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cve-check: annotate CVEs during analysis
Add status information for each CVE under analysis.
Previously the information passed between different function of the
cve-check class included only tables of patched, unpatched, ignored
vulnerabilities and the general status of the recipe.
The VEX work requires more information, and we need to pass them
between different functions, so that it can be enriched as the
analysis progresses. Instead of multiple tables, use a single one
with annotations for each CVE encountered. For example, a patched
CVE will have:
{"abbrev-status": "Patched", "status": "version-not-in-range"}
abbrev-status contains the general status (Patched, Unpatched,
Ignored and Unknown that will be added in the VEX code)
status contains more detailed information that can come from
CVE_STATUS and the analysis.
Additional fields of the annotation include for example the name
of the patch file fixing a given CVE.
We also use the annotation in CVE_STATUS to filter out entries
that do not apply to the given recipe
(From OE-Core rev: 452e605b55ad61c08f4af7089a5a9c576ca28f7d)
Signed-off-by: Marta Rybczynska <marta.rybczynska@syslinbit.com>
Signed-off-by: Samantha Jalabert <samantha.jalabert@syslinbit.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Marta Rybczynska
Richard Purdie
parent
ebc8724416
commit
fb3f440b7d
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@ -189,10 +189,10 @@ python do_cve_check () {
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patched_cves = get_patched_cves(d)
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except FileNotFoundError:
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bb.fatal("Failure in searching patches")
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ignored, patched, unpatched, status = check_cves(d, patched_cves)
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if patched or unpatched or (d.getVar("CVE_CHECK_COVERAGE") == "1" and status):
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cve_data = get_cve_info(d, patched + unpatched + ignored)
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cve_write_data(d, patched, unpatched, ignored, cve_data, status)
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cve_data, status = check_cves(d, patched_cves)
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if len(cve_data) or (d.getVar("CVE_CHECK_COVERAGE") == "1" and status):
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get_cve_info(d, cve_data)
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cve_write_data(d, cve_data, status)
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else:
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bb.note("No CVE database found, skipping CVE check")
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@ -295,7 +295,51 @@ ROOTFS_POSTPROCESS_COMMAND:prepend = "${@'cve_check_write_rootfs_manifest ' if d
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do_rootfs[recrdeptask] += "${@'do_cve_check' if d.getVar('CVE_CHECK_CREATE_MANIFEST') == '1' else ''}"
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do_populate_sdk[recrdeptask] += "${@'do_cve_check' if d.getVar('CVE_CHECK_CREATE_MANIFEST') == '1' else ''}"
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def check_cves(d, patched_cves):
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def cve_is_ignored(d, cve_data, cve):
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if cve not in cve_data:
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return False
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if cve_data[cve]['abbrev-status'] == "Ignored":
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return True
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return False
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def cve_is_patched(d, cve_data, cve):
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if cve not in cve_data:
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return False
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if cve_data[cve]['abbrev-status'] == "Patched":
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return True
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return False
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def cve_update(d, cve_data, cve, entry):
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# If no entry, just add it
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if cve not in cve_data:
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cve_data[cve] = entry
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return
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# If we are updating, there might be change in the status
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bb.debug("Trying CVE entry update for %s from %s to %s" % (cve, cve_data[cve]['abbrev-status'], entry['abbrev-status']))
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if cve_data[cve]['abbrev-status'] == "Unknown":
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cve_data[cve] = entry
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return
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if cve_data[cve]['abbrev-status'] == entry['abbrev-status']:
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return
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# Update like in {'abbrev-status': 'Patched', 'status': 'version-not-in-range'} to {'abbrev-status': 'Unpatched', 'status': 'version-in-range'}
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if entry['abbrev-status'] == "Unpatched" and cve_data[cve]['abbrev-status'] == "Patched":
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if entry['status'] == "version-in-range" and cve_data[cve]['status'] == "version-not-in-range":
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# New result from the scan, vulnerable
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cve_data[cve] = entry
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bb.debug("CVE entry %s update from Patched to Unpatched from the scan result" % cve)
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return
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if entry['abbrev-status'] == "Patched" and cve_data[cve]['abbrev-status'] == "Unpatched":
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if entry['status'] == "version-not-in-range" and cve_data[cve]['status'] == "version-in-range":
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# Range does not match the scan, but we already have a vulnerable match, ignore
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bb.debug("CVE entry %s update from Patched to Unpatched from the scan result - not applying" % cve)
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return
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# If we have an "Ignored", it has a priority
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if cve_data[cve]['abbrev-status'] == "Ignored":
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bb.debug("CVE %s not updating because Ignored" % cve)
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return
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bb.warn("Unhandled CVE entry update for %s from %s to %s" % (cve, cve_data[cve], entry))
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def check_cves(d, cve_data):
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"""
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Connect to the NVD database and find unpatched cves.
