void drop_privileges(char *username) {
	struct passwd *user = (struct passwd *) getpwnam(username);
	if (user == NULL) {
		fprintf(stderr, _("Failed dropping privileges. The user %s is not a valid username on local system.\n"), username);
		exit(1);
	}
	if (getuid() == 0) {
		/* process is running as root, drop privileges */
		if (setgid(user->pw_gid) != 0) {
			fprintf(stderr, _("setgid: Error dropping group privileges\n"));
			exit(1);
		}
		if (setuid(user->pw_uid) != 0) {
			fprintf(stderr, _("setuid: Error dropping user privileges\n"));
			exit(1);
		}
		/* Verify if the privileges were developed. */
		if (setuid(0) != -1) {
			fprintf(stderr, _("Failed to drop privileges\n"));
			exit(1);
		}
	}
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.