parameter positions, a warning will be issued.

If you have created a custom library model for some function f() in terms of one of these existing models, calls to f() will also be capable of triggering Tainted Configuration Setting warnings.

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

IO.TAINT.CONF : Tainted Configuration Setting

Summary

Properties

Example

Triggers

Relevant Configuration File Parameters