BADFUNC.BO.REALPATH : Use of realpath

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A use of realpath(), which is vulnerable to buffer overflows.

Class Name

Use of realpath

Significance

security

Mnemonic

BADFUNC.BO.REALPATH

Categories

CWE	CWE:676	Use of Potentially Dangerous Function
	CWE:785	Use of Path Manipulation Function without Maximum-sized Buffer
DISA-6r1	DISA-6r1:V-222612	The application must not be vulnerable to overflow attacks.
DISA-5r3	DISA-5r3:V-70277	The application must not be vulnerable to overflow attacks.
DISA-4r3	DISA-4r3:V-70277	The application must not be vulnerable to overflow attacks.
DISA-3r10	DISA-3r10:V-6165	The designer will ensure the application does not have buffer overflows, use functions known to be vulnerable to buffer overflows, and does not use signed values for memory allocation where permitted by the programming language.
BSI	BSI:REALPATH	Use of realpath

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 realpath"

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

Do not use realpath().

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.

BADFUNC.BO.REALPATH : Use of realpath

Summary

Properties

Resolution

Relevant Configuration File Parameters