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| 1 | +# Copyright (c) nexB Inc. and others. All rights reserved. |
| 2 | +# http://nexb.com and https://github.com/nexB/vulnerablecode/ |
| 3 | +# The VulnerableCode software is licensed under the Apache License version 2.0. |
| 4 | +# Data generated with VulnerableCode require an acknowledgment. |
| 5 | +# |
| 6 | +# You may not use this software except in compliance with the License. |
| 7 | +# You may obtain a copy of the License at: http://apache.org/licenses/LICENSE-2.0 |
| 8 | +# Unless required by applicable law or agreed to in writing, software distributed |
| 9 | +# under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR |
| 10 | +# CONDITIONS OF ANY KIND, either express or implied. See the License for the |
| 11 | +# specific language governing permissions and limitations under the License. |
| 12 | +# |
| 13 | +# When you publish or redistribute any data created with VulnerableCode or any VulnerableCode |
| 14 | +# derivative work, you must accompany this data with the following acknowledgment: |
| 15 | +# |
| 16 | +# Generated with VulnerableCode and provided on an "AS IS" BASIS, WITHOUT WARRANTIES |
| 17 | +# OR CONDITIONS OF ANY KIND, either express or implied. No content created from |
| 18 | +# VulnerableCode should be considered or used as legal advice. Consult an Attorney |
| 19 | +# for any legal advice. |
| 20 | +# VulnerableCode is a free software tool from nexB Inc. and others. |
| 21 | +# Visit https://github.com/nexB/vulnerablecode/ for support and download. |
| 22 | + |
| 23 | +import asyncio |
| 24 | +from typing import List, Set |
| 25 | + |
| 26 | +import yaml |
| 27 | +from dephell_specifier import RangeSpecifier |
| 28 | +from packageurl import PackageURL |
| 29 | + |
| 30 | +from vulnerabilities.data_source import GitDataSource |
| 31 | +from vulnerabilities.data_source import Advisory |
| 32 | +from vulnerabilities.data_source import Reference |
| 33 | +from vulnerabilities.package_managers import HexVersionAPI |
| 34 | +from vulnerabilities.helpers import load_yaml |
| 35 | + |
| 36 | + |
| 37 | +class ElixirSecurityDataSource(GitDataSource): |
| 38 | + def __enter__(self): |
| 39 | + super(ElixirSecurityDataSource, self).__enter__() |
| 40 | + |
| 41 | + if not getattr(self, "_added_files", None): |
| 42 | + self._added_files, self._updated_files = self.file_changes( |
| 43 | + recursive=True, file_ext="yml", subdir="./packages" |
| 44 | + ) |
| 45 | + self.pkg_manager_api = HexVersionAPI() |
| 46 | + self.set_api(self.collect_packages()) |
| 47 | + |
| 48 | + def set_api(self, packages): |
| 49 | + asyncio.run(self.pkg_manager_api.load_api(packages)) |
| 50 | + |
| 51 | + def updated_advisories(self) -> Set[Advisory]: |
| 52 | + files = self._updated_files |
| 53 | + advisories = [] |
| 54 | + for f in files: |
| 55 | + processed_data = self.process_file(f) |
| 56 | + if processed_data: |
| 57 | + advisories.append(processed_data) |
| 58 | + return self.batch_advisories(advisories) |
| 59 | + |
| 60 | + def added_advisories(self) -> Set[Advisory]: |
| 61 | + files = self._added_files |
| 62 | + advisories = [] |
| 63 | + for f in files: |
| 64 | + processed_data = self.process_file(f) |
| 65 | + if processed_data: |
| 66 | + advisories.append(processed_data) |
| 67 | + return self.batch_advisories(advisories) |
| 68 | + |
| 69 | + def collect_packages(self): |
| 70 | + packages = set() |
| 71 | + files = self._updated_files.union(self._added_files) |
| 72 | + for f in files: |
| 73 | + data = load_yaml(f) |
| 74 | + if data.get("package"): |
| 75 | + packages.add(data["package"]) |
| 76 | + |
| 77 | + return packages |
| 78 | + |
| 79 | + def get_versions_for_pkg_from_range_list(self, version_range_list, pkg_name): |
| 80 | + # Takes a list of version ranges(pathced and unaffected) of a package |
| 81 | + # as parameter and returns a tuple of safe package versions and |
| 82 | + # vulnerable package versions |
| 83 | + |
| 84 | + safe_pkg_versions = [] |
| 85 | + vuln_pkg_versions = [] |
| 86 | + all_version_list = self.pkg_manager_api.get(pkg_name) |
| 87 | + if not version_range_list: |
| 88 | + return [], all_version_list |
| 89 | + version_ranges = {RangeSpecifier(r) for r in version_range_list} |
| 90 | + for version in all_version_list: |
| 91 | + if any([version in v for v in version_ranges]): |
| 92 | + safe_pkg_versions.append(version) |
| 93 | + |
| 94 | + vuln_pkg_versions = set(all_version_list) - set(safe_pkg_versions) |
| 95 | + return safe_pkg_versions, vuln_pkg_versions |
| 96 | + |
| 97 | + def process_file(self, path): |
| 98 | + yaml_file = load_yaml(path) |
| 99 | + pkg_name = yaml_file["package"] |
| 100 | + safe_pkg_versions = [] |
| 101 | + vuln_pkg_versions = [] |
| 102 | + if not yaml_file.get("patched_versions"): |
| 103 | + yaml_file["patched_versions"] = [] |
| 104 | + |
| 105 | + if not yaml_file.get("unaffected_versions"): |
| 106 | + yaml_file["unaffected_versions"] = [] |
| 107 | + |
| 108 | + safe_pkg_versions, vuln_pkg_versions = self.get_versions_for_pkg_from_range_list( |
| 109 | + yaml_file["patched_versions"] + yaml_file["unaffected_versions"], |
| 110 | + pkg_name, |
| 111 | + ) |
| 112 | + |
| 113 | + if yaml_file.get("cve"): |
| 114 | + cve_id = "CVE-" + yaml_file["cve"] |
| 115 | + else: |
| 116 | + cve_id = "" |
| 117 | + |
| 118 | + safe_purls = [] |
| 119 | + vuln_purls = [] |
| 120 | + |
| 121 | + safe_purls = { |
| 122 | + PackageURL(name=pkg_name, type="hex", version=version) for version in safe_pkg_versions |
| 123 | + } |
| 124 | + |
| 125 | + vuln_purls = { |
| 126 | + PackageURL(name=pkg_name, type="hex", version=version) for version in vuln_pkg_versions |
| 127 | + } |
| 128 | + |
| 129 | + vuln_references = [ |
| 130 | + Reference( |
| 131 | + reference_id=yaml_file["id"], |
| 132 | + ), |
| 133 | + Reference( |
| 134 | + url=yaml_file["link"], |
| 135 | + ), |
| 136 | + ] |
| 137 | + |
| 138 | + return Advisory( |
| 139 | + summary=yaml_file["description"], |
| 140 | + impacted_package_urls=vuln_purls, |
| 141 | + resolved_package_urls=safe_purls, |
| 142 | + cve_id=cve_id, |
| 143 | + vuln_references=vuln_references, |
| 144 | + ) |
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