Merge "CVE policy filter script"
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Zuul
Gerrit Code Review
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cve_support/cve_policy_filter.py
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cve_support/cve_policy_filter.py
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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# Copyright (C) 2019 Intel Corporation
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#
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"""
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Implement policy based on
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https://wiki.openstack.org/wiki/StarlingX/Security/CVE_Support_Policy
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Create documentation as pydoc -w cve_policy_filter
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"""
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import json
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import sys
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import os
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def print_html_report(cves_report, title):
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"""
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Print the html report
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"""
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import jinja2
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template_loader = jinja2.FileSystemLoader(searchpath="./")
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template_env = jinja2.Environment(loader=template_loader)
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template_file = "template.txt"
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template = template_env.get_template(template_file)
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heads = ["cve_id", "status", "cvss2Score", "av", "ac", "au", "ai"]
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output_text = template.render(cves_to_fix=cves_report["cves_to_fix"],\
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cves_to_track=cves_report["cves_to_track"],\
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cves_w_errors=cves_report["cves_w_errors"],\
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cves_to_omit=cves_report["cves_to_omit"],\
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heads=heads,\
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title=title)
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report_title = 'report_%s.html' % (title)
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html_file = open(report_title, 'w')
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html_file.write(output_text)
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html_file.close()
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def print_report(cves_report, title):
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"""
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Print the txt STDOUT report
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"""
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print("\n%s report:" % (title))
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print("\nValid CVEs to take action immediately: %d\n" \
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% (len(cves_report["cves_to_fix"])))
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for cve in cves_report["cves_to_fix"]:
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print("\n")
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print(cve["id"])
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print("status : " + cve["status"])
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print("cvss2Score : " + str(cve["cvss2Score"]))
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print("Attack Vector: " + cve["av"])
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print("Access Complexity : " + cve["ac"])
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print("Authentication: " + cve["au"])
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print("Availability Impact :" + cve["ai"])
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print("Affected packages:")
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print(cve["affectedpackages"])
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print(cve["summary"])
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if cve["sourcelink"]:
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print(cve["sourcelink"])
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print("\nCVEs to track for incoming fix: %d \n" \
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% (len(cves_report["cves_to_track"])))
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for cve in cves_report["cves_to_track"]:
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cve_line = []
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for key, value in cve.items():
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if key != "summary":
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cve_line.append(key + ":" + str(value))
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print(cve_line)
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print("\nERROR: CVEs that have no cvss2Score or cvss2Vector: %d \n" \
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% (len(cves_report["cves_w_errors"])))
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for cve in cves_report["cves_w_errors"]:
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print(cve)
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def get_summary(data, cve_id):
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"""
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return: nvd summary
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"""
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try:
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summary = data["scannedCves"][cve_id]["cveContents"]["nvd"]["summary"]
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except KeyError:
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summary = None
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return summary
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def get_source_link(data, cve_id):
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"""
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return: web link to the nvd report
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"""
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try:
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source_link = data["scannedCves"][cve_id]["cveContents"]["nvd"]["sourceLink"]
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except KeyError:
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source_link = None
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return source_link
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def get_affectedpackages(data, cve_id):
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"""
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return: affected packages by the CVE and fix/unfix status of each package
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"""
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affectedpackages_list = []
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status_list = []
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try:
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affectedpackages = data["scannedCves"][cve_id]["affectedPackages"]
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except KeyError:
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affectedpackages = None
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else:
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for pkg in affectedpackages:
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affectedpackages_list.append(pkg["name"])
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status_list.append(pkg["notFixedYet"])
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return affectedpackages_list, status_list
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def get_status(status_list):
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"""
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return: status of CVE. If one of the pkgs is not fixed, CVE is not fixed
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"""
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status = None
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if True in status_list:
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status = "unfixed"
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else:
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status = "fixed"
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return status
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def main():
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"""
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main function
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Rules to consider a CVE valid for STX from:
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https://wiki.openstack.org/wiki/StarlingX/Security/CVE_Support_Policy
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"""
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data = {}
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cves = []
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cves_valid = []
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cves_to_fix = []
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cves_to_track = []
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cves_w_errors = []
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cves_to_omit = []
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cves_report = {}
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if len(sys.argv) < 3:
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print("\nERROR : Missing arguments, the expected arguments are:")
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print("\n %s <result.json> <title>\n" % (sys.argv[0]))
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print("\n result.json = json file generated from: vuls report -format-json")
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print("\n")
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sys.exit(0)
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if os.path.isfile(sys.argv[1]):
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results_json = sys.argv[1]
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else:
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print("%s is not a file" % sys.argv[1])
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sys.exit(0)
