terraform.aws.security.aws-cloudfront-insecure-tls.aws-insecure-cloudfront-distribution-tls-version
semgrep
Author
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Detected an AWS CloudFront Distribution with an insecure TLS version. TLS versions less than 1.2 are considered insecure because they can be broken. To fix this, set your minimum_protocol_version
to "TLSv1.2_2018", "TLSv1.2_2019" or "TLSv1.2_2021"
.
Run Locally
Run in CI
Defintion
rules:
- id: aws-insecure-cloudfront-distribution-tls-version
patterns:
- pattern: |
resource "aws_cloudfront_distribution" $ANYTHING {
...
viewer_certificate {
...
}
...
}
- pattern-not-inside: |
resource "aws_cloudfront_distribution" $ANYTHING {
...
viewer_certificate {
...
minimum_protocol_version = "TLSv1.2_2018"
...
}
...
}
- pattern-not-inside: |
resource "aws_cloudfront_distribution" $ANYTHING {
...
viewer_certificate {
...
minimum_protocol_version = "TLSv1.2_2019"
...
}
...
}
- pattern-not-inside: |
resource "aws_cloudfront_distribution" $ANYTHING {
...
viewer_certificate {
...
minimum_protocol_version = "TLSv1.2_2021"
...
}
...
}
message: Detected an AWS CloudFront Distribution with an insecure TLS version.
TLS versions less than 1.2 are considered insecure because they can be
broken. To fix this, set your `minimum_protocol_version` to
`"TLSv1.2_2018", "TLSv1.2_2019" or "TLSv1.2_2021"`.
metadata:
category: security
technology:
- terraform
- aws
owasp:
- A03:2017 - Sensitive Data Exposure
- A02:2021 - Cryptographic Failures
cwe:
- "CWE-326: Inadequate Encryption Strength"
references:
- https://owasp.org/Top10/A02_2021-Cryptographic_Failures
subcategory:
- vuln
likelihood: MEDIUM
impact: MEDIUM
confidence: MEDIUM
license: Commons Clause License Condition v1.0[LGPL-2.1-only]
vulnerability_class:
- Cryptographic Issues
languages:
- hcl
severity: WARNING
Examples
aws-cloudfront-insecure-tls.tf
# ruleid: aws-insecure-cloudfront-distribution-tls-version
resource "aws_cloudfront_distribution" "fail" {
origin {
domain_name = aws_s3_bucket.b.bucket_regional_domain_name
origin_id = local.s3_origin_id
s3_origin_config {
origin_access_identity = "origin-access-identity/cloudfront/ABCDEFG1234567"
}
}
enabled = true
is_ipv6_enabled = true
comment = "Some comment"
default_root_object = "index.html"
logging_config {
include_cookies = false
bucket = "mylogs.s3.amazonaws.com"
prefix = "myprefix"
}
aliases = ["mysite.example.com", "yoursite.example.com"]
default_cache_behavior {
allowed_methods = ["DELETE", "GET", "HEAD", "OPTIONS", "PATCH", "POST", "PUT"]
cached_methods = ["GET", "HEAD"]
target_origin_id = local.s3_origin_id
forwarded_values {
query_string = false
cookies {
forward = "none"
}
}
viewer_protocol_policy = "allow-all"
min_ttl = 0
default_ttl = 3600
max_ttl = 86400
}
# Cache behavior with precedence 0
ordered_cache_behavior {
path_pattern = "/content/immutable/*"
allowed_methods = ["GET", "HEAD", "OPTIONS"]
cached_methods = ["GET", "HEAD", "OPTIONS"]
target_origin_id = local.s3_origin_id
forwarded_values {
query_string = false
headers = ["Origin"]
cookies {
forward = "none"
}
}
min_ttl = 0
default_ttl = 86400
max_ttl = 31536000
compress = true
viewer_protocol_policy = "redirect-to-https"
}
# Cache behavior with precedence 1
ordered_cache_behavior {
path_pattern = "/content/*"
