aboutcode-org · TG1999 · Sep 10, 2024 · Jun 29, 2022
diff --git a/vulnerabilities/importers/gsd.py b/vulnerabilities/importers/gsd.py
@@ -0,0 +1,222 @@
+#
+# Copyright (c) nexB Inc. and others. All rights reserved.
+# VulnerableCode is a trademark of nexB Inc.
+# SPDX-License-Identifier: Apache-2.0
+# See http://www.apache.org/licenses/LICENSE-2.0 for the license text.
+# See https://github.com/nexB/vulnerablecode for support or download.
+# See https://aboutcode.org for more information about nexB OSS projects.
+#
+import json
+import logging
+from io import BytesIO
+from typing import Iterable
+from typing import List
+from typing import Set
+from zipfile import ZipFile
+
+import dateparser
+import requests
+
+from vulnerabilities.importer import AdvisoryData
+from vulnerabilities.importer import Importer
+from vulnerabilities.importer import Reference
+from vulnerabilities.utils import build_description
+from vulnerabilities.utils import dedupe
+
+logger = logging.getLogger(__name__)
+
+
+class GSDImporter:  # TODO inherit from Importer
+    spdx_license_expression = "CC0-1.0"
+    license_url = "https://github.com/cloudsecurityalliance/gsd-database/blob/main/LICENSE"
+    url = "https://codeload.github.com/cloudsecurityalliance/gsd-database/zip/refs/heads/main"
+
+    def advisory_data(self) -> Iterable[AdvisoryData]:
+        response = requests.get(self.url).content
+        with ZipFile(BytesIO(response)) as zip_file:
+            for file_name in zip_file.namelist():
+                if file_name == "gsd-database-main/allowlist.json" or not file_name.endswith(
+                    ".json"
+                ):
+                    continue
+
+                with zip_file.open(file_name) as f:
+                    try:
+                        raw_data = json.load(f)
+                        yield parse_advisory_data(raw_data, file_name)
+                    except Exception as e:
+                        logger.error(f"Invalid GSD advisory data file: {file_name} - {e}")
+
+
+def parse_advisory_data(raw_data, file_name):
+    """
+    Parse a GSD advisory file and return an AdvisoryData.
+    Each advisory file contains the advisory information in JSON format.
+    """
+
+    namespaces = raw_data.get("namespaces") or {}
+    cve_org = namespaces.get("cve.org") or {}
+    nvd_nist_gov = namespaces.get("nvd.nist.gov") or {}
+
+    gsd = raw_data.get("GSD") or {}
+    gsd_id = gsd.get("id") or file_name
+    gsd_alias = gsd.get("alias") or []
+    gsd_description = gsd.get("description") or ""
+
+    gsd_reference_data = gsd.get("") or []
+    gsd_references = [Reference(url=ref) for ref in gsd_reference_data]
+
+    details = gsd_description or "".join(get_description(cve_org))
+
+    aliases_cve_org = get_aliases(cve_org)
+    aliases_nvd_nist_gov = get_aliases(nvd_nist_gov)
+
+    aliases = [gsd_alias, gsd_id] + aliases_cve_org + aliases_nvd_nist_gov
+    aliases = [alias for alias in aliases if alias is not None]
+
+    summary = build_description(summary=get_summary(cve_org), description=details)
+
+    severities = get_severities(cve_org)
+    configurations = nvd_nist_gov.get("configurations") or {}
+    nodes = configurations.get("nodes") or []
+    cpes = get_cpe(nodes)
+
+    references = get_references(cve_org) + gsd_references
+
+    date_published = get_published_date_nvd_nist_gov(nvd_nist_gov)
+
+    return AdvisoryData(
+        aliases=dedupe(aliases),
+        summary=summary,
+        references=references,
+        date_published=date_published,
+    )
+
+
+def get_summary(cve) -> str:
+    """
+    Returns a title of CVE_data_meta
