From 731e27f75eb513a064d9b074ed14497b40ffc729 Mon Sep 17 00:00:00 2001 From: Pierre Le Magourou Date: Wed, 6 Nov 2019 17:37:36 +0200 Subject: cve-update-db-native: Remove hash column from database. djb2 hash algorithm was found to do collisions, so the database was sometime missing data. Remove this hash mechanism, clear and populate elements from scratch in PRODUCTS table if the current year needs an update. (From OE-Core rev: 78de2cb39d74b030cd4ec811bf6f9a6daa003d19) (From OE-Core rev: e6541c6add1714938a81cca394886893cf24cdb0) Signed-off-by: Pierre Le Magourou Signed-off-by: Richard Purdie --- meta/classes/cve-check.bbclass | 12 ++++++------ meta/recipes-core/meta/cve-update-db-native.bb | 21 +++++++-------------- 2 files changed, 13 insertions(+), 20 deletions(-) diff --git a/meta/classes/cve-check.bbclass b/meta/classes/cve-check.bbclass index 512d4c7302..c00d2910be 100644 --- a/meta/classes/cve-check.bbclass +++ b/meta/classes/cve-check.bbclass @@ -26,7 +26,7 @@ CVE_PRODUCT ??= "${BPN}" CVE_VERSION ??= "${PV}" CVE_CHECK_DB_DIR ?= "${DL_DIR}/CVE_CHECK" -CVE_CHECK_DB_FILE ?= "${CVE_CHECK_DB_DIR}/nvdcve.db" +CVE_CHECK_DB_FILE ?= "${CVE_CHECK_DB_DIR}/nvdcve_1.0.db" CVE_CHECK_LOG ?= "${T}/cve.log" CVE_CHECK_TMP_FILE ?= "${TMPDIR}/cve_check" @@ -200,11 +200,11 @@ def check_cves(d, patched_cves): c.execute("SELECT * FROM PRODUCTS WHERE PRODUCT IS ?", (product,)) for row in c: - cve = row[1] - version_start = row[4] - operator_start = row[5] - version_end = row[6] - operator_end = row[7] + cve = row[0] + version_start = row[3] + operator_start = row[4] + version_end = row[5] + operator_end = row[6] if cve in cve_whitelist: bb.note("%s-%s has been whitelisted for %s" % (product, pv, cve)) diff --git a/meta/recipes-core/meta/cve-update-db-native.bb b/meta/recipes-core/meta/cve-update-db-native.bb index cd270443b1..af2946b5f8 100644 --- a/meta/recipes-core/meta/cve-update-db-native.bb +++ b/meta/recipes-core/meta/cve-update-db-native.bb @@ -25,7 +25,7 @@ python do_populate_cve_db() { YEAR_START = 2002 db_dir = d.getVar("DL_DIR") + '/CVE_CHECK' - db_file = db_dir + '/nvdcve.db' + db_file = db_dir + '/nvdcve_1.0.db' json_tmpfile = db_dir + '/nvd.json.gz' proxy = d.getVar("https_proxy") cve_f = open(d.getVar("TMPDIR") + '/cve_check', 'a') @@ -60,6 +60,10 @@ python do_populate_cve_db() { c.execute("select DATE from META where YEAR = ?", (year,)) meta = c.fetchone() if not meta or meta[0] != last_modified: + # Clear products table entries corresponding to current year + cve_year = 'CVE-' + str(year) + '%' + c.execute("delete from PRODUCTS where ID like ?", (cve_year,)) + # Update db with current year json file req = urllib.request.Request(json_url) if proxy: @@ -86,27 +90,16 @@ python do_populate_cve_db() { conn.close() } -# DJB2 hash algorithm -def hash_djb2(s): - hash = 5381 - for x in s: - hash = (( hash << 5) + hash) + ord(x) - - return hash & 0xFFFFFFFF - 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 (HASH INTEGER UNIQUE, ID 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)") def insert_elt(c, db_values): - product_str = db_values[0] + db_values[1] + db_values[2] + db_values[3] - hashstr = hash_djb2(product_str) - db_values.insert(0, hashstr) - query = "insert or replace into PRODUCTS values (?, ?, ?, ?, ?, ?, ?, ?)" + query = "insert into PRODUCTS values (?, ?, ?, ?, ?, ?, ?)" c.execute(query, db_values) def parse_node_and_insert(c, node, cveId): -- cgit v1.2.3-54-g00ecf