diff options
Diffstat (limited to 'meta/recipes-core/meta/cve-update-db-native.bb')
-rw-r--r-- | meta/recipes-core/meta/cve-update-db-native.bb | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/meta/recipes-core/meta/cve-update-db-native.bb b/meta/recipes-core/meta/cve-update-db-native.bb deleted file mode 100644 index e5822cee58..0000000000 --- a/meta/recipes-core/meta/cve-update-db-native.bb +++ /dev/null @@ -1,229 +0,0 @@ -SUMMARY = "Updates the NVD CVE database" -LICENSE = "MIT" - -INHIBIT_DEFAULT_DEPS = "1" - -inherit native - -deltask do_unpack -deltask do_patch -deltask do_configure -deltask do_compile -deltask do_install -deltask do_populate_sysroot - -NVDCVE_URL ?= "https://nvd.nist.gov/feeds/json/cve/1.1/nvdcve-1.1-" - -python () { - if not bb.data.inherits_class("cve-check", d): - raise bb.parse.SkipRecipe("Skip recipe when cve-check class is not loaded.") -} - -python do_fetch() { - """ - Update NVD database with json data feed - """ - import bb.utils - import bb.progress - import sqlite3, urllib, urllib.parse, gzip - from datetime import date - - bb.utils.export_proxies(d) - - YEAR_START = 2002 - - db_file = d.getVar("CVE_CHECK_DB_FILE") - db_dir = os.path.dirname(db_file) - - if os.path.exists("{0}-journal".format(db_file)): - # If a journal is present the last update might have been interrupted. In that case, - # just wipe any leftovers and force the DB to be recreated. - os.remove("{0}-journal".format(db_file)) - - if os.path.exists(db_file): - os.remove(db_file) - - # Don't refresh the database more than once an hour - try: - import time - if time.time() - os.path.getmtime(db_file) < (60*60): - bb.debug(2, "Recently updated, skipping") - return - except OSError: - pass - - bb.utils.mkdirhier(db_dir) - - # Connect to database - conn = sqlite3.connect(db_file) - c = conn.cursor() - - initialize_db(c) - - with bb.progress.ProgressHandler(d) as ph, open(os.path.join(d.getVar("TMPDIR"), 'cve_check'), 'a') as cve_f: - total_years = date.today().year + 1 - YEAR_START - for i, year in enumerate(range(YEAR_START, date.today().year + 1)): - bb.debug(2, "Updating %d" % year) - ph.update((float(i + 1) / total_years) * 100) - year_url = (d.getVar('NVDCVE_URL')) + str(year) - meta_url = year_url + ".meta" - json_url = year_url + ".json.gz" - - # Retrieve meta last modified date - try: - response = urllib.request.urlopen(meta_url) - except urllib.error.URLError as e: - cve_f.write('Warning: CVE db update error, Unable to fetch CVE data.\n\n') - bb.warn("Failed to fetch CVE data (%s)" % e.reason) - return - - if response: - for l in response.read().decode("utf-8").splitlines(): - key, value = l.split(":", 1) - if key == "lastModifiedDate": - last_modified = value - break - else: - bb.warn("Cannot parse CVE metadata, update failed") - return - - # Compare with current db last modified date - c.execute("select DATE from META where YEAR = ?", (year,)) - meta = c.fetchone() - if not meta or meta[0] != last_modified: - bb.debug(2, "Updating entries") - # Clear products table entries corresponding to current year - c.execute("delete from PRODUCTS where ID like ?", ('CVE-%d%%' % year,)) - - # Update db with current year json file - try: - response = urllib.request.urlopen(json_url) - if response: - update_db(c, gzip.decompress(response.read()).decode('utf-8')) - c.execute("insert or replace into META values (?, ?)", [year, last_modified]) - except urllib.error.URLError as e: - cve_f.write('Warning: CVE db update error, CVE data is outdated.