+    >> get_summary    {"CVE_data_meta": {"TITLE": "DoS vulnerability: Invalid Accent Colors"}
+    'DoS vulnerability: Invalid Accent Colors'
+    """
+    cve_data_meta = cve.get("CVE_data_meta") or {}
+    return cve_data_meta.get("TITLE") or ""
+
+
+def get_severities(cve) -> List:
+    """
+    Return a list of CVSS vectorString
+    >>> get_severities({"impact": {"cvss": {"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H"}}})
+    ['CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H']
+    """
+    severities = []
+    impact = cve.get("impact") or {}
+
+    base_metric_2 = impact.get("baseMetricV2") or {}
+    if base_metric_2:
+        cvss_v2 = base_metric_2.get("cvssV2") or {}
+        cvss_vector = cvss_v2.get("vectorString")
+        if cvss_vector:
+            severities.append(cvss_vector)
+
+    base_metric_v3 = impact.get("baseMetricV3") or {}
+    if base_metric_v3:
+        cvss_v3 = base_metric_v3.get("cvssV3") or {}
+        cvss_vector = cvss_v3.get("vectorString")
+        if cvss_vector:
+            severities.append(cvss_vector)
+
+    cvss = impact.get("cvss") or {}
+    if isinstance(cvss, List):
+        for cvss_v in cvss:
+            if isinstance(cvss_v, dict):
+                cvss_vector = cvss_v.get("vectorString") or {}
+                if cvss_vector:
+                    severities.append(cvss_vector)
+    else:
+        cvss_vector = cvss.get("vectorString")
+        if cvss_vector:
+            severities.append(cvss_vector)
+    return severities
+
+
+def get_description(cve) -> [str]:
+    """
+    Get a list description value from description object
+    >>> get_description({"description": {"description_data": [{"lang": "eng","value": "the description"}]}})
+    ['the description']
+    """
+    description = cve.get("description") or {}
+    description_data = description.get("description_data") or []
+    return [desc["value"] for desc in description_data if desc["value"] and desc["lang"] == "eng"]
+
+
+def get_references(cve):
+    """
+    Returns a list of Reference assigned with url
+    >>> get_references({"references": {
+    ...      "reference_data": [{
+    ...            "name": "https://kc.mcafee.com/corporate/index?page=content&id=SB10198",
+    ...             "refsource": "CONFIRM",
+    ...             "tags": ["Vendor Advisory"],
+    ...             "url": "https://kc.mcafee.com/corporate/index?page=content&id=SB10198"}]}})
+    [Reference(reference_id='', reference_type='', url='https://kc.mcafee.com/corporate/index?page=content&id=SB10198', severities=[])]
+    """
+    references = cve.get("references") or {}
+    reference_data = references.get("reference_data") or []
+    return [Reference(url=ref["url"]) for ref in reference_data if ref["url"]]
+
+
+def get_aliases(cve) -> [str]:
+    """
+    Returns a list of aliases
+    >>> get_aliases({"CVE_data_meta": {"ID": "CVE-2017-4017"},"source": {"advisory": "GHSA-v8x6-59g4-5g3w"}})
+    ['CVE-2017-4017', 'GHSA-v8x6-59g4-5g3w']
+    """
+    cve_data_meta = cve.get("CVE_data_meta") or {}
+    alias = cve_data_meta.get("ID")
+
+    source = cve.get("source") or {}
+    advisory = source.get("advisory")
+
+    aliases = []
+    if alias:
+        aliases.append(alias)
+    if advisory:
+        aliases.append(advisory)
+    return aliases
+
+
+def get_published_date_nvd_nist_gov(nvd_nist_gov):
+    """
+    Returns a published datetime
+    >>> get_published_date_nvd_nist_gov({"publishedDate": "2022-06-23T07:15Z"})
+    datetime.datetime(2022, 6, 23, 7, 15, tzinfo=<StaticTzInfo 'Z'>)
+    """
+    published_date = nvd_nist_gov.get("publishedDate")
