205 lines
9 KiB
Python
205 lines
9 KiB
Python
import logging
|
|
import logging.config
|
|
|
|
from collections import defaultdict
|
|
|
|
import features
|
|
|
|
from data.database import ExternalNotificationEvent, IMAGE_NOT_SCANNED_ENGINE_VERSION, Image
|
|
from data.model.tag import filter_tags_have_repository_event, get_tags_for_image
|
|
from data.model.image import set_secscan_status, get_image_with_storage_and_parent_base
|
|
from notifications import spawn_notification
|
|
from util.secscan import PRIORITY_LEVELS
|
|
from util.secscan.api import (APIRequestFailure, AnalyzeLayerException, MissingParentLayerException,
|
|
InvalidLayerException, AnalyzeLayerRetryException)
|
|
from util.morecollections import AttrDict
|
|
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class PreemptedException(Exception):
|
|
""" Exception raised if another worker analyzed the image before this worker was able to do so.
|
|
"""
|
|
|
|
|
|
class LayerAnalyzer(object):
|
|
""" Helper class to perform analysis of a layer via the security scanner. """
|
|
def __init__(self, config, api):
|
|
self._api = api
|
|
self._target_version = config.get('SECURITY_SCANNER_ENGINE_VERSION_TARGET', 2)
|
|
|
|
def analyze_recursively(self, layer):
|
|
""" Analyzes a layer and all its parents. Raises a PreemptedException if the analysis was
|
|
preempted by another worker.
|
|
"""
|
|
try:
|
|
self._analyze_recursively_and_check(layer)
|
|
except MissingParentLayerException:
|
|
# The parent layer of this layer was missing. Force a reanalyze.
|
|
try:
|
|
self._analyze_recursively_and_check(layer, force_parents=True)
|
|
except MissingParentLayerException:
|
|
# Parent is still missing... mark the layer as invalid.
|
|
if not set_secscan_status(layer, False, self._target_version):
|
|
raise PreemptedException
|
|
|
|
def _analyze_recursively_and_check(self, layer, force_parents=False):
|
|
""" Analyzes a layer and all its parents, optionally forcing parents to be reanalyzed,
|
|
and checking for various exceptions that can occur during analysis.
|
|
"""
|
|
try:
|
|
self._analyze_recursively(layer, force_parents=force_parents)
|
|
except InvalidLayerException:
|
|
# One of the parent layers is invalid, so this layer is invalid as well.
|
|
if not set_secscan_status(layer, False, self._target_version):
|
|
raise PreemptedException
|
|
except AnalyzeLayerRetryException:
|
|
# Something went wrong when trying to analyze the layer, but we should retry, so leave
|
|
# the layer unindexed. Another worker will come along and handle it.
|
|
raise APIRequestFailure
|
|
except MissingParentLayerException:
|
|
# Pass upward, as missing parent is handled in the analyze_recursively method.
|
|
raise
|
|
except AnalyzeLayerException:
|
|
# Something went wrong when trying to analyze the layer and we cannot retry, so mark the
|
|
# layer as invalid.
|
|
logger.exception('Got exception when trying to analyze layer %s via security scanner',
|
|
layer.id)
|
|
if not set_secscan_status(layer, False, self._target_version):
|
|
raise PreemptedException
|
|
|
|
def _analyze_recursively(self, layer, force_parents=False):
|
|
# Check if there is a parent layer that needs to be analyzed.
|
|
if layer.parent_id and (force_parents or
|
|
layer.parent.security_indexed_engine < self._target_version):
|
|
try:
|
|
base_query = get_image_with_storage_and_parent_base()
|
|
parent_layer = base_query.where(Image.id == layer.parent_id).get()
|
|
except Image.DoesNotExist:
|
|
logger.warning("Image %s has Image %s as parent but doesn't exist.", layer.id,
|
|
layer.parent_id)
|
|
raise AnalyzeLayerException('Parent image not found')
|
|
|
|
self._analyze_recursively(parent_layer, force_parents=force_parents)
|
|
|
|
# Analyze the layer itself.
|
|
self._analyze(layer, force_parents=force_parents)
|
|
|
|
def _analyze(self, layer, force_parents=False):
|
|
""" Analyzes a single layer.
|
|
|
|
Return a tuple of two bools:
|
|
- The first one tells us if we should evaluate its children.
|
|
- The second one is set to False when another worker pre-empted the candidate's analysis
|
|
for us.