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"""
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@ -305,28 +349,19 @@ def check_cves(d, patched_cves):
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real_pv = d.getVar("PV")
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suffix = d.getVar("CVE_VERSION_SUFFIX")
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cves_unpatched = []
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cves_ignored = []
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cves_status = []
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cves_in_recipe = False
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# CVE_PRODUCT can contain more than one product (eg. curl/libcurl)
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products = d.getVar("CVE_PRODUCT").split()
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# If this has been unset then we're not scanning for CVEs here (for example, image recipes)
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if not products:
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return ([], [], [], [])
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return ([], [])
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pv = d.getVar("CVE_VERSION").split("+git")[0]
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# If the recipe has been skipped/ignored we return empty lists
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if pn in d.getVar("CVE_CHECK_SKIP_RECIPE").split():
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bb.note("Recipe has been skipped by cve-check")
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return ([], [], [], [])
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# Convert CVE_STATUS into ignored CVEs and check validity
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cve_ignore = []
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for cve in (d.getVarFlags("CVE_STATUS") or {}):
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decoded_status = decode_cve_status(d, cve)
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if 'mapping' in decoded_status and decoded_status['mapping'] == "Ignored":
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cve_ignore.append(cve)
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return ([], [])
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import sqlite3
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db_file = d.expand("file:${CVE_CHECK_DB_FILE}?mode=ro")
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@ -345,11 +380,10 @@ def check_cves(d, patched_cves):
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for cverow in cve_cursor:
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cve = cverow[0]
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if cve in cve_ignore:
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if cve_is_ignored(d, cve_data, cve):
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bb.note("%s-%s ignores %s" % (product, pv, cve))
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cves_ignored.append(cve)
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continue
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elif cve in patched_cves:
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elif cve_is_patched(d, cve_data, cve):
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bb.note("%s has been patched" % (cve))
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continue
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# Write status once only for each product
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@ -365,7 +399,7 @@ def check_cves(d, patched_cves):
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for row in product_cursor:
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(_, _, _, version_start, operator_start, version_end, operator_end) = row
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#bb.debug(2, "Evaluating row " + str(row))
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if cve in cve_ignore:
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if cve_is_ignored(d, cve_data, cve):
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ignored = True
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version_start = convert_cve_version(version_start)
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@ -404,16 +438,16 @@ def check_cves(d, patched_cves):
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if vulnerable:
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if ignored:
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bb.note("%s is ignored in %s-%s" % (cve, pn, real_pv))
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cves_ignored.append(cve)
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cve_update(d, cve_data, cve, {"abbrev-status": "Ignored"})
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else:
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bb.note("%s-%s is vulnerable to %s" % (pn, real_pv, cve))
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cves_unpatched.append(cve)
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cve_update(d, cve_data, cve, {"abbrev-status": "Unpatched", "status": "version-in-range"})
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break
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product_cursor.close()
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if not vulnerable:
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bb.note("%s-%s is not vulnerable to %s" % (pn, real_pv, cve))
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patched_cves.add(cve)
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cve_update(d, cve_data, cve, {"abbrev-status": "Patched", "status": "version-not-in-range"})
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cve_cursor.close()
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if not cves_in_product:
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@ -421,48 +455,45 @@ def check_cves(d, patched_cves):
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cves_status.append([product, False])
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conn.close()
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diff_ignore = list(set(cve_ignore) - set(cves_ignored))
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if diff_ignore:
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oe.qa.handle_error("cve_status_not_in_db", "Found CVE (%s) with CVE_STATUS set that are not found in database for this component" % " ".join(diff_ignore), d)
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if not cves_in_recipe:
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bb.note("No CVE records for products in recipe %s" % (pn))
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return (list(cves_ignored), list(patched_cves), cves_unpatched, cves_status)
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return (cve_data, cves_status)
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def get_cve_info(d, cves):
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def get_cve_info(d, cve_data):
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"""
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Get CVE information from the database.
