def check_latest_version(): """Checks for the latest version available at PyPI.""" name: str = "cve-bin-tool" url: str = f"https://pypi.org/pypi/{name}/json" try: with request.urlopen(url) as resp: # nosec - static url above package_json = json.load(resp) pypi_version = package_json["info"]["version"] if pypi_version != VERSION: LOGGER.info( f"[bold red]You are running version {VERSION} of {name} but the latest PyPI Version is {pypi_version}.[/]", extra={"markup": True}, ) if version.parse(VERSION) < version.parse(pypi_version): LOGGER.info( "[bold yellow]Alert: We recommend using the latest stable release.[/]", extra={"markup": True}, ) except Exception as error: LOGGER.warning( textwrap.dedent( f""" -------------------------- Can't check for the latest version --------------------------- warning: unable to access 'https://pypi.org/pypi/{name}' Exception details: {error} Please make sure you have a working internet connection or try again later. """ ) )
def check_latest_version(): """Checks for the latest version available at PyPI.""" name = "cve-bin-tool" url = f"https://pypi.org/pypi/{name}/json" try: with request.urlopen(url) as resp: package_json = json.load(resp) pypi_version = package_json["info"]["version"] if pypi_version == VERSION: LOGGER.info( textwrap.dedent(""" ********************************************************* Yay! you are running the latest version. But you can try the latest development version at GitHub. URL: https://github.com/intel/cve-bin-tool ********************************************************* """)) else: # TODO In future mark me with some color ( prefer yellow or red ) LOGGER.info( f"You are running version {VERSION} of {name} but the latest PyPI Version is {pypi_version}." ) if version.parse(VERSION) < version.parse(pypi_version): LOGGER.info( "Alert: We recommend using the latest stable release.") except Exception as error: LOGGER.warning( textwrap.dedent(f""" -------------------------- Can't check for the latest version --------------------------- warning: unable to access 'https://pypi.org/pypi/{name}' Exception details: {error} Please make sure you have a working internet connection or try again later. """))
def find_vendor_product(self): """find vendor-product pairs from database""" LOGGER.debug( f"checking for product_name='{self.product_name}' and version_name='{self.version_number}' in the database" ) CVEDB.db_open(self) cursor = self.connection.cursor() # finding out all distinct (vendor, product) pairs with the help of product_name query = """ SELECT distinct vendor, product FROM cve_range WHERE product=(:product); """ cursor.execute(query, {"product": self.product_name}) data = cursor.fetchall() # checking if (vendor, product) was found in the database if data: # warning the user to select the vendor-product pairs manually if multiple pairs are found if len(data) != 1: LOGGER.warning( textwrap.dedent(f""" =============================================================== Multiple ("vendor", "product") pairs found for "{self.product_name}" Please manually select the appropriate pair. =============================================================== """)) return data # [('vendor', 'product')] else: if self.product_name: # removing numeric characters from the product_name if any(char.isdigit() for char in self.product_name): LOGGER.debug( f"removing digits from product_name={self.product_name}" ) self.product_name = "".join( filter(lambda x: not x.isdigit(), self.product_name)) return self.find_vendor_product() else: # raise error and ask for product_name LOGGER.warning( textwrap.dedent(f""" ================================================================= No match was found for "{self.product_name}" in database. Please check your file or try specifying the "product_name" also. ================================================================= """)) return [] CVEDB.db_close(self)
def scan_and_or_extract_file(self, ectx, filepath): """ Runs extraction if possible and desired otherwise scans.""" # Scan the file yield from self.scan_file(filepath) # Attempt to extract the file and scan the contents if ectx.can_extract(filepath): if not self.should_extract: LOGGER.warning( f"{filepath} is an archive. Pass -x option to auto-extract" ) return None for filename in self.walker([ectx.extract(filepath)]): clean_path = self.clean_file_path(filename) self.file_stack.append(f" contains {clean_path}") yield from self.scan_and_or_extract_file(ectx, filename) self.file_stack.pop()
