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04_path_rule.tf
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04_path_rule.tf
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# Regional
####################
## OWASP Top 10 A4
### Path Traversal, LFI, RFI
### Matches request patterns designed to traverse filesystem paths, and include local or remote files
resource "aws_wafregional_byte_match_set" "owasp_04_paths_string_set" {
count = lower(var.target_scope) == "regional" ? 1 : 0
name = "${lower(var.waf_prefix)}-owasp-04-match-rfi-lfi-traversal-${random_id.this.0.hex}"
dynamic "byte_match_tuples" {
for_each = var.disable_04_uri_contains_previous_dir_after_url_decode ? [] : [1]
content {
text_transformation = "URL_DECODE"
target_string = "../"
positional_constraint = "CONTAINS"
field_to_match {
type = "URI"
}
}
}
dynamic "byte_match_tuples" {
for_each = var.disable_04_uri_contains_previous_dir_after_html_decode ? [] : [1]
content {
text_transformation = "HTML_ENTITY_DECODE"
target_string = "../"
positional_constraint = "CONTAINS"
field_to_match {
type = "URI"
}
}
}
dynamic "byte_match_tuples" {
for_each = var.disable_04_query_string_contains_previous_dir_after_url_decode ? [] : [1]
content {
text_transformation = "URL_DECODE"
target_string = "../"
positional_constraint = "CONTAINS"
field_to_match {
type = "QUERY_STRING"
}
}
}
dynamic "byte_match_tuples" {
for_each = var.disable_04_query_string_contains_previous_dir_after_html_decode ? [] : [1]
content {
text_transformation = "HTML_ENTITY_DECODE"
target_string = "../"
positional_constraint = "CONTAINS"
field_to_match {
type = "QUERY_STRING"
}
}
}
dynamic "byte_match_tuples" {
for_each = var.disable_04_uri_contains_url_path_after_url_decode ? [] : [1]
content {
text_transformation = "URL_DECODE"
target_string = "://"
positional_constraint = "CONTAINS"
field_to_match {
type = "URI"
}
}
}
dynamic "byte_match_tuples" {
for_each = var.disable_04_uri_contains_url_path_after_html_decode ? [] : [1]
content {
text_transformation = "HTML_ENTITY_DECODE"
target_string = "://"
positional_constraint = "CONTAINS"
field_to_match {
type = "URI"
}
}
}
dynamic "byte_match_tuples" {
for_each = var.disable_04_query_string_contains_url_path_after_url_decode ? [] : [1]
content {
text_transformation = "URL_DECODE"
target_string = "://"
positional_constraint = "CONTAINS"
field_to_match {
type = "QUERY_STRING"
}
}
}
dynamic "byte_match_tuples" {
for_each = var.disable_04_query_string_contains_url_path_after_html_decode ? [] : [1]
content {
text_transformation = "HTML_ENTITY_DECODE"
target_string = "://"
positional_constraint = "CONTAINS"
field_to_match {
type = "QUERY_STRING"
}
}
}
}
resource "aws_wafregional_rule" "owasp_04_paths_rule" {
depends_on = [aws_wafregional_byte_match_set.owasp_04_paths_string_set, aws_wafregional_byte_match_set.url_whitelist_string_set]
count = lower(var.target_scope) == "regional" ? 1 : 0
name = "${lower(var.waf_prefix)}-owasp-04-detect-rfi-lfi-traversal-${random_id.this.0.hex}"
metric_name = "${lower(var.waf_prefix)}OWASP04DetectRFILFITraversal${random_id.this.0.hex}"
predicate {
data_id = aws_wafregional_byte_match_set.owasp_04_paths_string_set.0.id
negated = "false"
type = "ByteMatch"
}
predicate {
data_id = aws_wafregional_byte_match_set.url_whitelist_string_set.0.id
negated = "true"
type = "ByteMatch"
}
}
# Global
####################
## OWASP Top 10 A4
### Path Traversal, LFI, RFI
### Matches request patterns designed to traverse filesystem paths, and include local or remote files
resource "aws_waf_byte_match_set" "owasp_04_paths_string_set" {
count = lower(var.target_scope) == "global" ? 1 : 0
name = "${lower(var.waf_prefix)}-owasp-04-match-rfi-lfi-traversal-${random_id.this.0.hex}"
dynamic "byte_match_tuples" {
for_each = var.disable_04_uri_contains_previous_dir_after_url_decode ? [] : [1]
content {
text_transformation = "URL_DECODE"
target_string = "../"
positional_constraint = "CONTAINS"
field_to_match {
type = "URI"
}
}
}
dynamic "byte_match_tuples" {
for_each = var.disable_04_uri_contains_previous_dir_after_html_decode ? [] : [1]
content {
text_transformation = "HTML_ENTITY_DECODE"
target_string = "../"
positional_constraint = "CONTAINS"
field_to_match {
type = "URI"
}
}
}
dynamic "byte_match_tuples" {
for_each = var.disable_04_query_string_contains_previous_dir_after_url_decode ? [] : [1]
content {
text_transformation = "URL_DECODE"
target_string = "../"
positional_constraint = "CONTAINS"
field_to_match {
type = "QUERY_STRING"
}
}
}
dynamic "byte_match_tuples" {
for_each = var.disable_04_query_string_contains_previous_dir_after_html_decode ? [] : [1]
content {
text_transformation = "HTML_ENTITY_DECODE"
target_string = "../"
positional_constraint = "CONTAINS"
field_to_match {
type = "QUERY_STRING"
}
}
}
dynamic "byte_match_tuples" {
for_each = var.disable_04_uri_contains_url_path_after_url_decode ? [] : [1]
content {
text_transformation = "URL_DECODE"
target_string = "://"
positional_constraint = "CONTAINS"
field_to_match {
type = "URI"
}
}
}
dynamic "byte_match_tuples" {
for_each = var.disable_04_uri_contains_url_path_after_html_decode ? [] : [1]
content {
text_transformation = "HTML_ENTITY_DECODE"
target_string = "://"
positional_constraint = "CONTAINS"
field_to_match {
type = "URI"
}
}
}
dynamic "byte_match_tuples" {
for_each = var.disable_04_query_string_contains_url_path_after_url_decode ? [] : [1]
content {
text_transformation = "URL_DECODE"
target_string = "://"
positional_constraint = "CONTAINS"
field_to_match {
type = "QUERY_STRING"
}
}
}
dynamic "byte_match_tuples" {
for_each = var.disable_04_query_string_contains_url_path_after_html_decode ? [] : [1]
content {
text_transformation = "HTML_ENTITY_DECODE"
target_string = "://"
positional_constraint = "CONTAINS"
field_to_match {
type = "QUERY_STRING"
}
}
}
}
resource "aws_waf_rule" "owasp_04_paths_rule" {
depends_on = [aws_waf_byte_match_set.owasp_04_paths_string_set]
count = lower(var.target_scope) == "global" ? 1 : 0
name = "${lower(var.waf_prefix)}-owasp-04-detect-rfi-lfi-traversal-${random_id.this.0.hex}"
metric_name = "${lower(var.waf_prefix)}OWASP04DetectRFILFITraversal${random_id.this.0.hex}"
predicates {
data_id = aws_waf_byte_match_set.owasp_04_paths_string_set.0.id
negated = "false"
type = "ByteMatch"
}
}