allowed_methods = ["GET", "HEAD", "OPTIONS"]
cached_methods = ["GET", "HEAD"]
target_origin_id = local.s3_origin_id
forwarded_values {
query_string = false
cookies {
forward = "none"
}
}
min_ttl = 0
default_ttl = 3600
max_ttl = 86400
compress = true
viewer_protocol_policy = "redirect-to-https"
}
price_class = "PriceClass_200"
restrictions {
geo_restriction {
restriction_type = "whitelist"
locations = ["US", "CA", "GB", "DE"]
}
}
tags = {
Environment = "production"
}
viewer_certificate {
cloudfront_default_certificate = true
}
}
# ruleid: aws-insecure-cloudfront-distribution-tls-version
resource "aws_cloudfront_distribution" "fail2" {
origin {
domain_name = aws_s3_bucket.b.bucket_regional_domain_name
origin_id = local.s3_origin_id
s3_origin_config {
origin_access_identity = "origin-access-identity/cloudfront/ABCDEFG1234567"
}
}
enabled = true
is_ipv6_enabled = true
comment = "Some comment"
default_root_object = "index.html"
logging_config {
include_cookies = false
bucket = "mylogs.s3.amazonaws.com"
prefix = "myprefix"
}
aliases = ["mysite.example.com", "yoursite.example.com"]
default_cache_behavior {
allowed_methods = ["DELETE", "GET", "HEAD", "OPTIONS", "PATCH", "POST", "PUT"]
cached_methods = ["GET", "HEAD"]
target_origin_id = local.s3_origin_id
forwarded_values {
query_string = false
cookies {
forward = "none"
}
}
viewer_protocol_policy = "allow-all"
min_ttl = 0
default_ttl = 3600
max_ttl = 86400
}
# Cache behavior with precedence 0
ordered_cache_behavior {
path_pattern = "/content/immutable/*"
allowed_methods = ["GET", "HEAD", "OPTIONS"]
cached_methods = ["GET", "HEAD", "OPTIONS"]
target_origin_id = local.s3_origin_id
forwarded_values {
query_string = false
headers = ["Origin"]
cookies {
forward = "none"
}
}
min_ttl = 0
default_ttl = 86400
max_ttl = 31536000
compress = true
viewer_protocol_policy = "redirect-to-https"
}
# Cache behavior with precedence 1
ordered_cache_behavior {
path_pattern = "/content/*"
allowed_methods = ["GET", "HEAD", "OPTIONS"]
cached_methods = ["GET", "HEAD"]
target_origin_id = local.s3_origin_id
forwarded_values {
query_string = false
cookies {
forward = "none"
}
}
min_ttl = 0
default_ttl = 3600
max_ttl = 86400
compress = true
viewer_protocol_policy = "redirect-to-https"
}
price_class = "PriceClass_200"
restrictions {
geo_restriction {
restriction_type = "whitelist"
locations = ["US", "CA", "GB", "DE"]
}
}
tags = {
Environment = "production"
}
viewer_certificate {
cloudfront_default_certificate = false
minimum_protocol_version = "TLSv1"
}
}
# ruleid: aws-insecure-cloudfront-distribution-tls-version
resource "aws_cloudfront_distribution" "fail3" {
origin {
domain_name = aws_s3_bucket.b.bucket_regional_domain_name
origin_id = local.s3_origin_id
s3_origin_config {
origin_access_identity = "origin-access-identity/cloudfront/ABCDEFG1234567"
}
}
enabled = true
is_ipv6_enabled = true
comment = "Some comment"
default_root_object = "index.html"
logging_config {
include_cookies = false
bucket = "mylogs.s3.amazonaws.com"
prefix = "myprefix"
}
aliases = ["mysite.example.com", "yoursite.example.com"]
default_cache_behavior {
allowed_methods = ["DELETE", "GET", "HEAD", "OPTIONS", "PATCH", "POST", "PUT"]
cached_methods = ["GET", "HEAD"]
target_origin_id = local.s3_origin_id
