|
| 1 | +# |
| 2 | +# Copyright (c) nexB Inc. and others. All rights reserved. |
| 3 | +# VulnerableCode is a trademark of nexB Inc. |
| 4 | +# SPDX-License-Identifier: Apache-2.0 |
| 5 | +# See http://www.apache.org/licenses/LICENSE-2.0 for the license text. |
| 6 | +# See https://github.com/nexB/vulnerablecode for support or download. |
| 7 | +# See https://aboutcode.org for more information about nexB OSS projects. |
| 8 | +# |
| 9 | + |
| 10 | +import logging |
| 11 | +from typing import Iterable |
| 12 | +from typing import List |
| 13 | + |
| 14 | +import requests |
| 15 | +from packageurl import PackageURL |
| 16 | + |
| 17 | +from vulntotal.validator import DataSource |
| 18 | +from vulntotal.validator import InvalidCVEError |
| 19 | +from vulntotal.validator import VendorData |
| 20 | + |
| 21 | +logger = logging.getLogger(__name__) |
| 22 | + |
| 23 | + |
| 24 | +class SafetydbDataSource(DataSource): |
| 25 | + spdx_license_expression = "CC-BY-NC-4.0" |
| 26 | + license_url = "https://github.com/pyupio/safety-db/blob/master/LICENSE.txt" |
| 27 | + url = "https://raw.githubusercontent.com/pyupio/safety-db/master/data/insecure_full.json" |
| 28 | + |
| 29 | + def fetch_advisory(self): |
| 30 | + """ |
| 31 | + Fetch entire JSON advisory from pyupio repository |
| 32 | +
|
| 33 | + Parameters: |
| 34 | +
|
| 35 | + Returns: |
| 36 | + A JSON object containing the advisory information for insecure packages, or None if an error occurs while fetching data from safetydb repo's URL. |
| 37 | + """ |
| 38 | + |
| 39 | + response = requests.get(self.url) |
| 40 | + try: |
| 41 | + response.raise_for_status() |
| 42 | + except requests.exceptions.HTTPError as e: |
| 43 | + logger.error(f"Error while fetching safetydb advisories: {e}") |
| 44 | + return |
| 45 | + |
| 46 | + return response.json() |
| 47 | + |
| 48 | + def datasource_advisory(self, purl) -> Iterable[VendorData]: |
| 49 | + if purl.type not in self.supported_ecosystem(): |
| 50 | + return [] |
| 51 | + advisory = self.fetch_advisory() |
| 52 | + self._raw_dump.append(advisory) |
| 53 | + return parse_advisory(advisory, purl) |
| 54 | + |
| 55 | + def datasource_advisory_from_cve(self, cve: str) -> Iterable[VendorData]: |
| 56 | + if not cve.upper().startswith("CVE-"): |
| 57 | + raise InvalidCVEError |
| 58 | + advisory = self.fetch_advisory() |
| 59 | + self._raw_dump.append(advisory) |
| 60 | + return parse_advisory_for_cve(advisory, cve) |
| 61 | + |
| 62 | + @classmethod |
| 63 | + def supported_ecosystem(cls): |
| 64 | + return {"pypi": "PyPI"} |
| 65 | + |
| 66 | + |
| 67 | +def parse_advisory(response, purl: PackageURL) -> Iterable[VendorData]: |
| 68 | + """ |
| 69 | + Parse response from safetydb API and yield VendorData |
| 70 | +
|
| 71 | + Parameters: |
| 72 | + response: A JSON object containing the response data from the safetydb datasource. |
| 73 | +
|
| 74 | + Yields: |
| 75 | + VendorData instance containing the advisory information for the package. |
| 76 | + """ |
| 77 | + |
| 78 | + for advisory in response.get(purl.name, []): |
| 79 | + yield VendorData( |
| 80 | + purl=PackageURL(purl.type, purl.namespace, purl.name), |
| 81 | + aliases=[advisory.get("cve"), advisory.get("id")], |
| 82 | + affected_versions=sorted(advisory.get("specs")), |
| 83 | + fixed_versions=[], |
| 84 | + ) |
| 85 | + |
| 86 | + |
| 87 | +def parse_advisory_for_cve(response, cve: str) -> Iterable[VendorData]: |
| 88 | + """ |
| 89 | + Parse response from safetydb API and yield VendorData with specified CVE |
| 90 | +
|
| 91 | + Parameters: |
| 92 | + response: A JSON object containing the response data from the safetydb datasource. |
| 93 | +
|
| 94 | + Yields: |
| 95 | + VendorData instance containing the advisory information for the package. |
| 96 | + """ |
| 97 | + |
| 98 | + for package, advisories in response.items(): |
| 99 | + if package == "$meta": |
| 100 | + continue |
| 101 | + |
| 102 | + for advisory in advisories: |
| 103 | + if advisory.get("cve") == cve: |
| 104 | + yield VendorData( |
| 105 | + purl=PackageURL(type="pypi", name=package), |
| 106 | + aliases=[advisory.get("cve"), advisory.get("id")], |
| 107 | + affected_versions=sorted(advisory.get("specs")), |
| 108 | + fixed_versions=[], |
| 109 | + ) |
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