Insecure authentication method - Basic
Description
The server uses Basic authentication over an insecure channel.
Impact
Gather base 64 coded credentials.
Recommendation
Use stronger authentication mechanisms like Bearer and OAuth.
Threat
Unauthorized attacker from adjacent network performing a Sniffing attack.
Expected Remediation Time
⌚ 120 minutes.
Score
Default score using CVSS 3.1. It may change depending on the context of the vulnerability.
Base
- Attack vector: A
- Attack complexity: L
- Privileges required: N
- User interaction: N
- Scope: U
- Confidentiality: L
- Integrity: N
- Availability: N
Temporal
- Exploit code madurity: P
- Remediation level: O
- Report confidence: C
Result
- Vector string: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C
- Score:
- Base: 4.3
- Temporal: 3.9
- Severity:
- Base: Medium
- Temporal: Low
Code Examples
Compliant code
Implement a SSH key authentication for the sensitive resource
resource "azurerm_linux_virtual_machine" "not_vulnerable" {
name = "example-machine"
size = "Standard_F2"
admin_username = "adminuser"
admin_ssh_key {
username = "adminuser"
public_key = file("~/.ssh/id_rsa.pub")
}
}
resource "azurerm_virtual_machine" "not_vulnerable" {
name = "${var.prefix}-vm"
location = azurerm_resource_group.main.location
resource_group_name = azurerm_resource_group.main.name
network_interface_ids = [azurerm_network_interface.main.id]
vm_size = "Standard_DS1_v2"
os_profile_linux_config {
disable_password_authentication = false
ssh_keys = ["${var.ssh_keys}"]
}
}
Non compliant code
Examples with virtual machines without strong auth mechanism defined
resource "azurerm_linux_virtual_machine" "vulnerable" {
name = "example-machine"
size = "Standard_F2"
admin_username = "adminuser"
}
resource "azurerm_virtual_machine" "vulnerable" {
name = "${var.prefix}-vm"
location = azurerm_resource_group.main.location
resource_group_name = azurerm_resource_group.main.name
network_interface_ids = [azurerm_network_interface.main.id]
vm_size = "Standard_DS1_v2"
os_profile_linux_config {
disable_password_authentication = false
}
}
Requirements
- 030. Avoid object reutilization
- 228. Authenticate using standard protocols
- 319. Make authentication options equally secure
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