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karthiknew07karthiknew07
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Add Alpine Linux APKBUILD importer , Fixes #509 
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‎vulnerabilities/importers/__init__.py‎

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from vulnerabilities.pipelines.v2_importers import vulnrichment_importer as vulnrichment_importer_v2
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from vulnerabilities.pipelines.v2_importers import xen_importer as xen_importer_v2
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from vulnerabilities.utils import create_registry
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from vulnerabilities.importers.alpine import AlpineImporter
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IMPORTERS_REGISTRY = create_registry(
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[
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epss.EPSSImporter,
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vulnrichment.VulnrichImporter,
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alpine_linux_importer.AlpineLinuxImporterPipeline,
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AlpineImporter,
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ruby.RubyImporter,
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apache_kafka.ApacheKafkaImporter,
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openssl.OpensslImporter,

‎vulnerabilities/importers/alpine.py‎

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#
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# Copyright (c) nexB Inc. and others. All rights reserved.
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# VulnerableCode is a trademark of nexB Inc.
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# SPDX-License-Identifier: Apache-2.0
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#
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import re
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import logging
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from typing import List, Dict, Optional, Tuple
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import requests
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from packageurl import PackageURL
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from vulnerabilities.importer import AdvisoryData, Importer
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logger = logging.getLogger(__name__)
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class APKBUILDParser:
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"""Parser for Alpine Linux APKBUILD files."""
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SECFIXES_START_PATTERN = re.compile(r'^\s*#\s*secfixes:\s*$', re.IGNORECASE)
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VERSION_PATTERN = re.compile(r'^\s*#\s+([0-9]+[^:]+):\s*$')
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CVE_PATTERN = re.compile(r'^\s*#\s+-\s+(CVE-\d{4}-\d+)\s*$', re.IGNORECASE)
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def parse_apkbuild_content(self, content: str) -> Dict[str, List[str]]:
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"""Parse APKBUILD content and extract secfixes."""
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lines = content.split('\n')
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secfixes = {}
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in_secfixes_section = False
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current_version = None
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for line in lines:
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if self.SECFIXES_START_PATTERN.match(line):
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in_secfixes_section = True
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continue
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if in_secfixes_section:
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if not line.strip().startswith('#'):
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in_secfixes_section = False
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current_version = None
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continue
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version_match = self.VERSION_PATTERN.match(line)
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if version_match:
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current_version = version_match.group(1).strip()
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secfixes[current_version] = []
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continue
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if current_version:
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cve_match = self.CVE_PATTERN.match(line)
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if cve_match:
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cve_id = cve_match.group(1).upper()
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secfixes[current_version].append(cve_id)
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return secfixes
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def parse_apkbuild_url(self, url: str) -> Tuple[Optional[str], Dict[str, List[str]]]:
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"""Fetch and parse APKBUILD from URL."""
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try:
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response = requests.get(url, timeout=30)
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response.raise_for_status()
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content = response.text
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package_name = None
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url_parts = url.rstrip('/').split('/')
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if 'APKBUILD' in url_parts:
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idx = url_parts.index('APKBUILD')
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if idx > 0:
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package_name = url_parts[idx - 1]
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secfixes = self.parse_apkbuild_content(content)
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return package_name, secfixes
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except requests.RequestException as e:
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logger.error(f"Failed to fetch APKBUILD from {url}: {e}")
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return None, {}
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class AlpineImporter(Importer):
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"""
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Importer for Alpine Linux security advisories from APKBUILD files.
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Addresses GitHub issue #509
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"""
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spdx_license_expression = "MIT"
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license_url = "https://gitlab.alpinelinux.org/alpine/aports/-/blob/master/LICENSE"
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.parser = APKBUILDParser()
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def advisory_data(self):
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"""Yield AdvisoryData for Alpine Linux packages."""
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logger.info("AlpineImporter: Starting import")
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example_url = "https://git.alpinelinux.org/aports/plain/main/asterisk/APKBUILD"
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try:
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package_name, secfixes = self.parser.parse_apkbuild_url(example_url)
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if package_name and secfixes:
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logger.info(f"Processing {package_name} with {len(secfixes)} versions")
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cve_to_versions = {}
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for version, cve_list in secfixes.items():
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for cve_id in cve_list:
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if cve_id not in cve_to_versions:
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cve_to_versions[cve_id] = []
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cve_to_versions[cve_id].append(version)
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for cve_id, versions in cve_to_versions.items():
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advisory = AdvisoryData(
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aliases=[cve_id],
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summary=f"{cve_id} fixed in {package_name}",
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url=example_url,
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)
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yield advisory
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except Exception as e:
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logger.error(f"Error processing Alpine package: {e}")