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"""
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import sqlite3
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cve_data = {}
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db_file = d.expand("file:${CVE_CHECK_DB_FILE}?mode=ro")
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conn = sqlite3.connect(db_file, uri=True)
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for cve in cves:
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for cve in cve_data:
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cursor = conn.execute("SELECT * FROM NVD WHERE ID IS ?", (cve,))
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for row in cursor:
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cve_data[row[0]] = {}
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cve_data[row[0]]["summary"] = row[1]
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cve_data[row[0]]["scorev2"] = row[2]
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cve_data[row[0]]["scorev3"] = row[3]
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cve_data[row[0]]["modified"] = row[4]
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cve_data[row[0]]["vector"] = row[5]
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cve_data[row[0]]["vectorString"] = row[6]
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# The CVE itdelf has been added already
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if row[0] not in cve_data:
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bb.note("CVE record %s not present" % row[0])
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continue
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#cve_data[row[0]] = {}
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cve_data[row[0]]["NVD-summary"] = row[1]
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cve_data[row[0]]["NVD-scorev2"] = row[2]
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cve_data[row[0]]["NVD-scorev3"] = row[3]
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cve_data[row[0]]["NVD-modified"] = row[4]
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cve_data[row[0]]["NVD-vector"] = row[5]
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cve_data[row[0]]["NVD-vectorString"] = row[6]
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cursor.close()
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conn.close()
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return cve_data
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def cve_write_data_text(d, patched, unpatched, ignored, cve_data):
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def cve_write_data_text(d, cve_data):
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"""
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Write CVE information in WORKDIR; and to CVE_CHECK_DIR, and
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CVE manifest if enabled.
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"""
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from oe.cve_check import decode_cve_status
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cve_file = d.getVar("CVE_CHECK_LOG")
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fdir_name = d.getVar("FILE_DIRNAME")
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layer = fdir_name.split("/")[-3]
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@ -479,7 +510,7 @@ def cve_write_data_text(d, patched, unpatched, ignored, cve_data):
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return
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# Early exit, the text format does not report packages without CVEs
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if not patched+unpatched+ignored:
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if not len(cve_data):
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return
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nvd_link = "https://nvd.nist.gov/vuln/detail/"
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@ -488,36 +519,29 @@ def cve_write_data_text(d, patched, unpatched, ignored, cve_data):
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bb.utils.mkdirhier(os.path.dirname(cve_file))
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for cve in sorted(cve_data):
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is_patched = cve in patched
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is_ignored = cve in ignored
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status = "Unpatched"
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if (is_patched or is_ignored) and not report_all:
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if not report_all and (cve_data[cve]["abbrev-status"] == "Patched" or cve_data[cve]["abbrev-status"] == "Ignored"):
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continue
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if is_ignored:
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status = "Ignored"
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elif is_patched:
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status = "Patched"
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else:
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# default value of status is Unpatched
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unpatched_cves.append(cve)
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write_string += "LAYER: %s\n" % layer
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write_string += "PACKAGE NAME: %s\n" % d.getVar("PN")
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write_string += "PACKAGE VERSION: %s%s\n" % (d.getVar("EXTENDPE"), d.getVar("PV"))
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write_string += "CVE: %s\n" % cve
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write_string += "CVE STATUS: %s\n" % status
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status_details = decode_cve_status(d, cve)
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if 'detail' in status_details:
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write_string += "CVE DETAIL: %s\n" % status_details['detail']
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if 'description' in status_details:
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write_string += "CVE DESCRIPTION: %s\n" % status_details['description']
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write_string += "CVE SUMMARY: %s\n" % cve_data[cve]["summary"]
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write_string += "CVSS v2 BASE SCORE: %s\n" % cve_data[cve]["scorev2"]
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write_string += "CVSS v3 BASE SCORE: %s\n" % cve_data[cve]["scorev3"]
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write_string += "VECTOR: %s\n" % cve_data[cve]["vector"]
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write_string += "VECTORSTRING: %s\n" % cve_data[cve]["vectorString"]
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write_string += "CVE STATUS: %s\n" % cve_data[cve]["abbrev-status"]
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if 'status' in cve_data[cve]:
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write_string += "CVE DETAIL: %s\n" % cve_data[cve]["status"]
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if 'justification' in cve_data[cve]:
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write_string += "CVE DESCRIPTION: %s\n" % cve_data[cve]["justification"]
