AWS RDS Instance Minor Version Upgrades

Severity: low
Compliance: PCI 6.2
Tags: AWS, Panther, PCI
Reference: https://amzn.to/2L8POnD
Source: github.com/panther-labs/panther-analysis

If you want Amazon RDS to upgrade the DB engine version of a database automatically, you can enable auto minor version upgrades for the database.

Rule body yaml

AnalysisType: policy
Filename: aws_rds_instance_auto_minor_version_upgrade_enabled.py
PolicyID: "AWS.RDS.Instance.AutoMinorVersionUpgradeEnabled"
DisplayName: "AWS RDS Instance Minor Version Upgrades"
Enabled: true
ResourceTypes:
  - AWS.RDS.Instance
Tags:
  - AWS
  - Panther
  - PCI
Reports:
  PCI:
    - 6.2
Severity: Low
Description: >
  If you want Amazon RDS to upgrade the DB engine version of a database automatically,
  you can enable auto minor version upgrades for the database.
Runbook: |
  For major version upgrades, you must manually modify the DB engine version through the
  AWS Management Console, AWS CLI, or RDS API. For minor version upgrades,
  you can manually modify the engine version, or you can choose to enable auto minor version upgrades.
Reference: https://amzn.to/2L8POnD
Tests:
  - Name: Instance Auto Minor Version Upgrade Enabled
    ExpectedResult: true
    Resource:
      {
        "AllocatedStorage": 20,
        "AssociatedRoles": null,
        "AutoMinorVersionUpgrade": true,
        "AvailabilityZone": "us-west-2a",
        "BackupRetentionPeriod": 7,
        "CACertificateIdentifier": "rds-ca-2015",
        "CharacterSetName": null,
        "CopyTagsToSnapshot": false,
        "DBClusterIdentifier": null,
        "DBInstanceArn": "arn:aws:rds:us-west-2:123456789012:db:example-instance",
        "DBInstanceClass": "db.m4.xlarge",
        "DBInstanceIdentifier": "example-instance",
        "DBInstanceStatus": "available",
        "DBName": "db_1",
        "DBParameterGroups":
          [
            {
              "DBParameterGroupName": "default.mysql5.7",
              "ParameterApplyStatus": "in-sync",
            },
          ],
        "DBSecurityGroups": null,
        "DBSubnetGroup":
          {
            "DBSubnetGroupArn": null,
            "DBSubnetGroupDescription": "default",
            "DBSubnetGroupName": "default",
            "SubnetGroupStatus": "Complete",
            "Subnets":
              [
                {
                  "SubnetAvailabilityZone": { "Name": "us-west-2b" },
                  "SubnetIdentifier": "subnet-111222333",
                  "SubnetStatus": "Active",
                },
                {
                  "SubnetAvailabilityZone": { "Name": "us-west-2d" },
                  "SubnetIdentifier": "subnet-444555666",
                  "SubnetStatus": "Active",
                },
              ],
            "VpcId": "vpc-111222333",
          },
        "DbInstancePort": 0,
        "DbiResourceId": "db-ABCDEFGHIJKLMNOP",
        "DeletionProtection": false,
        "DomainMemberships": null,
        "EnabledCloudwatchLogsExports": null,
        "Endpoint":
          {
            "Address": "example-instance.abcdefghijkl.us-west-2.rds.amazonaws.com",
            "HostedZoneId": "ABCDEF1234",
            "Port": 3306,
          },
        "Engine": "mysql",
        "EngineVersion": "5.7.22",
        "EnhancedMonitoringResourceArn": null,
        "IAMDatabaseAuthenticationEnabled": false,
        "InstanceCreateTime": "2019-01-01T00:00:00.000Z",
        "Iops": null,
        "KmsKeyId": "arn:aws:kms:us-west-2:123456789012:key/111222333",
        "LatestRestorableTime": "2019-01-01T00:00:00Z",
        "LicenseModel": "general-public-license",
        "ListenerEndpoint": null,
        "MasterUsername": "superuser",
        "MaxAllocatedStorage": null,
        "MonitoringInterval": 0,
        "MonitoringRoleArn": null,
        "MultiAZ": false,
        "OptionGroupMemberships":
          [{ "OptionGroupName": "default:mysql-5-7", "Status": "in-sync" }],
        "PendingModifiedValues":
          {
            "AllocatedStorage": null,
            "BackupRetentionPeriod": null,
            "CACertificateIdentifier": null,
            "DBInstanceClass": null,
            "DBInstanceIdentifier": null,
            "DBSubnetGroupName": null,
            "EngineVersion": null,
            "Iops": null,
            "LicenseModel": null,
            "MasterUserPassword": null,
            "MultiAZ": null,
            "PendingCloudwatchLogsExports": null,
            "Port": null,
            "ProcessorFeatures": null,
            "StorageType": null,
          },
        "PerformanceInsightsEnabled": false,
        "PerformanceInsightsKMSKeyId": null,
        "PerformanceInsightsRetentionPeriod": null,
        "PreferredBackupWindow": "07:31-08:01",
        "PreferredMaintenanceWindow": "thu:12:02-thu:12:32",
        "ProcessorFeatures": null,
        "PromotionTier": null,
        "PubliclyAccessible": true,
        "ReadReplicaDBClusterIdentifiers": null,
        "ReadReplicaDBInstanceIdentifiers": null,
        "ReadReplicaSourceDBInstanceIdentifier": null,
        "SecondaryAvailabilityZone": null,
        "SnapshotAttributes":
          [
            {
              "DBSnapshotAttributes":
                [{ "AttributeName": "restore", "AttributeValues": null }],
