Network Security Group With Unrestricted Access To SSH
- Query id: 2ade1579-4b2c-4590-bebb-f99bf597f612
- Query name: Network Security Group With Unrestricted Access To SSH
- Platform: AzureResourceManager
- Severity: High
- Category: Networking and Firewall
- URL: Github
Description¶
Port 22 (SSH) is exposed to the Internet
Documentation
Code samples¶
Code samples with security vulnerabilities¶
Positive test num. 1 - json file
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "2.0.0.0",
"apiProfile": "2019-03-01-hybrid",
"parameters": {},
"variables": {},
"functions": [],
"resources": [
{
"name": "security group",
"type": "Microsoft.Network/networkSecurityGroups",
"apiVersion": "2020-11-01",
"location": "location1",
"tags": {},
"properties": {
"securityRules": [
{
"id": "id",
"properties": {
"description": "access to SSH",
"protocol": "Tcp",
"sourcePortRange": "*",
"destinationPortRange": "22",
"sourceAddressPrefix": "*",
"destinationAddressPrefix": "*",
"access": "Allow",
"priority": 301,
"direction": "Inbound"
},
"name": "security rule"
},
{
"id": "id2",
"properties": {
"description": "access to RDP",
"protocol": "Tcp",
"sourcePortRange": "*",
"destinationPortRange": "3389",
"sourceAddressPrefix": "*",
"destinationAddressPrefix": "*",
"access": "Deny",
"priority": 301,
"direction": "Inbound"
},
"name": "security rule2"
}
]
},
"resources": []
}
],
"outputs": {}
}
Positive test num. 2 - json file
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "2.0.0.0",
"apiProfile": "2019-03-01-hybrid",
"parameters": {},
"variables": {},
"functions": [],
"resources": [
{
"name": "sample/securitygroup",
"type": "Microsoft.Network/networkSecurityGroups/securityRules",
"apiVersion": "2020-11-01",
"properties": {
"description": "access to SSH",
"protocol": "Tcp",
"sourcePortRange": "*",
"destinationPortRanges": [
"22-23"
],
"sourceAddressPrefix": "*",
"destinationAddressPrefix": "*",
"access": "Allow",
"priority": 100,
"direction": "Inbound"
}
}
],
"outputs": {}
}
Positive test num. 3 - json file
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "2.0.0.0",
"apiProfile": "2019-03-01-hybrid",
"parameters": {},
"variables": {},
"functions": [],
"resources": [
{
"name": "securitygroup",
"type": "Microsoft.Network/networkSecurityGroups",
"apiVersion": "2020-11-01",
"location": "location1",
"tags": {},
"properties": {},
"resources": [
{
"type": "securityRules",
"apiVersion": "2020-11-01",
"properties": {
"description": "access to SSH",
"protocol": "Tcp",
"sourcePortRange": "*",
"destinationPortRanges": [
"22-23"
],
"sourceAddressPrefix": "*",
"destinationAddressPrefix": "*",
"access": "Allow",
"priority": 100,
"direction": "Inbound"
},
"name": "sr"
}
]
}
],
"outputs": {}
}
Positive test num. 4 - json file
{
"properties": {
"template": {
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "2.0.0.0",
"apiProfile": "2019-03-01-hybrid",
"parameters": {},
"variables": {},
"functions": [],
"resources": [
{
"name": "security group",
"type": "Microsoft.Network/networkSecurityGroups",
"apiVersion": "2020-11-01",
"location": "location1",
"tags": {},
"properties": {
"securityRules": [
{
"id": "id",
"properties": {
"description": "access to SSH",
"protocol": "Tcp",
"sourcePortRange": "*",
"destinationPortRange": "22",
"sourceAddressPrefix": "*",
"destinationAddressPrefix": "*",
"access": "Allow",
"priority": 301,
"direction": "Inbound"
},
"name": "security rule"
}
]
},
"resources": []
}
],
"outputs": {}
},
"parameters": {}
},
"kind": "template",
"type": "Microsoft.Blueprint/blueprints/artifacts",
"name": "myTemplate"
}
Positive test num. 5 - json file
{
"properties": {
"template": {
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "2.0.0.0",
"apiProfile": "2019-03-01-hybrid",
"parameters": {},
"variables": {},
"functions": [],
"resources": [
{
"name": "sample/securitygroup",
"type": "Microsoft.Network/networkSecurityGroups/securityRules",
"apiVersion": "2020-11-01",
"properties": {
"description": "access to SSH",
"protocol": "Tcp",
"sourcePortRange": "*",
"destinationPortRanges": [
"22-23"
],
"sourceAddressPrefix": "*",
"destinationAddressPrefix": "*",
"access": "Allow",
"priority": 100,
"direction": "Inbound"
}
}
],
"outputs": {}
},
"parameters": {}
},
"kind": "template",
"type": "Microsoft.Blueprint/blueprints/artifacts",
"name": "myTemplate"
}
Positive test num. 6 - json file
{
"properties": {
"template": {
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "2.0.0.0",
"apiProfile": "2019-03-01-hybrid",
"parameters": {},
"variables": {},
"functions": [],
"resources": [
{
"name": "securitygroup",
"type": "Microsoft.Network/networkSecurityGroups",
"apiVersion": "2020-11-01",
"location": "location1",
"tags": {},
"properties": {},
"resources": [
{
"type": "securityRules",
"apiVersion": "2020-11-01",
"properties": {
"description": "access to SSH",
"protocol": "Tcp",