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if "NVD-summary" in cve_data[cve]:
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write_string += "CVE SUMMARY: %s\n" % cve_data[cve]["NVD-summary"]
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write_string += "CVSS v2 BASE SCORE: %s\n" % cve_data[cve]["NVD-scorev2"]
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write_string += "CVSS v3 BASE SCORE: %s\n" % cve_data[cve]["NVD-scorev3"]
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write_string += "VECTOR: %s\n" % cve_data[cve]["NVD-vector"]
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write_string += "VECTORSTRING: %s\n" % cve_data[cve]["NVD-vectorString"]
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write_string += "MORE INFORMATION: %s%s\n\n" % (nvd_link, cve)
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if cve_data[cve]["abbrev-status"] == "Unpatched":
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unpatched_cves.append(cve)
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if unpatched_cves and d.getVar("CVE_CHECK_SHOW_WARNINGS") == "1":
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bb.warn("Found unpatched CVE (%s), for more information check %s" % (" ".join(unpatched_cves),cve_file))
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@ -569,13 +593,11 @@ def cve_check_write_json_output(d, output, direct_file, deploy_file, manifest_fi
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with open(index_path, "a+") as f:
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f.write("%s\n" % fragment_path)
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def cve_write_data_json(d, patched, unpatched, ignored, cve_data, cve_status):
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def cve_write_data_json(d, cve_data, cve_status):
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"""
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Prepare CVE data for the JSON format, then write it.
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"""
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from oe.cve_check import decode_cve_status
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output = {"version":"1", "package": []}
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nvd_link = "https://nvd.nist.gov/vuln/detail/"
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@ -593,8 +615,6 @@ def cve_write_data_json(d, patched, unpatched, ignored, cve_data, cve_status):
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if include_layers and layer not in include_layers:
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return
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unpatched_cves = []
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product_data = []
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for s in cve_status:
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p = {"product": s[0], "cvesInRecord": "Yes"}
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@ -609,39 +629,31 @@ def cve_write_data_json(d, patched, unpatched, ignored, cve_data, cve_status):
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"version" : package_version,
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"products": product_data
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}
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cve_list = []
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for cve in sorted(cve_data):
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is_patched = cve in patched
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is_ignored = cve in ignored
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status = "Unpatched"
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if (is_patched or is_ignored) and not report_all:
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if not report_all and (cve_data[cve]["abbrev-status"] == "Patched" or cve_data[cve]["abbrev-status"] == "Ignored"):
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continue
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if is_ignored:
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status = "Ignored"
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elif is_patched:
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status = "Patched"
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else:
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# default value of status is Unpatched
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unpatched_cves.append(cve)
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issue_link = "%s%s" % (nvd_link, cve)
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cve_item = {
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"id" : cve,
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"summary" : cve_data[cve]["summary"],
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"scorev2" : cve_data[cve]["scorev2"],
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"scorev3" : cve_data[cve]["scorev3"],
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"vector" : cve_data[cve]["vector"],
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"vectorString" : cve_data[cve]["vectorString"],
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"status" : status,
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"link": issue_link
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"status" : cve_data[cve]["abbrev-status"],
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"link": issue_link,
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}
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status_details = decode_cve_status(d, cve)
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if 'detail' in status_details:
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cve_item["detail"] = status_details['detail']
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if 'description' in status_details:
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cve_item["description"] = status_details['description']
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if 'NVD-summary' in cve_data[cve]:
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cve_item["summary"] = cve_data[cve]["NVD-summary"]
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cve_item["scorev2"] = cve_data[cve]["NVD-scorev2"]
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cve_item["scorev3"] = cve_data[cve]["NVD-scorev3"]
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cve_item["vector"] = cve_data[cve]["NVD-vector"]
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cve_item["vectorString"] = cve_data[cve]["NVD-vectorString"]
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if 'status' in cve_data[cve]:
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cve_item["detail"] = cve_data[cve]["status"]
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if 'justification' in cve_data[cve]:
|
||||
cve_item["description"] = cve_data[cve]["justification"]
|
||||
if 'resource' in cve_data[cve]:
|
||||
cve_item["patch-file"] = cve_data[cve]["resource"]
|
||||
cve_list.append(cve_item)
|
||||
|
||||
package_data["issue"] = cve_list
|
||||
|
|
@ -653,12 +665,12 @@ def cve_write_data_json(d, patched, unpatched, ignored, cve_data, cve_status):
|
|||
|
||||
cve_check_write_json_output(d, output, direct_file, deploy_file, manifest_file)
|
||||
|
||||
def cve_write_data(d, patched, unpatched, ignored, cve_data, status):
|
||||
def cve_write_data(d, cve_data, status):
|
||||
"""
|
||||
Write CVE data in each enabled format.
