mirror of https://github.com/MISP/misp-modules
74 lines
3.1 KiB
Python
74 lines
3.1 KiB
Python
from pymisp import MISPEvent, MISPObject
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import json
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import requests
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misperrors = {'error': 'Error'}
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mispattributes = {'input': ['vulnerability'], 'format': 'misp_standard'}
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moduleinfo = {'version': '1', 'author': 'Christian Studer', 'description': 'An expansion module to enrich a CVE attribute with the vulnerability information.', 'module-type': ['expansion', 'hover']}
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moduleconfig = []
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cveapi_url = 'https://cve.circl.lu/api/cve/'
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class VulnerabilityParser():
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def __init__(self, vulnerability):
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self.vulnerability = vulnerability
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self.misp_event = MISPEvent()
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self.vulnerability_mapping = {
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'id': ('text', 'id'), 'summary': ('text', 'summary'),
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'vulnerable_configuration_cpe_2_2': ('text', 'vulnerable_configuration'),
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'Modified': ('datetime', 'modified'), 'Published': ('datetime', 'published'),
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'references': ('link', 'references'), 'cvss': ('float', 'cvss')}
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def get_result(self):
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event = json.loads(self.misp_event.to_json())['Event']
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results = {key: event[key] for key in ('Attribute', 'Object') if (key in event and event[key])}
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return {'results': results}
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def parse_vulnerability_information(self):
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vulnerability_object = MISPObject('vulnerability')
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for feature in ('id', 'summary', 'Modified', 'cvss'):
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value = self.vulnerability.get(feature)
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if value:
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attribute_type, relation = self.vulnerability_mapping[feature]
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vulnerability_object.add_attribute(relation, **{'type': attribute_type, 'value': value})
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if 'Published' in self.vulnerability:
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vulnerability_object.add_attribute('published', **{'type': 'datetime', 'value': self.vulnerability['Published']})
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vulnerability_object.add_attribute('state', **{'type': 'text', 'value': 'Published'})
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for feature in ('references', 'vulnerable_configuration_cpe_2_2'):
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if feature in self.vulnerability:
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attribute_type, relation = self.vulnerability_mapping[feature]
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for value in self.vulnerability[feature]:
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vulnerability_object.add_attribute(relation, **{'type': attribute_type, 'value': value})
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self.misp_event.add_object(**vulnerability_object)
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def handler(q=False):
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if q is False:
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return False
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request = json.loads(q)
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attribute = request.get('attribute')
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if attribute.get('type') != 'vulnerability':
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misperrors['error'] = 'Vulnerability id missing.'
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return misperrors
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r = requests.get("{}{}".format(cveapi_url, attribute['value']))
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if r.status_code == 200:
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vulnerability = r.json()
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if not vulnerability:
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misperrors['error'] = 'Non existing CVE'
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return misperrors['error']
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else:
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misperrors['error'] = 'cve.circl.lu API not accessible'
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return misperrors['error']
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parser = VulnerabilityParser(vulnerability)
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parser.parse_vulnerability_information()
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return parser.get_result()
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def introspection():
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return mispattributes
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def version():
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moduleinfo['config'] = moduleconfig
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return moduleinfo
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