def main(argv=None): """Scan a binary file for certain open source libraries that may have CVEs""" argv = argv or sys.argv # Reset logger level to info LOGGER.setLevel(logging.INFO) parser = argparse.ArgumentParser( prog="cve-bin-tool", description=textwrap.dedent(""" The CVE Binary Tool scans for a number of common, vulnerable open source components (openssl, libpng, libxml2, expat and a few others) to let you know if a given directory or binary file includes common libraries with known vulnerabilities. """), epilog=textwrap.fill( f'Available checkers: {", ".join(VersionScanner.available_checkers())}' ) + "\n\nPlease disclose issues responsibly!", formatter_class=argparse.RawDescriptionHelpFormatter, ) input_group = parser.add_argument_group("Input") input_group.add_argument("directory", help="directory to scan", nargs="?", default=None) input_group.add_argument( "-e", "--exclude", action=StringToListAction, help="Comma separated Exclude directory path", default=None, ) input_group.add_argument( "-i", "--input-file", action="store", default="", help="provide input filename", ) input_group.add_argument("-C", "--config", action="store", default="", help="provide config file") output_group = parser.add_argument_group("Output") output_group.add_argument("-q", "--quiet", action="store_true", help="suppress output") output_group.add_argument( "-l", "--log", help="log level (default: info)", dest="log_level", action="store", choices=["debug", "info", "warning", "error", "critical"], ) output_group.add_argument( "-o", "--output-file", action="store", help="provide output filename (default: output to stdout)", ) output_group.add_argument( "--html-theme", action="store", help="provide custom theme directory for HTML Report", ) output_group.add_argument( "-f", "--format", action="store", choices=["csv", "json", "console", "html", "pdf"], help="update output format (default: console)", ) output_group.add_argument( "-c", "--cvss", action="store", help= "minimum CVSS score (as integer in range 0 to 10) to report (default: 0)", ) output_group.add_argument( "-S", "--severity", action="store", choices=["low", "medium", "high", "critical"], help="minimum CVE severity to report (default: low)", ) parser.add_argument("-V", "--version", action="version", version=VERSION) parser.add_argument( "-u", "--update", action="store", choices=["now", "daily", "never", "latest"], help="update schedule for NVD database (default: daily)", ) parser.add_argument( "-x", "--extract", action="store_true", help="autoextract compressed files", ) parser.add_argument( "--disable-version-check", action="store_true", help="skips checking for a new version", ) checker_group = parser.add_argument_group("Checkers") checker_group.add_argument( "-s", "--skips", dest="skips", action=StringToListAction, type=str, help="comma-separated list of checkers to disable", ) checker_group.add_argument( "-r", "--runs", dest="runs", action=StringToListAction, type=str, help="comma-separated list of checkers to enable", ) defaults = { "directory": "", "exclude": [], "input_file": "", "log_level": "info", "format": "console", "cvss": 0, "severity": "low", "update": "daily", "extract": True, "disable_version_check": False, "skips": "", "runs": "", "quiet": False, "output_file": "", "html_theme": "", } with ErrorHandler(mode=ErrorMode.NoTrace): raw_args = parser.parse_args(argv[1:]) args = {key: value for key, value in vars(raw_args).items() if value} configs = {} if args.get("config"): conf = ConfigParser(args["config"]) configs = conf.parse_config() args = ChainMap(args, configs, defaults) # logging and error related settings if args["log_level"]: LOGGER.setLevel(args["log_level"].upper()) if args["quiet"]: LOGGER.setLevel(logging.CRITICAL) if 0 < LOGGER.level <= 10: error_mode = ErrorMode.FullTrace elif LOGGER.level >= 50: error_mode = ErrorMode.NoTrace else: error_mode = ErrorMode.TruncTrace if platform.system() != "Linux": warning_nolinux = """ ********************************************** Warning: this utility was developed for Linux. You may need to install additional utilities to use it on other operating systems. ********************************************** """ LOGGER.warning(warning_nolinux) # Database