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| 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/aboutcode-org/vulnerablecode for support or download. |
| 7 | +# See https://aboutcode.org for more information about nexB OSS projects. |
| 8 | +# |
| 9 | + |
| 10 | +import re |
| 11 | +from typing import Any |
| 12 | +from typing import Iterable |
| 13 | +from typing import Mapping |
| 14 | + |
| 15 | +from packageurl import PackageURL |
| 16 | +from univers.version_range import DebianVersionRange |
| 17 | + |
| 18 | +from vulnerabilities.importer import AdvisoryData |
| 19 | +from vulnerabilities.importer import AffectedPackageV2 |
| 20 | +from vulnerabilities.importer import ReferenceV2 |
| 21 | +from vulnerabilities.pipelines import VulnerableCodeBaseImporterPipelineV2 |
| 22 | +from vulnerabilities.utils import create_weaknesses_list |
| 23 | +from vulnerabilities.utils import dedupe |
| 24 | +from vulnerabilities.utils import fetch_response |
| 25 | +from vulnerabilities.utils import get_item |
| 26 | + |
| 27 | + |
| 28 | +class DebianImporterPipeline(VulnerableCodeBaseImporterPipelineV2): |
| 29 | + """Debian Importer Pipeline""" |
| 30 | + |
| 31 | + pipeline_id = "debian_importer_v2" |
| 32 | + spdx_license_expression = "LicenseRef-scancode-other-permissive" |
| 33 | + license_url = "https://www.debian.org/license" |
| 34 | + notice = """ |
| 35 | + From: Tushar Goel <tgoel@nexb.com> |
| 36 | + Date: Thu, May 12, 2022 at 11:42 PM +00:00 |
| 37 | + Subject: Usage of Debian Security Data in VulnerableCode |
| 38 | + To: <team@security.debian.org> |
| 39 | +
|
| 40 | + Hey, |
| 41 | +
|
| 42 | + We would like to integrate the debian security data in vulnerablecode |
| 43 | + [1][2] which is a FOSS db of FOSS vulnerability data. We were not able |
| 44 | + to know under which license the debian security data comes. We would |
| 45 | + be grateful to have your acknowledgement over usage of the debian |
| 46 | + security data in vulnerablecode and have some kind of licensing |
| 47 | + declaration from your side. |
| 48 | +
|
| 49 | + [1] - https://github.com/nexB/vulnerablecode |
| 50 | + [2] - https://github.com/nexB/vulnerablecode/pull/723 |
| 51 | +
|
| 52 | + Regards, |
| 53 | +
|
| 54 | + From: Moritz Mühlenhoff <jmm@inutil.org> |
| 55 | + Date: Wed, May 17, 2022, 19:12 PM +00:00 |
| 56 | + Subject: Re: Usage of Debian Security Data in VulnerableCode |
| 57 | + To: Tushar Goel <tgoel@nexb.com> |
| 58 | + Cc: <team@security.debian.org> |
| 59 | +
|
| 60 | +
|
| 61 | + Am Thu, May 12, 2022 at 05:12:48PM +0530 schrieb Tushar Goel: |
| 62 | + > Hey, |
| 63 | + > |
| 64 | + > We would like to integrate the debian security data in vulnerablecode |
| 65 | + > [1][2] which is a FOSS db of FOSS vulnerability data. We were not able |
| 66 | + > to know under which license the debian security data comes. We would |
| 67 | + > be grateful to have your acknowledgement over usage of the debian |
| 68 | + > security data in vulnerablecode and have some kind of licensing |
| 69 | + > declaration from your side. |
| 70 | +
|
| 71 | + We don't have a specific license, but you have our endorsemen to |
| 72 | + reuse the data by all means :-) |
| 73 | +
|
| 74 | + Cheers, |
| 75 | + Moritz |
| 76 | + """ |
| 77 | + |
| 78 | + api_url = "https://security-tracker.debian.org/tracker/data/json" |
| 79 | + response = None |
| 80 | + |
| 81 | + @classmethod |
| 82 | + def steps(cls): |
| 83 | + return (cls.collect_and_store_advisories,) |
| 84 | + |
| 85 | + def get_response(self): |
| 86 | + try: |
| 87 | + response = fetch_response(self.api_url) |
| 88 | + if response: |
| 89 | + return response.json() |
| 90 | + return {} |
| 91 | + except Exception as e: |
| 92 | + self.log(f"Error fetching data from {self.api_url!r}: {e}") |
| 93 | + return {} |
| 94 | + |
| 95 | + def advisories_count(self) -> int: |
| 96 | + adv_count = 0 |
| 97 | + if not self.response: |
| 98 | + self.response = self.get_response() |
| 99 | + for pkg in self.response: |
| 100 | + recs = len(self.response[pkg]) |
| 101 | + adv_count += recs |
| 102 | + return adv_count |
| 103 | + |