              "DBSnapshotIdentifier": "rds:example-instance-2019-01-01-07-36",
            },
            {
              "DBSnapshotAttributes":
                [{ "AttributeName": "restore", "AttributeValues": null }],
              "DBSnapshotIdentifier": "rds:example-instance-2019-01-08-07-36",
            },
          ],
        "StatusInfos": null,
        "StorageEncrypted": true,
        "StorageType": "gp2",
        "TdeCredentialArn": null,
        "Timezone": null,
        "VpcSecurityGroups":
          [{ "Status": "active", "VpcSecurityGroupId": "sg-112233" }],
      }
  - Name: Instance Auto Minor Version Upgrade Not Enabled
    ExpectedResult: false
    Resource:
      {
        "AllocatedStorage": 20,
        "AssociatedRoles": null,
        "AutoMinorVersionUpgrade": false,
        "AvailabilityZone": "us-west-2a",
        "BackupRetentionPeriod": 7,
        "CACertificateIdentifier": "rds-ca-2015",
        "CharacterSetName": null,
        "CopyTagsToSnapshot": false,
        "DBClusterIdentifier": null,
        "DBInstanceArn": "arn:aws:rds:us-west-2:123456789012:db:example-instance",
        "DBInstanceClass": "db.m4.xlarge",
        "DBInstanceIdentifier": "example-instance",
        "DBInstanceStatus": "available",
        "DBName": "db_1",
        "DBParameterGroups":
          [
            {
              "DBParameterGroupName": "default.mysql5.7",
              "ParameterApplyStatus": "in-sync",
            },
          ],
        "DBSecurityGroups": null,
        "DBSubnetGroup":
          {
            "DBSubnetGroupArn": null,
            "DBSubnetGroupDescription": "default",
            "DBSubnetGroupName": "default",
            "SubnetGroupStatus": "Complete",
            "Subnets":
              [
                {
                  "SubnetAvailabilityZone": { "Name": "us-west-2b" },
                  "SubnetIdentifier": "subnet-111222333",
                  "SubnetStatus": "Active",
                },
                {
                  "SubnetAvailabilityZone": { "Name": "us-west-2d" },
                  "SubnetIdentifier": "subnet-444555666",
                  "SubnetStatus": "Active",
                },
              ],
            "VpcId": "vpc-111222333",
          },
        "DbInstancePort": 0,
        "DbiResourceId": "db-ABCDEFGHIJKLMNOP",
        "DeletionProtection": false,
        "DomainMemberships": null,
        "EnabledCloudwatchLogsExports": null,
        "Endpoint":
          {
            "Address": "example-instance.abcdefghijkl.us-west-2.rds.amazonaws.com",
            "HostedZoneId": "ABCDEF1234",
            "Port": 3306,
          },
        "Engine": "mysql",
        "EngineVersion": "5.7.22",
        "EnhancedMonitoringResourceArn": null,
        "IAMDatabaseAuthenticationEnabled": false,
        "InstanceCreateTime": "2019-01-01T00:00:00.000Z",
        "Iops": null,
        "KmsKeyId": "arn:aws:kms:us-west-2:123456789012:key/111222333",
        "LatestRestorableTime": "2019-01-01T00:00:00Z",
        "LicenseModel": "general-public-license",
        "ListenerEndpoint": null,
        "MasterUsername": "superuser",
        "MaxAllocatedStorage": null,
        "MonitoringInterval": 0,
        "MonitoringRoleArn": null,
        "MultiAZ": false,
        "OptionGroupMemberships":
          [{ "OptionGroupName": "default:mysql-5-7", "Status": "in-sync" }],
        "PendingModifiedValues":
          {
            "AllocatedStorage": null,
            "BackupRetentionPeriod": null,
            "CACertificateIdentifier": null,
            "DBInstanceClass": null,
            "DBInstanceIdentifier": null,
            "DBSubnetGroupName": null,
            "EngineVersion": null,
            "Iops": null,
            "LicenseModel": null,
            "MasterUserPassword": null,
            "MultiAZ": null,
            "PendingCloudwatchLogsExports": null,
            "Port": null,
            "ProcessorFeatures": null,
            "StorageType": null,
          },
        "PerformanceInsightsEnabled": false,
        "PerformanceInsightsKMSKeyId": null,
        "PerformanceInsightsRetentionPeriod": null,
        "PreferredBackupWindow": "07:31-08:01",
        "PreferredMaintenanceWindow": "thu:12:02-thu:12:32",
        "ProcessorFeatures": null,
        "PromotionTier": null,
        "PubliclyAccessible": true,
        "ReadReplicaDBClusterIdentifiers": null,
        "ReadReplicaDBInstanceIdentifiers": null,
        "ReadReplicaSourceDBInstanceIdentifier": null,
        "SecondaryAvailabilityZone": null,
        "SnapshotAttributes":
          [
            {
              "DBSnapshotAttributes":
                [{ "AttributeName": "restore", "AttributeValues": null }],
              "DBSnapshotIdentifier": "rds:example-instance-2019-01-01-07-36",
            },
            {
              "DBSnapshotAttributes":
                [{ "AttributeName": "restore", "AttributeValues": null }],
              "DBSnapshotIdentifier": "rds:example-instance-2019-01-08-07-36",
            },
          ],
        "StatusInfos": null,
        "StorageEncrypted": true,
        "StorageType": "gp2",
        "TdeCredentialArn": null,
        "Timezone": null,
        "VpcSecurityGroups":
          [{ "Status": "active", "VpcSecurityGroupId": "sg-112233" }],
      }