update related settings # Connect to the database cvedb_orig = CVEDB(version_check=not args["disable_version_check"], error_mode=error_mode) # if OLD_CACHE_DIR (from cvedb.py) exists, print warning if os.path.exists(OLD_CACHE_DIR): LOGGER.warning( f"Obsolete cache dir {OLD_CACHE_DIR} is no longer needed and can be removed." ) # Clear data if -u now is set if args["update"] == "now": cvedb_orig.clear_cached_data() if args["update"] == "latest": cvedb_orig.refresh_cache_and_update_db() # update db if needed if args["update"] != "never": cvedb_orig.get_cvelist_if_stale() else: LOGGER.warning("Not verifying CVE DB cache") if not cvedb_orig.nvd_years(): with ErrorHandler(mode=error_mode, logger=LOGGER): raise EmptyCache(cvedb_orig.cachedir) # CVE Database validation if not cvedb_orig.check_cve_entries(): with ErrorHandler(mode=error_mode, logger=LOGGER): raise CVEDataMissing("No data in CVE Database") # Input validation if not args["directory"] and not args["input_file"]: parser.print_usage() with ErrorHandler(logger=LOGGER, mode=ErrorMode.NoTrace): raise InsufficientArgs( "Please specify a directory to scan or an input file required") if args["directory"] and not os.path.exists(args["directory"]): parser.print_usage() with ErrorHandler(logger=LOGGER, mode=ErrorMode.NoTrace): raise FileNotFoundError("Directory/File doesn't exist") # Checkers related settings skips = args["skips"] if args["runs"]: runs = args["runs"] skips = list( map( lambda checker: checker.name, filter( lambda checker: checker.name not in runs, pkg_resources.iter_entry_points("cve_bin_tool.checker"), ), )) # CSVScanner related settings score = 0 if args["severity"]: # Set minimum CVSS score based on severity cvss_score = {"low": 0, "medium": 4, "high": 7, "critical": 9} score = cvss_score[args["severity"]] if int(args["cvss"]) > 0: score = int(args["cvss"]) with CVEScanner(score=score) as cve_scanner: triage_data: TriageData total_files: int = 0 parsed_data: Dict[ProductInfo, TriageData] = {} if args["input_file"]: input_engine = InputEngine(args["input_file"], logger=LOGGER, error_mode=error_mode) parsed_data = input_engine.parse_input() if not args["directory"]: for product_info, triage_data in parsed_data.items(): LOGGER.warning(f"{product_info}, {triage_data}") cve_scanner.get_cves(product_info, triage_data) if args["directory"]: version_scanner = VersionScanner( should_extract=args["extract"], exclude_folders=args["exclude"], error_mode=error_mode, ) version_scanner.remove_skiplist(skips) version_scanner.print_checkers() for scan_info in version_scanner.recursive_scan(args["directory"]): if scan_info: product_info, path = scan_info LOGGER.debug(f"{product_info}: {path}") triage_data = parsed_data.get(product_info, {"default": {}}) # Ignore paths from triage_data if we are scanning directory triage_data["paths"] = {path} cve_scanner.get_cves(product_info, triage_data) total_files = version_scanner.total_scanned_files LOGGER.info("") LOGGER.info("Overall CVE summary: ") if args["input_file"]: LOGGER.info( f"There are {cve_scanner.products_with_cve} products with known CVEs detected" ) else: LOGGER.info( f"There are {cve_scanner.products_with_cve} files with known CVEs detected" ) if cve_scanner.products_with_cve > 0 or (args["format"] == "html" or args["format"] == "pdf"): affected_string = ", ".join( map( lambda product_version: "".join(str(product_version)), cve_scanner.affected(), )) LOGGER.info(f"Known CVEs in {affected_string}:") # Creates a Object for OutputEngine output = OutputEngine( all_cve_data=cve_scanner.all_cve_data, scanned_dir=args["directory"], filename=args["output_file"], themes_dir=args["html_theme"], products_with_cve=cve_scanner.products_with_cve, products_without_cve=cve_scanner.products_without_cve, total_files=total_files, ) if not args["quiet"]: output.output_file(args["format"]) # Use the number of products with known cves as error code # as requested by folk planning to automate use of this script. # If no cves found, then the program exits cleanly. return cve_scanner.products_with_cve