| 104 | + def collect_advisories(self) -> Iterable[AdvisoryData]: |
| 105 | + if not self.response: |
| 106 | + self.response = self.get_response() |
| 107 | + for pkg_name, records in self.response.items(): |
| 108 | + yield from self.parse(pkg_name, records) |
| 109 | + |
| 110 | + def parse(self, pkg_name: str, records: Mapping[str, Any]) -> Iterable[AdvisoryData]: |
| 111 | + |
| 112 | + for record_identifier, record in records.items(): |
| 113 | + affected_versions = [] |
| 114 | + fixed_versions = [] |
| 115 | + |
| 116 | + releases = record["releases"].items() |
| 117 | + for release_name, release_record in releases: |
| 118 | + version = get_item(release_record, "repositories", release_name) |
| 119 | + |
| 120 | + if not version: |
| 121 | + self.log( |
| 122 | + f"Version not found for {release_name} in {record} in package {pkg_name}" |
| 123 | + ) |
| 124 | + continue |
| 125 | + |
| 126 | + purl = PackageURL( |
| 127 | + name=pkg_name, |
| 128 | + type="deb", |
| 129 | + namespace="debian", |
| 130 | + qualifiers={"distro": release_name}, |
| 131 | + ) |
| 132 | + |
| 133 | + if release_record.get("status", "") == "resolved": |
| 134 | + fixed_versions.append(version) |
| 135 | + else: |
| 136 | + affected_versions.append(version) |
| 137 | + |
| 138 | + if release_record.get("fixed_version"): |
| 139 | + fixed_versions.append(release_record["fixed_version"]) |
| 140 | + |
| 141 | + references = [] |
| 142 | + debianbug = record.get("debianbug") |
| 143 | + if debianbug: |
| 144 | + bug_url = f"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug={debianbug}" |
| 145 | + references.append(ReferenceV2(url=bug_url, reference_id=str(debianbug))) |
| 146 | + affected_versions = dedupe(affected_versions) |
| 147 | + fixed_versions = dedupe(fixed_versions) |
| 148 | + if affected_versions: |
| 149 | + affected_version_range = DebianVersionRange.from_versions(affected_versions) |
| 150 | + else: |
| 151 | + affected_version_range = None |
| 152 | + affected_packages = [] |
| 153 | + for fixed_version in fixed_versions: |
| 154 | + affected_packages.append( |
| 155 | + AffectedPackageV2( |
| 156 | + package=purl, |
| 157 | + affected_version_range=affected_version_range, |
| 158 | + fixed_version_range=DebianVersionRange.from_versions([fixed_version]), |
| 159 | + ) |
| 160 | + ) |
| 161 | + weaknesses = get_cwe_from_debian_advisory(record) |
| 162 | + |
| 163 | + yield AdvisoryData( |
| 164 | + advisory_id=f"{pkg_name}/{record_identifier}", |
| 165 | + aliases=[record_identifier], |
| 166 | + summary=record.get("description", ""), |
| 167 | + affected_packages=affected_packages, |
| 168 | + references=references, |
| 169 | + weaknesses=weaknesses, |
| 170 | + url=f"https://security-tracker.debian.org/tracker/{record_identifier}", |
| 171 | + ) |
| 172 | + |
| 173 | + |
| 174 | +def get_cwe_from_debian_advisory(record): |
| 175 | + """ |
| 176 | + Extracts CWE ID strings from the given raw_data and returns a list of CWE IDs. |
| 177 | +
|
| 178 | + >>> get_cwe_from_debian_advisory({"description":"PEAR HTML_QuickForm version 3.2.14 contains an eval injection (CWE-95) vulnerability in HTML_QuickForm's getSubmitValue method, HTML_QuickForm's validate method, HTML_QuickForm_hierselect's _setOptions method, HTML_QuickForm_element's _findValue method, HTML_QuickForm_element's _prepareValue method. that can result in Possible information disclosure, possible impact on data integrity and execution of arbitrary code. This attack appear to be exploitable via A specially crafted query string could be utilised, e.g. http://www.example.com/admin/add_practice_type_id[1]=fubar%27])%20OR%20die(%27OOK!%27);%20//&mode=live. This vulnerability appears to have been fixed in 3.2.15."}) |
| 179 | + [95] |
| 180 | + >>> get_cwe_from_debian_advisory({"description":"There is no WEAKNESS DATA"}) |
| 181 | + [] |
| 182 | + """ |
| 183 | + description = record.get("description") or "" |
| 184 | + pattern = r"CWE-\d+" |
| 185 | + cwe_strings = re.findall(pattern, description) |
| 186 | + weaknesses = create_weaknesses_list(cwe_strings) |
| 187 | + return weaknesses |
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