BADFUNC.SETUID : Use of setuid

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CodeSonar^® 9.2p0

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C and C++

Binaries

BADFUNC.SETUID : Use of setuid

Summary

A use of setuid(), which can cause problems in the presence of signals.

Properties

Class Name

Use of setuid

Significance

security

Mnemonic

BADFUNC.SETUID

Categories

CWE	CWE:676	Use of Potentially Dangerous Function
BSI	BSI:SIGNAL-02	Use of setuid
OWASP-2021	OWASP-2021:A4	Insecure design
OWASP-2025	OWASP-2025:A06	Insecure Design

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="Use of setuid"

To enable all BSI-related classes, including all BSI-specific BADFUNC classes, use the bsi configuration preset.

Resolution

When you see a Use of setuid warning, make sure that all signals have been disabled before setuid(root) executes. If so, you can change the warning state to Suppressed.

Relevant Configuration File Parameters

This class is implemented using a BAD_FUNCTION_* rule set in the general template configuration file.

To include an additional function or set of functions in the checks for this class, create a new set of BAD_FUNCTION_* rules in which the BAD_FUNCTION_REGEX setting matches the function or set of functions you want to check and the remaining rules match those in the other sets for this class.
To remove a function or set of functions from the checks for this class, edit the configuration file to comment out the corresponding set of BAD_FUNCTION_* rules.

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

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