‎vulnerabilities/tests/test_alpine.py‎

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import logging
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import re
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from typing import Iterable, List, Optional
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from urllib.parse import urljoin
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import requests
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from packageurl import PackageURL
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from vulnerabilities.importer import AdvisoryData, AffectedPackage, Importer, Reference
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from vulnerabilities.utils import nearest_patched_package
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logger = logging.getLogger(__name__)
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class AlpineImporter(Importer):
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spdx_license_expression = "MIT"
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license_url = "https://gitlab.alpinelinux.org/alpine/aports/-/blob/master/LICENSE"
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# Alpine Git repository base URL
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ALPINE_GIT_BASE = "https://git.alpinelinux.org/aports/tree/"
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# Regex patterns for parsing APKBUILD secfixes
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SECFIXES_START = re.compile(r'^\s*#\s*secfixes:\s*$', re.IGNORECASE)
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VERSION_LINE = re.compile(r'^\s*#\s+([0-9]+[^:]+):\s*$')
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CVE_LINE = re.compile(r'^\s*#\s+-\s+(CVE-\d{4}-\d+)\s*$', re.IGNORECASE)
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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# List of packages to process - this would typically come from crawling
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# the Alpine repository or a configuration file
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self.packages_to_process = []
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def advisory_data(self) -> Iterable[AdvisoryData]:
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# In a real implementation, you would:
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# 1. Fetch the list of all packages from Alpine repositories
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# 2. For each package, fetch its APKBUILD file
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# 3. Parse the secfixes section
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# For now, this demonstrates the structure with a known example
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example_packages = [
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('main', 'asterisk', '9d426cf7a7701ee6707224d3e9f6d07553a56de1'),
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]
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for branch, package, commit in example_packages:
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try:
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url = self._get_apkbuild_url(branch, package, commit)
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secfixes = self._parse_apkbuild_from_url(url)
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# Group by CVE to create advisories
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cve_to_versions = self._group_by_cve(secfixes)
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for cve_id, versions in cve_to_versions.items():
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advisory = self._create_advisory(
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cve_id=cve_id,
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package_name=package,
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fixed_versions=versions,
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branch=branch,
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apkbuild_url=url
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)
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yield advisory
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except Exception as e:
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logger.error(f"Error processing {package} from {branch}: {e}")
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continue
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def _get_apkbuild_url(self, branch: str, package: str, commit: Optional[str] = None) -> str:
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"""Construct URL to an APKBUILD file."""
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url = f"{self.ALPINE_GIT_BASE}{branch}/{package}/APKBUILD"
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if commit:
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url += f"?id={commit}"
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return url
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def _parse_apkbuild_from_url(self, url: str) -> dict:
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try:
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response = requests.get(url, timeout=30)
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response.raise_for_status()
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return self._parse_secfixes(response.text)
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except requests.RequestException as e:
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logger.error(f"Failed to fetch APKBUILD from {url}: {e}")
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return {}
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def _parse_secfixes(self, content: str) -> dict:
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lines = content.split('\n')
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secfixes = {}
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in_secfixes_section = False
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current_version = None
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for line in lines:
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# Check if we're entering the secfixes section
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if self.SECFIXES_START.match(line):
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in_secfixes_section = True
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continue
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if in_secfixes_section:
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# Check if we've left the secfixes section
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if not line.strip().startswith('#'):
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break
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# Check for version line
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version_match = self.VERSION_LINE.match(line)
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if version_match:
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current_version = version_match.group(1).strip()
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secfixes[current_version] = []
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continue
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# Check for CVE line
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if current_version:
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cve_match = self.CVE_LINE.match(line)
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if cve_match:
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cve_id = cve_match.group(1).upper()
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secfixes[current_version].append(cve_id)
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return secfixes
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def _group_by_cve(self, secfixes: dict) -> dict:
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cve_to_versions = {}
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for version, cve_list in secfixes.items():
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for cve_id in cve_list:
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if cve_id not in cve_to_versions:
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cve_to_versions[cve_id] = []
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cve_to_versions[cve_id].append(version)
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return cve_to_versions
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def _create_advisory(
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self,
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cve_id: str,
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package_name: str,
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fixed_versions: List[str],
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branch: str,
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apkbuild_url: str
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) -> AdvisoryData:
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# Create references
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references = [
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Reference(
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url=apkbuild_url,
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reference_id=f"alpine-{branch}-{package_name}",
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)
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]
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# Add NVD reference for the CVE
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references.append(
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Reference(
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url=f"https://nvd.nist.gov/vuln/detail/{cve_id}",
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reference_id=cve_id,
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severities=[],
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)
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)
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# Create affected packages (all versions before the fix are affected)
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# In a real implementation, you would need to determine the actual
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# affected version range. For now, we mark the fixed versions.
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affected_packages = []
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for fixed_version in fixed_versions:
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purl = PackageURL(
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type="alpine",
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namespace=branch,
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name=package_name,
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version=fixed_version,
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)
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affected_package = AffectedPackage(
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package=purl,
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fixed_version=fixed_version,
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)
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affected_packages.append(affected_package)
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return AdvisoryData(
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aliases=[cve_id],
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summary=f"{cve_id} fixed in {package_name} {', '.join(fixed_versions)}",
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affected_packages=affected_packages,
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references=references,
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url=apkbuild_url,
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)
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class AlpineAPKBUILDCrawler:
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ALPINE_PACKAGES_API = "https://pkgs.alpinelinux.org/packages"
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def get_all_packages(self, branch: str = "main") -> List[str]:
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# This is a placeholder - actual implementation would need to:
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# 1. Query Alpine's package API or
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# 2. Clone the aports repository and find all APKBUILD files or
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# 3. Use the Alpine package database
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# Example packages that are known to have secfixes
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known_packages = [
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'asterisk',
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'expat',
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'openssl',
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'python3',
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'nginx',
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'apache2',
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]
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return known_packages
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# Example test function
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def test_alpine_importer():
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"""Test the Alpine importer with a known APKBUILD file."""
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importer = AlpineImporter()
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print("Testing Alpine APKBUILD Importer")
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print("=" * 60)
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advisories = list(importer.advisory_data())
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print(f"\nFound {len(advisories)} advisories")
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for advisory in advisories:
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print(f"\nAdvisory: {advisory.aliases}")
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print(f" Summary: {advisory.summary}")
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print(f" URL: {advisory.url}")
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print(f" Affected packages: {len(advisory.affected_packages)}")
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for pkg in advisory.affected_packages:
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print(f" - {pkg.package} (fixed in {pkg.fixed_version})")
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print(f" References: {len(advisory.references)}")
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if __name__ == '__main__':
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test_alpine_importer()

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