104 lines
3.8 KiB
Python
104 lines
3.8 KiB
Python
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import logging
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import sys
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from collections import defaultdict
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from app import secscan_api
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from data.model.tag import filter_tags_have_repository_event, get_matching_tags
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from data.database import (Image, ImageStorage, ExternalNotificationEvent, Repository,
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RepositoryTag)
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from endpoints.notificationhelper import spawn_notification
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from util.secscan import PRIORITY_LEVELS
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from util.secscan.api import APIRequestFailure
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logger = logging.getLogger(__name__)
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def process_notification_data(notification_data):
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""" Processes the given notification data to spawn vulnerability notifications as necessary.
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Returns whether the processing succeeded.
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"""
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new_data = notification_data['New']
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old_data = notification_data.get('Old', {})
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new_vuln = new_data['Vulnerability']
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old_vuln = old_data.get('Vulnerability', {})
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new_layer_ids = set(new_data.get('LayersIntroducingVulnerability', []))
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old_layer_ids = set(old_data.get('LayersIntroducingVulnerability', []))
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new_severity = PRIORITY_LEVELS.get(new_vuln.get('Severity', 'Unknown'), {'index': sys.maxint})
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old_severity = PRIORITY_LEVELS.get(old_vuln.get('Severity', 'Unknown'), {'index': sys.maxint})
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# By default we only notify the new layers that are affected by the vulnerability. If, however,
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# the severity of the vulnerability has increased, we need to notify *all* layers, as we might
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# need to send new notifications for older layers.
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notify_layers = new_layer_ids - old_layer_ids
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if new_severity['index'] < old_severity['index']:
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notify_layers = new_layer_ids | old_layer_ids
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if not notify_layers:
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# Nothing more to do.
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return True
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# Lookup the external event for when we have vulnerabilities.
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event = ExternalNotificationEvent.get(name='vulnerability_found')
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# For each layer, retrieving the matching tags and join with repository to determine which
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# require new notifications.
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tag_map = defaultdict(set)
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repository_map = {}
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cve_id = new_vuln['Name']
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# Find all tags that contain the layer(s) introducing the vulnerability,
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# in repositories that have the event setup.
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for layer_id in notify_layers:
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# Split the layer ID into its Docker Image ID and storage ID.
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(docker_image_id, storage_uuid) = layer_id.split('.', 2)
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# Find the matching tags.
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matching = get_matching_tags(docker_image_id, storage_uuid, RepositoryTag, Repository,
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Image, ImageStorage)
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tags = list(filter_tags_have_repository_event(matching, event))
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check_map = {}
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for tag in tags:
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# Verify that the tag's root image has the vulnerability.
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tag_layer_id = '%s.%s' % (tag.image.docker_image_id, tag.image.storage.uuid)
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logger.debug('Checking if layer %s is vulnerable to %s', tag_layer_id, cve_id)
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if not tag_layer_id in check_map:
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try:
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is_vulerable = secscan_api.check_layer_vulnerable(tag_layer_id, cve_id)
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except APIRequestFailure:
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return False
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check_map[tag_layer_id] = is_vulerable
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logger.debug('Result of layer %s is vulnerable to %s check: %s', tag_layer_id, cve_id,
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check_map[tag_layer_id])
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if check_map[tag_layer_id]:
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# Add the vulnerable tag to the list.
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tag_map[tag.repository_id].add(tag.name)
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repository_map[tag.repository_id] = tag.repository
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# For each of the tags found, issue a notification.
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for repository_id in tag_map:
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tags = tag_map[repository_id]
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event_data = {
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'tags': list(tags),
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'vulnerability': {
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'id': cve_id,
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'description': new_vuln.get('Description', None),
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'link': new_vuln.get('Link', None),
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'priority': new_severity['title'],
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'has_fix': 'FixedIn' in new_vuln,
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},
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}
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spawn_notification(repository_map[repository_id], 'vulnerability_found', event_data)
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return True
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