\n\n') - bb.warn("Cannot parse CVE data (%s), update failed" % e.reason) - return - else: - bb.debug(2, "Already up to date (last modified %s)" % last_modified) - # Update success, set the date to cve_check file. - if year == date.today().year: - cve_f.write('CVE database update : %s\n\n' % date.today()) - - conn.commit() - conn.close() -} - -do_fetch[lockfiles] += "${CVE_CHECK_DB_FILE_LOCK}" -do_fetch[file-checksums] = "" -do_fetch[vardeps] = "" - -def initialize_db(c): - c.execute("CREATE TABLE IF NOT EXISTS META (YEAR INTEGER UNIQUE, DATE TEXT)") - - c.execute("CREATE TABLE IF NOT EXISTS NVD (ID TEXT UNIQUE, SUMMARY TEXT, \ - SCOREV2 TEXT, SCOREV3 TEXT, MODIFIED INTEGER, VECTOR TEXT)") - - c.execute("CREATE TABLE IF NOT EXISTS PRODUCTS (ID TEXT, \ - VENDOR TEXT, PRODUCT TEXT, VERSION_START TEXT, OPERATOR_START TEXT, \ - VERSION_END TEXT, OPERATOR_END TEXT)") - c.execute("CREATE INDEX IF NOT EXISTS PRODUCT_ID_IDX on PRODUCTS(ID);") - -def parse_node_and_insert(c, node, cveId): - # Parse children node if needed - for child in node.get('children', ()): - parse_node_and_insert(c, child, cveId) - - def cpe_generator(): - for cpe in node.get('cpe_match', ()): - if not cpe['vulnerable']: - return - cpe23 = cpe.get('cpe23Uri') - if not cpe23: - return - cpe23 = cpe23.split(':') - if len(cpe23) < 6: - return - vendor = cpe23[3] - product = cpe23[4] - version = cpe23[5] - - if cpe23[6] == '*' or cpe23[6] == '-': - version_suffix = "" - else: - version_suffix = "_" + cpe23[6] - - if version != '*' and version != '-': - # Version is defined, this is a '=' match - yield [cveId, vendor, product, version + version_suffix, '=', '', ''] - elif version == '-': - # no version information is available - yield [cveId, vendor, product, version, '', '', ''] - else: - # Parse start version, end version and operators - op_start = '' - op_end = '' - v_start = '' - v_end = '' - - if 'versionStartIncluding' in cpe: - op_start = '>=' - v_start = cpe['versionStartIncluding'] - - if 'versionStartExcluding' in cpe: - op_start = '>' - v_start = cpe['versionStartExcluding'] - - if 'versionEndIncluding' in cpe: - op_end = '<=' - v_end = cpe['versionEndIncluding'] - - if 'versionEndExcluding' in cpe: - op_end = '<' - v_end = cpe['versionEndExcluding'] - - if op_start or op_end or v_start or v_end: - yield [cveId, vendor, product, v_start, op_start, v_end, op_end] - else: - # This is no version information, expressed differently. - # Save processing by representing as -. - yield [cveId, vendor, product, '-', '', '', ''] - - c.executemany("insert into PRODUCTS values (?, ?, ?, ?, ?, ?, ?)", cpe_generator()) - -def update_db(c, jsondata): - import json - root = json.loads(jsondata) - - for elt in root['CVE_Items']: - if not elt['impact']: - continue - - accessVector = None - cveId = elt['cve']['CVE_data_meta']['ID'] - cveDesc = elt['cve']['description']['description_data'][0]['value'] - date = elt['lastModifiedDate'] - try: - accessVector = elt['impact']['baseMetricV2']['cvssV2']['accessVector'] - cvssv2 = elt['impact']['baseMetricV2']['cvssV2']['baseScore'] - except KeyError: - cvssv2 = 0.0 - try: - accessVector = accessVector or elt['impact']['baseMetricV3']['cvssV3']['attackVector'] - cvssv3 = elt['impact']['baseMetricV3']['cvssV3']['baseScore'] - except KeyError: - accessVector = accessVector or "UNKNOWN" - cvssv3 = 0.0 - - c.execute("insert or replace into NVD values (?, ?, ?, ?, ?, ?)", - [cveId, cveDesc, cvssv2, cvssv3, date, accessVector]) - - configurations = elt['configurations']['nodes'] - for config in configurations: - parse_node_and_insert(c, config, cveId) - - -do_fetch[nostamp] = "1" - -EXCLUDE_FROM_WORLD = "1" |