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# -*- coding: utf-8 -*- |
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# Copyright (C) 2018 Greenbone Networks GmbH |
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# |
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# SPDX-License-Identifier: GPL-2.0-or-later |
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# |
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# This program is free software; you can redistribute it and/or |
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# modify it under the terms of the GNU General Public License |
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# as published by the Free Software Foundation; either version 2 |
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# of the License, or (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program; if not, write to the Free Software |
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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""" Provide functions to handle NVT Info Cache. """ |
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import xml.etree.ElementTree as ET |
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from ospd_openvas.db import NVT_META_FIELDS |
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LIST_FIRST_POS = 0 |
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LIST_LAST_POS = -1 |
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View Code Duplication |
class NVTICache(object): |
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QoD_TYPES = { |
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'exploit': '100', |
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'remote_vul': '99', |
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'remote_app': '98', |
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'package': '97', |
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'registry': '97', |
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'remote_active': '95', |
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'remote_banner': '80', |
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'executable_version': '80', |
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'remote_analysis': '70', |
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'remote_probe': '50', |
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'remote_banner_unreliable': '30', |
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'executable_version_unreliable': '30', |
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'general_note': '1', |
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'default': '70', |
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} |
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NVTICACHE_STR = 'nvticache1.0.0' |
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def __init__(self, openvas_db): |
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self._openvas_db = openvas_db |
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def get_feed_version(self): |
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""" Get feed version. |
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""" |
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return self._openvas_db.get_single_item(self.NVTICACHE_STR) |
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def get_oids(self): |
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""" Get the list of NVT OIDs. |
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""" |
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return self._openvas_db.get_elem_pattern_by_index('filename:*') |
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def get_nvt_params(self, oid): |
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""" Get NVT's preferences. |
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@Return dictonary with preferences and timeout. |
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""" |
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ctx = self._openvas_db.get_kb_context() |
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prefs = self.get_nvt_prefs(ctx, oid) |
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timeout = self.get_nvt_timeout(ctx, oid) |
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vt_params = {} |
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if int(timeout) > 0: |
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vt_params['timeout'] = dict() |
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vt_params['timeout']['type'] = 'entry' |
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vt_params['timeout']['name'] = 'timeout' |
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vt_params['timeout']['description'] = 'Script Timeout' |
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vt_params['timeout']['default'] = timeout |
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if prefs: |
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for nvt_pref in prefs: |
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elem = nvt_pref.split('|||') |
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vt_params[elem[0]] = dict() |
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vt_params[elem[0]]['type'] = elem[1] |
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vt_params[elem[0]]['name'] = elem[0] |
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vt_params[elem[0]]['description'] = 'Description' |
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if elem[2]: |
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vt_params[elem[0]]['default'] = elem[2] |
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else: |
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vt_params[elem[0]]['default'] = '' |
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return vt_params |
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@staticmethod |
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def _parse_metadata_tags(tags_str): |
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""" Parse a string with multiple tags. |
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Arguments: |
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tags_str (str) String with tags separated by `|`. |
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Return a dictionary with the tags. |
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""" |
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tags_dict = dict() |
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tags = tags_str.split('|') |
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for tag in tags: |
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try: |
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_tag, _value = tag.split('=', 1) |
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except ValueError: |
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logger.error('Tag %s in %s has no value.' % (_tag, oid)) |
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continue |
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tags_dict[_tag] = _value |
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return tags_dict |
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def get_nvt_metadata(self, oid): |
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""" Get a full NVT. Returns an XML tree with the NVT metadata. |
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""" |
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ctx = self._openvas_db.get_kb_context() |
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resp = ctx.lrange("nvt:%s" % oid, |
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NVT_META_FIELDS.index("NVT_FILENAME_POS"), |
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NVT_META_FIELDS.index("NVT_NAME_POS")) |
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if not isinstance(resp, list) or len(resp) == 0: |
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return None |
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subelem = ['filename', 'required_keys', 'mandatory_keys', |
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'excluded_keys', 'required_udp_ports', 'required_ports', |
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'dependencies', 'tag', 'cve', 'bid', 'xref', 'category', |
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'timeout', 'family', 'name', ] |
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custom = dict() |
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for child, res in zip(subelem, resp): |
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if child not in ['cve', 'bid', 'xref', 'tag',] and res: |
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custom[child] = res |
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elif child == 'tag': |
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custom.update(self._parse_metadata_tags(res)) |
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return custom |
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def get_nvt_refs(self, oid): |
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""" Get a full NVT. Returns an XML tree with the NVT references. |
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""" |
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ctx = self._openvas_db.get_kb_context() |
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resp = ctx.lrange("nvt:%s" % oid, |
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NVT_META_FIELDS.index("NVT_CVES_POS"), |
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NVT_META_FIELDS.index("NVT_XREFS_POS")) |
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if not isinstance(resp, list) or len(resp) == 0: |
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return None |
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subelem = ['cve', 'bid', 'xref',] |
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refs = dict() |
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for child, res in zip(subelem, resp): |
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refs[child] = res.split(", ") |
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return refs |
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def get_nvt_prefs(self, ctx, oid): |
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""" Get NVT preferences. """ |
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key = 'oid:%s:prefs' % oid |
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prefs = ctx.lrange(key, start=LIST_FIRST_POS, |
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end=LIST_LAST_POS) |
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return prefs |
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def get_nvt_timeout(self, ctx, oid): |
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""" Get NVT timeout""" |
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timeout = ctx.lindex('nvt:%s' % oid, |
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NVT_META_FIELDS.index("NVT_TIMEOUT_POS")) |
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return timeout |
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def get_nvt_tag(self, ctx, oid): |
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""" Get a dictionary with the NVT Tags of the given OID.""" |
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tag = ctx.lindex('nvt:%s' % oid, |
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NVT_META_FIELDS.index('NVT_TAGS_POS')) |
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tags = tag.split('|') |
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return dict([item.split('=', 1) for item in tags]) |
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greenbone /
ospd-openvas
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