diff options
Diffstat (limited to 'meta/recipes-core/meta')
-rw-r--r-- | meta/recipes-core/meta/cve-update-db-native.bb | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/meta/recipes-core/meta/cve-update-db-native.bb b/meta/recipes-core/meta/cve-update-db-native.bb new file mode 100644 index 0000000000..2c427a5884 --- /dev/null +++ b/meta/recipes-core/meta/cve-update-db-native.bb | |||
@@ -0,0 +1,195 @@ | |||
1 | SUMMARY = "Updates the NVD CVE database" | ||
2 | LICENSE = "MIT" | ||
3 | |||
4 | INHIBIT_DEFAULT_DEPS = "1" | ||
5 | |||
6 | inherit native | ||
7 | |||
8 | deltask do_unpack | ||
9 | deltask do_patch | ||
10 | deltask do_configure | ||
11 | deltask do_compile | ||
12 | deltask do_install | ||
13 | deltask do_populate_sysroot | ||
14 | |||
15 | python () { | ||
16 | if not d.getVar("CVE_CHECK_DB_FILE"): | ||
17 | raise bb.parse.SkipRecipe("Skip recipe when cve-check class is not loaded.") | ||
18 | } | ||
19 | |||
20 | python do_populate_cve_db() { | ||
21 | """ | ||
22 | Update NVD database with json data feed | ||
23 | """ | ||
24 | |||
25 | import sqlite3, urllib, urllib.parse, shutil, gzip | ||
26 | from datetime import date | ||
27 | |||
28 | BASE_URL = "https://nvd.nist.gov/feeds/json/cve/1.0/nvdcve-1.0-" | ||
29 | YEAR_START = 2002 | ||
30 | |||
31 | db_dir = os.path.join(d.getVar("DL_DIR"), 'CVE_CHECK') | ||
32 | db_file = os.path.join(db_dir, 'nvdcve_1.0.db') | ||
33 | json_tmpfile = os.path.join(db_dir, 'nvd.json.gz') | ||
34 | proxy = d.getVar("https_proxy") | ||
35 | |||
36 | if proxy: | ||
37 | # instantiate an opener but do not install it as the global | ||
38 | # opener unless if we're really sure it's applicable for all | ||
39 | # urllib requests | ||
40 | proxy_handler = urllib.request.ProxyHandler({'https': proxy}) | ||
41 | proxy_opener = urllib.request.build_opener(proxy_handler) | ||
42 | else: | ||
43 | proxy_opener = None | ||
44 | |||
45 | cve_f = open(os.path.join(d.getVar("TMPDIR"), 'cve_check'), 'a') | ||
46 | |||
47 | if not os.path.isdir(db_dir): | ||
48 | os.mkdir(db_dir) | ||
49 | |||
50 | # Connect to database | ||
51 | conn = sqlite3.connect(db_file) | ||
52 | c = conn.cursor() | ||
53 | |||
54 | initialize_db(c) | ||
55 | |||
56 | for year in range(YEAR_START, date.today().year + 1): | ||
57 | year_url = BASE_URL + str(year) | ||
58 | meta_url = year_url + ".meta" | ||
59 | json_url = year_url + ".json.gz" | ||
60 | |||
61 | # Retrieve meta last modified date | ||
62 | |||
63 | response = None | ||
64 | |||
65 | if proxy_opener: | ||
66 | response = proxy_opener.open(meta_url) | ||
67 | else: | ||
68 | req = urllib.request.Request(meta_url) | ||
69 | response = urllib.request.urlopen(req) | ||
70 | |||
71 | if response: | ||
72 | for l in response.read().decode("utf-8").splitlines(): | ||
73 | key, value = l.split(":", 1) | ||
74 | if key == "lastModifiedDate": | ||
75 | last_modified = value | ||
76 | break | ||
77 | else: | ||
78 | bb.warn("Cannot parse CVE metadata, update failed") | ||
79 | return | ||
80 | |||
81 | # Compare with current db last modified date | ||
82 | c.execute("select DATE from META where YEAR = ?", (year,)) | ||
83 | meta = c.fetchone() | ||
84 | if not meta or meta[0] != last_modified: | ||
85 | # Clear products table entries corresponding to current year | ||
86 | c.execute("delete from PRODUCTS where ID like ?", ('CVE-%d%%' % year,)) | ||
87 | |||
88 | # Update db with current year json file | ||
89 | try: | ||
90 | if proxy_opener: | ||
91 | response = proxy_opener.open(json_url) | ||
92 | else: | ||
93 | req = urllib.request.Request(json_url) | ||
94 | response = urllib.request.urlopen(req) | ||
95 | |||
96 | if response: | ||
97 | update_db(c, gzip.decompress(response.read()).decode('utf-8')) | ||