Detection logic

Condition

AutoMinorVersionUpgrade not is_not_null

Exclusions

Top-level NOT(...) conjuncts: predicates this rule actively suppresses.

Field	Kind	Excluded values
`AutoMinorVersionUpgrade`	is_not_null	(no value, null check)

`j` / `k`	Scroll down / up
`d` / `u`	Half-page down / up
`gg` / `G`	Top / bottom
`h` / `l`	History back / forward
`f`	Follow link (`Shift` = new tab)
`/`	Focus search
`?`	Toggle this help
`↑` / `↓`	Navigate search results
`Enter`	Open highlighted result
`Esc`	Close results / dialog

`type:`	`events` / `rules` / `providers`
`vendor:`	`sigma` / `elastic` / `splunk` / `kusto` / `chronicle` (vendor name alone also works: `sigma:`, `kql:`, `secops:`…)
`tactic:`	TA-id, slug, or name: `credential_access`, `TA0006`
`technique:`	technique or sub-technique ID: `T1003`, `T1003.001` (alias `tech:`)
`severity:`	`critical` / `high` / `medium` / `low` / `informational` (alias `sev:`)
`risk_score`	Numeric comparison on the Elastic risk score (0 to 100): `risk_score>50`, `risk_score<=20`, `risk_score=99` (alias `risk`; Elastic rules only)
`stages:`	Rules with exactly N pipeline stages
`correlation:`	`single_event` / `sequence` / `alternatives` / `alternatives_cross_log` / `all_required` / `correlated`
`with:`	Co-occurrence event-id; stacks (`with:4624 with:4769`) to require all, while a comma list in one occurrence (`with:4624,4769`) is an either-or group. Implies multi-event
`like:`	Structural neighbors of a rule slug (equivalents + subsumption stricter / broader): `like:comsvcs_lsass_memory_dump-splunk-sysmon`
`groupby:`	Entity-grouping substring match against `group_by_keys`: `groupby:user`, `groupby:host`
`uses:`	Rules whose predicate tree touches the field (any kind, any value): `uses:CommandLine`
`excludes:`	Rules with top-level `not()` clauses on the field (FP whitelists): `excludes:ParentImage`
`field:` / `value:`	Predicate search; narrows rule cards to those with a matching leaf and drives the indicator tier. Unquoted = substring, wildcards allowed (`value:mimikatz`)
`indicator:`	Shorthand for `field:F value:V`: `indicator:Image=*\powershell.exe`
`kind:`	Filter by predicate kind. Narrows rule cards to those carrying a matching predicate leaf (`vendor:elastic kind:cidr_match`) and drives the indicator tier: `contains` / `starts_with` / `ends_with` / `regex` / `cidr` / `eq` / `in` … (operator aliases `op:`/`match:`)
`has:` / `no:`	`sample`, `field`, `notes`, `refs`, `trace`, `thirdparty`, `rule`, `pattern`, `timewindow`, `threshold`, `newterms`, `sigma`/`elastic`/`splunk`/`kusto`/`chronicle`
`-op:val`	Exclude matches; works on most operators but not `type:`/`like:`/`has:`/`no:` (use `no:<flag>` to exclude a rule flag): `tactic:execution -vendor:splunk`. Standalone `-kind:`/`-field:`/`-value:` drop every rule carrying a matching predicate leaf (`type:rules -kind:is_null`)
`field:"…"` / `value:"…"`	Quoted value = anchored exact match (also allows spaces): `value:"net user"`
`a,b`	Comma = OR inside one operator (`vendor:sigma,elastic`, `severity:high,critical`); repeating a facet merges the same way. `field:`/`value:` never split (literal commas)
`vendors:` / `stage:`	Singular and plural spellings fold to the canonical operator and value: `tactics:` = `tactic:`, `type:event` = `type:events`, `correlation:sequences` = `correlation:sequence`, `has:thresholds` = `has:threshold`
`"quoted phrase"`	Exact-match a multi-word phrase (free text)

AWS RDS Instance Minor Version Upgrades

Rule body yaml

Detection logic

Condition

Exclusions

Keyboard shortcuts

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