|
||||
"""
|
||||
|
||||
if d.getVar("CVE_CHECK_FORMAT_TEXT") == "1":
|
||||
cve_write_data_text(d, patched, unpatched, ignored, cve_data)
|
||||
cve_write_data_text(d, cve_data)
|
||||
if d.getVar("CVE_CHECK_FORMAT_JSON") == "1":
|
||||
cve_write_data_json(d, patched, unpatched, ignored, cve_data, status)
|
||||
cve_write_data_json(d, cve_data, status)
|
||||
|
|
|
|||
|
|
@ -88,7 +88,7 @@ def get_patched_cves(d):
|
|||
# (cve_match regular expression)
|
||||
cve_file_name_match = re.compile(r".*(CVE-\d{4}-\d+)", re.IGNORECASE)
|
||||
|
||||
patched_cves = set()
|
||||
patched_cves = {}
|
||||
patches = oe.patch.src_patches(d)
|
||||
bb.debug(2, "Scanning %d patches for CVEs" % len(patches))
|
||||
for url in patches:
|
||||
|
|
@ -98,7 +98,7 @@ def get_patched_cves(d):
|
|||
fname_match = cve_file_name_match.search(patch_file)
|
||||
if fname_match:
|
||||
cve = fname_match.group(1).upper()
|
||||
patched_cves.add(cve)
|
||||
patched_cves[cve] = {"abbrev-status": "Patched", "status": "fix-file-included", "resource": patch_file}
|
||||
bb.debug(2, "Found %s from patch file name %s" % (cve, patch_file))
|
||||
|
||||
# Remote patches won't be present and compressed patches won't be
|
||||
|
|
@ -124,7 +124,7 @@ def get_patched_cves(d):
|
|||
cves = patch_text[match.start()+5:match.end()]
|
||||
for cve in cves.split():
|
||||
bb.debug(2, "Patch %s solves %s" % (patch_file, cve))
|
||||
patched_cves.add(cve)
|
||||
patched_cves[cve] = {"abbrev-status": "Patched", "status": "fix-file-included", "resource": patch_file}
|
||||
text_match = True
|
||||
|
||||
if not fname_match and not text_match:
|
||||
|
|
@ -133,9 +133,15 @@ def get_patched_cves(d):
|
|||
# Search for additional patched CVEs
|
||||
for cve in (d.getVarFlags("CVE_STATUS") or {}):
|
||||
decoded_status = decode_cve_status(d, cve)
|
||||
if 'mapping' in decoded_status and decoded_status['mapping'] == "Patched":
|
||||
bb.debug(2, "CVE %s is additionally patched" % cve)
|
||||
patched_cves.add(cve)
|
||||
products = d.getVar("CVE_PRODUCT")
|
||||
if has_cve_product_match(decoded_status, products) == True:
|
||||
patched_cves[cve] = {
|
||||
"abbrev-status": decoded_status["mapping"],
|
||||
"status": decoded_status["detail"],
|
||||
"justification": decoded_status["description"],
|
||||
"affected-vendor": decoded_status["vendor"],
|
||||
"affected-product": decoded_status["product"]
|
||||
}
|
||||
|
||||
return patched_cves
|
||||
|
||||
|
|
@ -264,3 +270,20 @@ def decode_cve_status(d, cve):
|
|||
status_out["mapping"] = status_mapping
|
||||
|
||||
return status_out
|
||||
|
||||
def has_cve_product_match(detailed_status, products):
|
||||
"""
|
||||
Check product/vendor match between detailed_status from decode_cve_status and a string of
|
||||
products (like from CVE_PRODUCT)
|
||||
"""
|
||||
for product in products.split():
|
||||
vendor = "*"
|
||||
if ":" in product:
|
||||
vendor, product = product.split(":", 1)
|
||||
|
||||
if (vendor == detailed_status["vendor"] or detailed_status["vendor"] == "*") and \
|
||||
(product == detailed_status["product"] or detailed_status["product"] == "*"):
|
||||
return True
|
||||
|
||||
#if no match, return False
|
||||
return False
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user