98 | c.execute("insert or replace into META values (?, ?)", [year, last_modified]) | ||
99 | except urllib.error.URLError as e: | ||
100 | cve_f.write('Warning: CVE db update error, CVE data is outdated.\n\n') | ||
101 | bb.warn("Cannot parse CVE data (%s), update failed" % e.reason) | ||
102 | return | ||
103 | |||
104 | # Update success, set the date to cve_check file. | ||
105 | if year == date.today().year: | ||
106 | cve_f.write('CVE database update : %s\n\n' % date.today()) | ||
107 | |||
108 | cve_f.close() | ||
109 | conn.commit() | ||
110 | conn.close() | ||
111 | } | ||
112 | |||
113 | def initialize_db(c): | ||
114 | c.execute("CREATE TABLE IF NOT EXISTS META (YEAR INTEGER UNIQUE, DATE TEXT)") | ||
115 | c.execute("CREATE TABLE IF NOT EXISTS NVD (ID TEXT UNIQUE, SUMMARY TEXT, \ | ||
116 | SCOREV2 TEXT, SCOREV3 TEXT, MODIFIED INTEGER, VECTOR TEXT)") | ||
117 | c.execute("CREATE TABLE IF NOT EXISTS PRODUCTS (ID TEXT, \ | ||
118 | VENDOR TEXT, PRODUCT TEXT, VERSION_START TEXT, OPERATOR_START TEXT, \ | ||
119 | VERSION_END TEXT, OPERATOR_END TEXT)") | ||
120 | |||
121 | def parse_node_and_insert(c, node, cveId): | ||
122 | # Parse children node if needed | ||
123 | for child in node.get('children', ()): | ||
124 | parse_node_and_insert(c, child, cveId) | ||
125 | |||
126 | def cpe_generator(): | ||
127 | for cpe in node.get('cpe_match', ()): | ||
128 | if not cpe['vulnerable']: | ||
129 | return | ||
130 | cpe23 = cpe['cpe23Uri'].split(':') | ||
131 | vendor = cpe23[3] | ||
132 | product = cpe23[4] | ||
133 | version = cpe23[5] | ||
134 | |||
135 | if version != '*': | ||
136 | # Version is defined, this is a '=' match | ||
137 | yield [cveId, vendor, product, version, '=', '', ''] | ||
138 | else: | ||
139 | # Parse start version, end version and operators | ||
140 | op_start = '' | ||
141 | op_end = '' | ||
142 | v_start = '' | ||
143 | v_end = '' | ||
144 | |||
145 | if 'versionStartIncluding' in cpe: | ||
146 | op_start = '>=' | ||
147 | v_start = cpe['versionStartIncluding'] | ||
148 | |||
149 | if 'versionStartExcluding' in cpe: | ||
150 | op_start = '>' | ||
151 | v_start = cpe['versionStartExcluding'] | ||
152 | |||
153 | if 'versionEndIncluding' in cpe: | ||
154 | op_end = '<=' | ||
155 | v_end = cpe['versionEndIncluding'] | ||
156 | |||
157 | if 'versionEndExcluding' in cpe: | ||
158 | op_end = '<' | ||
159 | v_end = cpe['versionEndExcluding'] | ||
160 | |||
161 | yield [cveId, vendor, product, v_start, op_start, v_end, op_end] | ||
162 | |||
163 | c.executemany("insert into PRODUCTS values (?, ?, ?, ?, ?, ?, ?)", cpe_generator()) | ||
164 | |||
165 | def update_db(c, jsondata): | ||
166 | import json | ||
167 | root = json.loads(jsondata) | ||
168 | |||
169 | for elt in root['CVE_Items']: | ||
170 | if not elt['impact']: | ||
171 | continue | ||
172 | |||
173 | cveId = elt['cve']['CVE_data_meta']['ID'] | ||
174 | cveDesc = elt['cve']['description']['description_data'][0]['value'] | ||
175 | date = elt['lastModifiedDate'] | ||
176 | accessVector = elt['impact']['baseMetricV2']['cvssV2']['accessVector'] | ||
177 | cvssv2 = elt['impact']['baseMetricV2']['cvssV2']['baseScore'] | ||
178 | |||
179 | try: | ||
180 | cvssv3 = elt['impact']['baseMetricV3']['cvssV3']['baseScore'] | ||
181 | except: | ||
182 | cvssv3 = 0.0 | ||
183 | |||
184 | c.execute("insert or replace into NVD values (?, ?, ?, ?, ?, ?)", | ||
185 | [cveId, cveDesc, cvssv2, cvssv3, date, accessVector]) | ||
186 | |||
187 | configurations = elt['configurations']['nodes'] | ||
188 | for config in configurations: | ||
189 | parse_node_and_insert(c, config, cveId) | ||
190 | |||
191 | |||
192 | addtask do_populate_cve_db before do_fetch | ||
193 | do_populate_cve_db[nostamp] = "1" | ||
194 | |||
195 | EXCLUDE_FROM_WORLD = "1" | ||