"sourcePortRange": "*",
"destinationPortRanges": [
"22-23"
],
"sourceAddressPrefix": "*",
"destinationAddressPrefix": "*",
"access": "Allow",
"priority": 100,
"direction": "Inbound"
},
"name": "sr"
}
]
}
],
"outputs": {}
},
"parameters": {}
},
"kind": "template",
"type": "Microsoft.Blueprint/blueprints/artifacts",
"name": "myTemplate"
}
Code samples without security vulnerabilities¶
Negative test num. 1 - json file
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "2.0.0.0",
"apiProfile": "2019-03-01-hybrid",
"parameters": {},
"variables": {},
"functions": [],
"resources": [
{
"name": "security group",
"type": "Microsoft.Network/networkSecurityGroups",
"apiVersion": "2020-11-01",
"location": "location1",
"tags": {},
"properties": {
"securityRules": [
{
"id": "id",
"properties": {
"description": "access to SSH",
"protocol": "Tcp",
"sourcePortRange": "*",
"destinationPortRange": "22",
"sourceAddressPrefix": "*",
"destinationAddressPrefix": "*",
"access": "Deny",
"priority": 301,
"direction": "Inbound"
},
"name": "security rule"
}
]
},
"resources": []
}
],
"outputs": {}
}
Negative test num. 2 - json file
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "2.0.0.0",
"apiProfile": "2019-03-01-hybrid",
"parameters": {},
"variables": {},
"functions": [],
"resources": [
{
"name": "sample/securitygroup",
"type": "Microsoft.Network/networkSecurityGroups/securityRules",
"apiVersion": "2020-11-01",
"properties": {
"description": "access",
"protocol": "Tcp",
"sourcePortRange": "*",
"destinationPortRanges": [
"4030-5100"
],
"sourceAddressPrefix": "*",
"destinationAddressPrefix": "*",
"access": "Allow",
"priority": 100,
"direction": "Inbound"
}
}
],
"outputs": {}
}
Negative test num. 3 - json file
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "2.0.0.0",
"apiProfile": "2019-03-01-hybrid",
"parameters": {},
"variables": {},
"functions": [],
"resources": [
{
"name": "securitygroup",
"type": "Microsoft.Network/networkSecurityGroups",
"apiVersion": "2020-11-01",
"location": "location1",
"tags": {},
"properties": {},
"resources": [
{
"type": "securityRules",
"apiVersion": "2020-11-01",
"properties": {
"description": "access",
"protocol": "Tcp",
"sourcePortRange": "*",
"destinationPortRanges": [
"6634"
],
"sourceAddressPrefix": "*",
"destinationAddressPrefix": "*",
"access": "Allow",
"priority": 100,
"direction": "Inbound"
},
"name": "sr"
}
]
}
],
"outputs": {}
}
Negative test num. 4 - json file
{
"properties": {
"template": {
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "2.0.0.0",
"apiProfile": "2019-03-01-hybrid",
"parameters": {},
"variables": {},
"functions": [],
"resources": [
{
"name": "security group",
"type": "Microsoft.Network/networkSecurityGroups",
"apiVersion": "2020-11-01",
"location": "location1",
"tags": {},
"properties": {
"securityRules": [
{
"id": "id",
"properties": {
"description": "access to SSH",
"protocol": "Tcp",
"sourcePortRange": "*",
"destinationPortRange": "22",
"sourceAddressPrefix": "*",
"destinationAddressPrefix": "*",
"access": "Deny",
"priority": 301,
"direction": "Inbound"
},
"name": "security rule"
}
]
},
"resources": []
}
],
"outputs": {}
},
"parameters": {}
},
"kind": "template",
"type": "Microsoft.Blueprint/blueprints/artifacts",
"name": "myTemplate"
}
Negative test num. 5 - json file
{
"properties": {
"template": {
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "2.0.0.0",
"apiProfile": "2019-03-01-hybrid",
"parameters": {},
"variables": {},
"functions": [],
"resources": [
{
"name": "sample/securitygroup",
"type": "Microsoft.Network/networkSecurityGroups/securityRules",
"apiVersion": "2020-11-01",
"properties": {
"description": "access",
"protocol": "Tcp",
"sourcePortRange": "*",
"destinationPortRanges": [
"4030-5100"
],
"sourceAddressPrefix": "*",
"destinationAddressPrefix": "*",
"access": "Allow",
"priority": 100,
"direction": "Inbound"
}
}
],
"outputs": {}
},
"parameters": {}
},
"kind": "template",
"type": "Microsoft.Blueprint/blueprints/artifacts",
"name": "myTemplate"
}
Negative test num. 6 - json file
{
"properties": {
"template": {
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "2.0.0.0",
"apiProfile": "2019-03-01-hybrid",
"parameters": {},
"variables": {},
"functions": [],
"resources": [
{
"name": "securitygroup",
"type": "Microsoft.Network/networkSecurityGroups",
"apiVersion": "2020-11-01",
"location": "location1",
"tags": {},
"properties": {},
"resources": [
{
"type": "securityRules",
"apiVersion": "2020-11-01",
"properties": {
"description": "access",
"protocol": "Tcp",
"sourcePortRange": "*",
"destinationPortRanges": [
"6634"
],
"sourceAddressPrefix": "*",
"destinationAddressPrefix": "*",
"access": "Allow",
"priority": 100,
"direction": "Inbound"
},
"name": "sr"
}
]
}
],
"outputs": {}
},
"parameters": {}
},
"kind": "template",
"type": "Microsoft.Blueprint/blueprints/artifacts",
"name": "myTemplate"
}