def find_rules_for_cve(api, configuration, api_version, api_exception, cve_id):
    """ Finds the intrusion prevention rules for a CVE.

    :param api: The Deep Security API modules.
    :param configuration: Configuration object to pass to the api client.
    :param api_version: The version of the API to use.
    :param api_exception: The Deep Security API exception module.
    :param cve_id: The ID of the CVE.
    :return: The intrusion prevention rule ID, or None if no rule is found.
    """

    rule_id_s = []

    # Set search criteria
    search_criteria = api.SearchCriteria()
    search_criteria.field_name = "CVE"
    search_criteria.string_value = "%" + cve_id + "%"
    search_criteria.string_test = "equal"

    # Create a search filter
    search_filter = api.SearchFilter()
    search_filter.search_criteria = [search_criteria]

    try:
        # Search for all intrusion prevention rules for the CVE
        ip_rules_api = api.IntrusionPreventionRulesApi(api.ApiClient(configuration))
        ip_rules_search_results = ip_rules_api.search_intrusion_prevention_rules(api_version, search_filter=search_filter)

        # Get the intrusion prevention rule IDs for the CVE from the results
        for rule in ip_rules_search_results.intrusion_prevention_rules:
            rule_id_s.append(rule.id)

        return rule_id_s

    except api_exception as e:
        return "Exception: " + str(e)