forwarded_values {
query_string = false
cookies {
forward = "none"
}
}
viewer_protocol_policy = "allow-all"
min_ttl = 0
default_ttl = 3600
max_ttl = 86400
}
# Cache behavior with precedence 0
ordered_cache_behavior {
path_pattern = "/content/immutable/*"
allowed_methods = ["GET", "HEAD", "OPTIONS"]
cached_methods = ["GET", "HEAD", "OPTIONS"]
target_origin_id = local.s3_origin_id
forwarded_values {
query_string = false
headers = ["Origin"]
cookies {
forward = "none"
}
}
min_ttl = 0
default_ttl = 86400
max_ttl = 31536000
compress = true
viewer_protocol_policy = "redirect-to-https"
}
# Cache behavior with precedence 1
ordered_cache_behavior {
path_pattern = "/content/*"
allowed_methods = ["GET", "HEAD", "OPTIONS"]
cached_methods = ["GET", "HEAD"]
target_origin_id = local.s3_origin_id
forwarded_values {
query_string = false
cookies {
forward = "none"
}
}
min_ttl = 0
default_ttl = 3600
max_ttl = 86400
compress = true
viewer_protocol_policy = "redirect-to-https"
}
price_class = "PriceClass_200"
restrictions {
geo_restriction {
restriction_type = "whitelist"
locations = ["US", "CA", "GB", "DE"]
}
}
tags = {
Environment = "production"
}
viewer_certificate {
cloudfront_default_certificate = false
//not specified is a fail as defaults to TLSv1
//minimum_protocol_version = "TLSv1"
}
}
resource "aws_cloudfront_distribution" "pass" {
origin {
domain_name = aws_s3_bucket.b.bucket_regional_domain_name
origin_id = local.s3_origin_id
s3_origin_config {
origin_access_identity = "origin-access-identity/cloudfront/ABCDEFG1234567"
}
}
enabled = true
is_ipv6_enabled = true
comment = "Some comment"
default_root_object = "index.html"
logging_config {
include_cookies = false
bucket = "mylogs.s3.amazonaws.com"
prefix = "myprefix"
}
aliases = ["mysite.example.com", "yoursite.example.com"]
default_cache_behavior {
allowed_methods = ["DELETE", "GET", "HEAD", "OPTIONS", "PATCH", "POST", "PUT"]
cached_methods = ["GET", "HEAD"]
target_origin_id = local.s3_origin_id
forwarded_values {
query_string = false
cookies {
forward = "none"
}
}
viewer_protocol_policy = "allow-all"
min_ttl = 0
default_ttl = 3600
max_ttl = 86400
}
# Cache behavior with precedence 0
ordered_cache_behavior {
path_pattern = "/content/immutable/*"
allowed_methods = ["GET", "HEAD", "OPTIONS"]
cached_methods = ["GET", "HEAD", "OPTIONS"]
target_origin_id = local.s3_origin_id
forwarded_values {
query_string = false
headers = ["Origin"]
cookies {
forward = "none"
}
}
min_ttl = 0
default_ttl = 86400
max_ttl = 31536000
compress = true
viewer_protocol_policy = "redirect-to-https"
}
# Cache behavior with precedence 1
ordered_cache_behavior {
path_pattern = "/content/*"
allowed_methods = ["GET", "HEAD", "OPTIONS"]
cached_methods = ["GET", "HEAD"]
target_origin_id = local.s3_origin_id
forwarded_values {
query_string = false
cookies {
forward = "none"
}
}
min_ttl = 0
default_ttl = 3600
max_ttl = 86400
compress = true
viewer_protocol_policy = "redirect-to-https"
}
price_class = "PriceClass_200"
restrictions {
geo_restriction {
restriction_type = "whitelist"
locations = ["US", "CA", "GB", "DE"]
}
}
tags = {
Environment = "production"
}
viewer_certificate {
cloudfront_default_certificate = false
minimum_protocol_version = "TLSv1.2_2018"
}
}
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