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title = sys.argv[2]
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try:
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with open(results_json) as json_file:
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data = json.load(json_file)
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except ValueError as error:
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print(error)
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for element in data["scannedCves"]:
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cve = {}
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cve["id"] = str(element.strip())
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cves.append(cve)
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for cve in cves:
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cve_id = cve["id"]
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affectedpackages_list = []
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status_list = []
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try:
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nvd2_score = data["scannedCves"][cve_id]["cveContents"]["nvd"]["cvss2Score"]
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cvss2vector = data["scannedCves"][cve_id]["cveContents"]["nvd"]["cvss2Vector"]
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except KeyError:
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cves_w_errors.append(cve)
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else:
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cve["cvss2Score"] = nvd2_score
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for element in cvss2vector.split("/"):
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if "AV:" in element:
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_av = element.split(":")[1]
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if "AC:" in element:
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_ac = element.split(":")[1]
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if "Au:" in element:
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_au = element.split(":")[1]
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if "A:" in element:
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_ai = element.split(":")[1]
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cve["av"] = str(_av)
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cve["ac"] = str(_ac)
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cve["au"] = str(_au)
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cve["ai"] = str(_ai)
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cve["summary"] = get_summary(data, cve_id)
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cve["sourcelink"] = get_source_link(data, cve_id)
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affectedpackages_list, status_list = get_affectedpackages(data, cve_id)
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cve["affectedpackages"] = affectedpackages_list
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cve["status"] = get_status(status_list)
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cves_valid.append(cve)
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for cve in cves_valid:
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if (cve["cvss2Score"] >= 7.0
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and cve["av"] == "N"
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and cve["ac"] == "L"
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and ("N" in cve["au"] or "S" in cve["au"])
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and ("P" in cve["ai"] or "C" in cve["ai"])):
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if cve["status"] == "fixed":
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cves_to_fix.append(cve)
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else:
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cves_to_track.append(cve)
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else:
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cves_to_omit.append(cve)
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cves_report["cves_to_fix"] = cves_to_fix
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cves_report["cves_to_track"] = cves_to_track
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cves_report["cves_w_errors"] = cves_w_errors
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cves_report["cves_to_omit"] = cves_to_omit
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print_report(cves_report, title)
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print_html_report(cves_report, title)
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if __name__ == "__main__":
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main()
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82
cve_support/template.txt
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82
cve_support/template.txt
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@ -0,0 +1,82 @@
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<head></head>
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<body>
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<h1>Security report from vuls scan from {{title}}</h1>
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<h2>Valid CVEs to take action immediately: {{cves_to_fix | length}}</h2>
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<table>
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{% if cves_to_fix|length > 1 %}
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<tr>
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{% for head in heads %}
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<th>{{head}}</th>
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{% endfor %}
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</tr>
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{% for cve in cves_to_fix %}
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<tr>
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<td>{{cve["id"]}}</td>
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<td>{{cve["status"]}}</td>
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<td>{{cve["cvss2Score"]}}</td>
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<td>{{cve["av"]}}</td>
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<td>{{cve["ac"]}}</td>
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<td>{{cve["au"]}}</td>
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<td>{{cve["ai"]}}</td>
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</tr>
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{% endfor %}
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{% endif %}
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</table>
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<h2> CVEs to track for incoming fix: {{cves_to_track | length}}</h2>
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<table>
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{% if cves_to_track|length > 1 %}
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<tr>
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{% for head in heads %}
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<th>{{head}}</th>
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{% endfor %}
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</tr>
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{% for cve in cves_to_track %}
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<tr>
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<td>{{cve["id"]}}</td>
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<td>{{cve["status"]}}</td>
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<td>{{cve["cvss2Score"]}}</td>
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<td>{{cve["av"]}}</td>
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<td>{{cve["ac"]}}</td>
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<td>{{cve["au"]}}</td>
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<td>{{cve["ai"]}}</td>
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</tr>
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{% endfor %}
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{% endif %}
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</table>
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<h2> CVEs to omit: {{cves_to_omit | length}}</h2>
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<table>
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{% if cves_to_omit|length > 1 %}
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<tr>
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{% for head in heads %}
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<th>{{head}}</th>
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{% endfor %}
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</tr>
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{% for cve in cves_to_omit %}
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<tr>
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<td>{{cve["id"]}}</td>
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<td>{{cve["status"]}}</td>
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<td>{{cve["cvss2Score"]}}</td>
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<td>{{cve["av"]}}</td>
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<td>{{cve["ac"]}}</td>
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<td>{{cve["au"]}}</td>
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<td>{{cve["ai"]}}</td>
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</tr>
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{% endfor %}
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{% endif %}
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</table>
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<h2>ERROR: CVEs that have no cvss2Score or cvss2Vector:{{cves_w_errors | length}}</h2>
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<table>
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{% if cves_w_errors|length > 1 %}
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{% for cve in cves_to_track %}
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<tr>
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<td>{{cve["id"]}}</td>
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<td>{{cve["status"]}}</td>
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</tr>
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{% endfor %}
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{% endif %}
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</table>
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</body>
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