SSL policy allows weak algorithms Affecting Compute Engine service in Google
CCSS (Common Configuration Scoring System) is a set of measures used to determine the severity of the rule.
Each rule is associated with a high-level category. For example IAM, Container, Monitoring, Logging, Network, etc.
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Description
The TLS (Transport Layer Security) protocol secures transmission of data over the internet using standard encryption technology, and older versions (1.0, 1.1) may pose security risks. Note that the default SSL policy allows for these older versions, and we recommend that the minimum TLS version be set to 1.2.
How to fix?
Set profile to RESTRICTED, or to MODERN with min_tls_version set to TLS_1_2, or to CUSTOM with custom_features set to a valid SSL policy.
Invalid SSL policies:
TLS_RSA_WITH_AES_128_GCM_SHA256TLS_RSA_WITH_AES_256_GCM_SHA384TLS_RSA_WITH_AES_128_CBC_SHATLS_RSA_WITH_AES_256_CBC_SHATLS_RSA_WITH_3DES_EDE_CBC_SHA
Example configuration:
resource "google_compute_ssl_policy" "allowed" {
name = "production-ssl-policy"
profile = "MODERN"
min_tls_version = "TLS_1_2"
}
resource "google_compute_ssl_policy" "allowed_2" {
name = "production-ssl-policy"
profile = "RESTRICTED"
}
resource "google_compute_ssl_policy" "allowed_3" {
name = "production-ssl-policy-3"
profile = "CUSTOM"
custom_features = ["TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA"]
}