def parse_list(self): input_file = self.input_file self.check_file() if not input_file.endswith("requirements.txt"): if distro.id() not in SUPPORTED_DISTROS: LOGGER.warning( f"Package list support only available on {','.join(SUPPORTED_DISTROS)}!" ) return {} system_packages = [] LOGGER.info(f"Scanning {distro.id().capitalize()} package list.") if distro.id() in DEB_DISTROS: installed_packages = run( [ "dpkg-query", "--show", '--showformat={"name": "${binary:Package}", "version": "${Version}"}, ', ], stdout=PIPE, ) installed_packages = json.loads( f"[{installed_packages.stdout.decode('utf-8')[0:-2]}]") elif distro.id() in RPM_DISTROS: installed_packages = run( [ "rpm", "--query", "--all", "--queryformat", '{"name": "%{NAME}", "version": "%{VERSION}"\\}, ', ], stdout=PIPE, ) installed_packages = json.loads( f"[{installed_packages.stdout.decode('utf-8')[0:-2]}]") elif distro.id() in PACMAN_DISTROS: installed_packages = [] installed_packages_output = run( ["pacman", "--query", "--explicit"], stdout=PIPE, ) installed_packages_output = installed_packages_output.stdout.decode( "utf-8").splitlines() dict_keys = ["name", "version"] for installed_package in installed_packages_output: package_details = installed_package.split(" ") installed_package_dict = dict( zip(dict_keys, package_details)) installed_packages.append(installed_package_dict) with open(input_file) as req: lines = req.readlines() for line in lines: system_packages.append(re.split("\n", line)[0]) for installed_package in installed_packages: if installed_package["name"] in system_packages: self.package_names_without_vendor.append(installed_package) else: LOGGER.info("Scanning python package list.") txt_package_names = [] installed_packages_json = run( ["pip", "list", "--format", "json"], stdout=PIPE, ) installed_packages = json.loads( installed_packages_json.stdout.decode("utf-8")) with open(input_file) as txtfile: lines = txtfile.readlines() for line in lines: txt_package_names.append(re.split(">|\\[|;|=|\n", line)[0]) for installed_package in installed_packages: package_name = installed_package["name"].lower() if package_name in txt_package_names: self.package_names_without_vendor.append( installed_package) cve_db = CVEDB() vendor_package_pairs = cve_db.get_vendor_product_pairs( self.package_names_without_vendor) self.add_vendor(vendor_package_pairs) self.parse_data() return self.parsed_data_with_vendor
def check_file(self): input_file = self.input_file error_mode = self.error_mode if not isfile(input_file): with ErrorHandler(mode=error_mode): raise FileNotFoundError(input_file) if getsize(input_file) == 0: with ErrorHandler(mode=error_mode): raise EmptyTxtError(input_file) if not input_file.endswith(".txt"): with ErrorHandler(mode=error_mode): raise InvalidListError( "Invalid Package list file format (should be .txt)") if not input_file.endswith("requirements.txt"): if distro.id() not in SUPPORTED_DISTROS: LOGGER.warning( f"Package list support only available for {','.join(SUPPORTED_DISTROS)}!" ) with ErrorHandler(mode=error_mode): raise InvalidListError( f"{distro.id().capitalize()} is not supported") elif distro.id() in DEB_DISTROS: # Simulate installation on Debian based system using apt-get to check if the file is valid output = run( ["xargs", "-a", input_file, "apt-get", "install", "-s"], capture_output=True, ) if output.returncode != 0: invalid_packages = re.findall( r"E: Unable to locate package (.+)", output.stderr.decode("utf-8"), ) LOGGER.warning( f"Invalid Package found: {','.join(invalid_packages)}") elif distro.id() in RPM_DISTROS: output = run( ["xargs", "-a", input_file, "rpm", "-qi"], capture_output=True, ) not_installed_packages = re.findall( r"package (.+) is not installed", output.stdout.decode("utf-8")) if not_installed_packages: LOGGER.warning( f"The packages {','.join(not_installed_packages)} seems to be not installed.\nIt is either an invalid package or not installed.\nUse `sudo yum install $(cat package-list)` to install all packages" ) elif distro.id() in PACMAN_DISTROS: output = run( ["xargs", "-a", input_file, "pacman", "-Qk"], capture_output=True, ) not_installed_packages = re.findall( r"error: package '(.+)' was not found", output.stderr.decode("utf-8"), ) if not_installed_packages: LOGGER.warning( f"The packages {','.join(not_installed_packages)} seems to be not installed.\nIt is either an invalid package or not installed.\nUse `sudo pacman -S $(cat package-list)` to install all packages" ) else: # TODO: Replace below error handling with a proper pip install dry run # See: https://github.com/pypa/pip/issues/53 with ErrorHandler(mode=error_mode): raise InvalidListError("Invalid Package list")