WID Notifier

The German BSI and LSI Bavaria each have a page listing current security notices.
This software queries the APIs of these services for new security notices and sends configurable email notifications.

API Endpoints

	ID	Portal URL
BSI	bund	https://wid.cert-bund.de/portal/wid/kurzinformationen
LSI	bay	https://wid.lsi.bayern.de/portal/wid/warnmeldungen

Supported Platforms

This Software only supports Linux.

Build

To cross-compile the software for i386, amd64, arm and arm64, run build.sh.
You need a go version >= 1.21 and git.

Usage

./wid-notifier <configfile>

where <configfile> is the path of your configuration file. If you don't have a config file yet, the software will create an initial config at the given location. See Configuration for more info.

Configuration

Example:

{
  "api_fetch_interval": 600,
  "datafile": "data",
  "enabled_api_endpoints": [
    "bay",
    "bund"
  ],
  "loglevel": 2,
  "recipients": [
    {
      "address": "guenther@example.org",
      "include": [
        {"classification": "kritisch"},
        {"title_contains": "jQuery"}
      ]
    }
  ],
  "smtp": {
    "from": "from@example.org",
    "host": "example.org",
    "port": 587,
    "user": "from@example.org",
    "password": "SiEhAbEnMiChInSgEsIcHtGeFiLmTdAsDüRfEnSiEnIcHt"
  },
  "template": {
    "subject": "",
    "body": ""
  }
}

To show debug messages, set the loglevel to 3.

Filters

You define filters for notices to be sent per recipient. Multiple filters can be set per recipient and multiple criteria can be used per filter. The configuration field for those filters is include. See Configuration for an example.

It is determined by the following logic, if a notice is included:

{criteria, criteria, ... ALL APPLY}
OR {criteria, criteria, ... ALL APPLY}
OR ...

The following criteria are available. Criteria marked with * are for optional fields that are not supported by every API endpoint (e.g. https://wid.lsi.bayern.de) - notices from those endpoints will therefore not be included when using those criteria in filters.

"include": [
  {
    "any": false,
    "title_contains": "",
    "classification": "",
    "min_basescore": 0,
    "status": "",
    "products_contain": "",
    "no_patch": "",
    "api_endpoint": ""
  },
  ...
]

any

Includes all notices if set to true.

"any": true

title_contains

Include notices whose title contains this text.

"title_contains": "Denial Of Service"

If set to "", this criteria will be ignored.

classification

Include notices whose classification is in this list.
Classification can be "kritisch", "hoch", "mittel" or "niedrig".

"classification": "hoch"

If set to "", this criteria will be ignored.

min_basescore *

Include notices whose basescore (0 - 100) is >= min_basescore.

"min_basescore": 40

This criteria will be ignored if set to 0.

status *

Include notices with this status. This is usually either NEU or UPDATE.

"status": "NEU"

If set to "", this criteria will be ignored.

products_contain *

Include notices whose product list contains this text.

"products_contain": "Debian Linux"

If set to "", this criteria will be ignored.

no_patch *

If set to "true", notices where no patch is available will be included.

"no_patch": "true"

If set to "false", notices where no patch is available will be included.

"no_patch": "false"

If set to "", this criteria will be ignored.

api_endpoint

Includes notices from the given API Endpoint.

"api_endpoint": "bund"

If set to "", this criteria will be ignored.

Templates

If you don't like the default appearance of the notification mails, you can write your own templates for the mail subject and body.

The syntax for the mail templates is described here.

All fields from the WidNotice struct can be used.

type WidNotice struct {
  Uuid string
  Name string
  Title string
  Published time.Time
  Classification string
  // optional fields (only fully supported by cert-bund)
  Basescore int // -1 = unknown
  Status string // "" = unknown
  ProductNames []string // empty = unknown
  Cves []string // empty = unknown
  NoPatch string // "" = unknown
  // metadata
  ApiEndpointId string
  PortalUrl string
}

For an example, take a look at DEFAULT_SUBJECT_TEMPLATE and DEFAULT_BODY_TEMPLATE in template.go.