|
|
"""
|
|
# If the parent couldn't be analyzed with the target version or higher, we can't analyze
|
|
# this image. Mark it as failed with the current target version.
|
|
if not force_parents and (layer.parent_id and not layer.parent.security_indexed and
|
|
layer.parent.security_indexed_engine >= self._target_version):
|
|
if not set_secscan_status(layer, False, self._target_version):
|
|
raise PreemptedException
|
|
|
|
# Nothing more to do.
|
|
return
|
|
|
|
# Make sure the image's storage is not marked as uploading. If so, nothing more to do.
|
|
if layer.storage.uploading:
|
|
if not set_secscan_status(layer, False, self._target_version):
|
|
raise PreemptedException
|
|
|
|
# Nothing more to do.
|
|
return
|
|
|
|
# Analyze the image.
|
|
previously_security_indexed_successfully = layer.security_indexed
|
|
previous_security_indexed_engine = layer.security_indexed_engine
|
|
|
|
logger.info('Analyzing layer %s', layer.docker_image_id)
|
|
analyzed_version = self._api.analyze_layer(layer)
|
|
|
|
logger.info('Analyzed layer %s successfully with version %s', layer.docker_image_id,
|
|
analyzed_version)
|
|
|
|
# Mark the image as analyzed.
|
|
if not set_secscan_status(layer, True, analyzed_version):
|
|
# If the image was previously successfully marked as resolved, then set_secscan_status
|
|
# might return False because we're not changing it (since this is a fixup).
|
|
if not previously_security_indexed_successfully:
|
|
raise PreemptedException
|
|
|
|
# If we are the one who've done the job successfully first, then we need to decide if we should
|
|
# send notifications. Notifications are sent if:
|
|
# 1) This is a new layer
|
|
# 2) This is an existing layer that previously did not index properly
|
|
# We don't always send notifications as if we are re-indexing a successful layer for a newer
|
|
# feature set in the security scanner, notifications will be spammy.
|
|
is_new_image = previous_security_indexed_engine == IMAGE_NOT_SCANNED_ENGINE_VERSION
|
|
is_existing_image_unindexed = not is_new_image and not previously_security_indexed_successfully
|
|
if (features.SECURITY_NOTIFICATIONS and (is_new_image or is_existing_image_unindexed)):
|
|
# Get the tags of the layer we analyzed.
|
|
repository_map = defaultdict(list)
|
|
event = ExternalNotificationEvent.get(name='vulnerability_found')
|
|
matching = list(filter_tags_have_repository_event(get_tags_for_image(layer.id), event))
|
|
|
|
for tag in matching:
|
|
repository_map[tag.repository_id].append(tag)
|
|
|
|
# If there is at least one tag,
|
|
# Lookup the vulnerabilities for the image, now that it is analyzed.
|
|
if len(repository_map) > 0:
|
|
logger.debug('Loading data for layer %s', layer.id)
|
|
try:
|
|
layer_data = self._api.get_layer_data(layer, include_vulnerabilities=True)
|
|
except APIRequestFailure:
|
|
raise
|
|
|
|
if layer_data is not None:
|
|
# Dispatch events for any detected vulnerabilities
|
|
logger.debug('Got data for layer %s: %s', layer.id, layer_data)
|
|
found_features = layer_data['Layer'].get('Features', [])
|
|
for repository_id in repository_map:
|
|
tags = repository_map[repository_id]
|
|
vulnerabilities = dict()
|
|
|
|
# Collect all the vulnerabilities found for the layer under each repository and send
|
|
# as a batch notification.
|
|
for feature in found_features:
|
|
if 'Vulnerabilities' not in feature:
|
|
continue
|
|
|
|
for vulnerability in feature.get('Vulnerabilities', []):
|
|
vuln_data = {
|
|
'id': vulnerability['Name'],
|
|
'description': vulnerability.get('Description', None),
|
|
'link': vulnerability.get('Link', None),
|
|
'has_fix': 'FixedBy' in vulnerability,
|
|
|
|
# TODO: Change this key name if/when we change the event format.
|
|
'priority': vulnerability.get('Severity', 'Unknown'),
|
|
}
|
|
|
|
vulnerabilities[vulnerability['Name']] = vuln_data
|
|
|
|
# TODO(jzelinskie): remove when more endpoints have been converted to using
|
|
# interfaces
|
|
repository = AttrDict({
|
|
'namespace_name': tags[0].repository.namespace_user.username,
|
|
'name': tags[0].repository.name,
|
|
})
|
|
|
|
repo_vulnerabilities = list(vulnerabilities.values())
|
|
if not repo_vulnerabilities:
|
|
continue
|
|
|
|
priority_key = lambda v: PRIORITY_LEVELS.get(v['priority'], {}).get('index', 100)
|
|
repo_vulnerabilities.sort(key=priority_key)
|
|
|
|
event_data = {
|
|
'tags': [tag.name for tag in tags],
|
|
'vulnerabilities': repo_vulnerabilities,
|
|
'vulnerability': repo_vulnerabilities[0], # For back-compat with existing events.
|
|
}
|
|
|
|
spawn_notification(repository, 'vulnerability_found', event_data)
|