+    return published_date and dateparser.parse(published_date)
+
+
+def get_cpe(nodes) -> List:
+    """
+    >>> get_cpe([{"children": [], "cpe_match": [{
+    ...                          "cpe23Uri": "cpe:2.3:a:mutt:mutt:*:*:*:*:*:*:*:*",
+    ...                          "cpe_name": [],
+    ...                          "versionEndIncluding": "1.2.5.1",
+    ...                          "vulnerable": True
+    ...                   },{
+    ...                          "cpe23Uri": "cpe:2.3:a:mutt:mutt:*:*:*:*:*:*:*:*",
+    ...                          "cpe_name": [],
+    ...                          "versionEndIncluding": "1.3.25",
+    ...                          "vulnerable": True
+    ...                   }],"operator": "OR"}])
+    ['cpe:2.3:a:mutt:mutt:*:*:*:*:*:*:*:*', 'cpe:2.3:a:mutt:mutt:*:*:*:*:*:*:*:*']
+    """
+    cpe_list = []
+    for node in nodes:
+        cpe_match = node.get("cpe_match") or []
+        for cpe23Uri in cpe_match:
+            cpe_uri = cpe23Uri.get("cpe23Uri")
+            if cpe_uri:
+                cpe_list.append(cpe_uri)
+    return cpe_list
diff --git a/vulnerabilities/tests/test_data/gsd/GSD-2002-0001-expected.json b/vulnerabilities/tests/test_data/gsd/GSD-2002-0001-expected.json
@@ -0,0 +1,105 @@
+{
+  "aliases": [
+    "CVE-2002-0001",
+    "GSD-2002-0001"
+  ],
+  "summary": "Vulnerability in RFC822 address parser in mutt before 1.2.5.1 and mutt 1.3.x before 1.3.25 allows remote attackers to execute arbitrary commands via an improperly terminated comment or phrase in the address list.",
+  "affected_packages": [
+
+  ],
+  "references": [
+    {
+      "reference_id": "",
+      "reference_type" : "",
+      "url": "http://online.securityfocus.com/advisories/3778",
+      "severities": [
+
+      ]
+    },
+    {
+      "reference_id": "",
+      "reference_type" : "",
+      "url": "ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:04.mutt.asc",
+      "severities": [
+
+      ]
+    },
+    {
+      "reference_id": "",
+      "reference_type" : "",
+      "url": "http://www.debian.org/security/2002/dsa-096",
+      "severities": [
+
+      ]
+    },
+    {
+      "reference_id": "",
+      "reference_type" : "",
+      "url": "http://www.mutt.org/announce/mutt-1.2.5.1-1.3.25.html",
+      "severities": [
+
+      ]
+    },
+    {
+      "reference_id": "",
+      "reference_type" : "",
+      "url": "http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000449",
+      "severities": [
+
+      ]
+    },
+    {
+      "reference_id": "",
+      "reference_type" : "",
+      "url": "http://www.iss.net/security_center/static/7759.php",
+      "severities": [
+
+      ]
+    },
+    {
+      "reference_id": "",
+      "reference_type" : "",
+      "url": "http://www.securityfocus.com/bid/3774",
+      "severities": [
+
+      ]
+    },
+    {
+      "reference_id": "",
+      "reference_type" : "",
+      "url": "ftp://ftp.caldera.com/pub/security/OpenLinux/CSSA-2002-002.0.txt",
+      "severities": [
+
+      ]
+    },
+    {
+      "reference_id": "",
+      "reference_type" : "",
+      "url": "http://www.novell.com/linux/security/advisories/2002_001_mutt_txt.html",
+      "severities": [
+
+      ]
+    },
+    {
+      "reference_id": "",
+      "reference_type" : "",
+      "url": "http://marc.info/?l=bugtraq&m=100994648918287&w=2",
+      "severities": [
+
+      ]
+    },
+    {
+      "reference_id": "",
+      "reference_type" : "",
+      "url": "http://www.redhat.com/support/errata/RHSA-2002-003.html",
+      "severities": [
+
+      ]
+    }
+  ],
+  "date_published": "2002-02-27T05:00:00+00:00",
+  "weaknesses": [
+
+  ],
+  "url": ""
+}