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cve: improve read of partial and inexistant CVE

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nemunaire 2017-08-03 21:28:56 +02:00
parent 128afb5914
commit 0a576410c7
1 changed files with 46 additions and 20 deletions
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66
modules/cve.py
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@ -5,6 +5,7 @@
from bs4 import BeautifulSoup
from urllib.parse import quote
from nemubot.exception import IMException
from nemubot.hooks import hook
from nemubot.tools.web import getURLContent, striphtml
@ -15,31 +16,44 @@ BASEURL_NIST = 'https://nvd.nist.gov/vuln/detail/'
# MODULE CORE #########################################################
VULN_DATAS = {
"alert-title": "vuln-warning-status-name",
"alert-content": "vuln-warning-banner-content",
"description": "vuln-description",
"published": "vuln-published-on",
"last_modified": "vuln-last-modified-on",
"source": "vuln-source",
"base_score": "vuln-cvssv3-base-score-link",
"severity": "vuln-cvssv3-base-score-severity",
"impact_score": "vuln-cvssv3-impact-score",
"exploitability_score": "vuln-cvssv3-exploitability-score",
"av": "vuln-cvssv3-av",
"ac": "vuln-cvssv3-ac",
"pr": "vuln-cvssv3-pr",
"ui": "vuln-cvssv3-ui",
"s": "vuln-cvssv3-s",
"c": "vuln-cvssv3-c",
"i": "vuln-cvssv3-i",
"a": "vuln-cvssv3-a",
}
def get_cve(cve_id):
search_url = BASEURL_NIST + quote(cve_id.upper())
soup = BeautifulSoup(getURLContent(search_url))
return {
"description": soup.body.find(attrs={"data-testid":"vuln-description"}).text.strip(),
"published": soup.body.find(attrs={"data-testid":"vuln-published-on"}).text.strip(),
"last_modified": soup.body.find(attrs={"data-testid":"vuln-last-modified-on"}).text.strip(),
"source": soup.body.find(attrs={"data-testid":"vuln-source"}).text.strip(),
vuln = {}
"base_score": float(soup.body.find(attrs={"data-testid":"vuln-cvssv3-base-score-link"}).text.strip()),
"severity": soup.body.find(attrs={"data-testid":"vuln-cvssv3-base-score-severity"}).text.strip(),
"impact_score": float(soup.body.find(attrs={"data-testid":"vuln-cvssv3-impact-score"}).text.strip()),
"exploitability_score": float(soup.body.find(attrs={"data-testid":"vuln-cvssv3-exploitability-score"}).text.strip()),
for vd in VULN_DATAS:
r = soup.body.find(attrs={"data-testid": VULN_DATAS[vd]})
if r:
vuln[vd] = r.text.strip()
"av": soup.body.find(attrs={"data-testid":"vuln-cvssv3-av"}).text.strip(),
"ac": soup.body.find(attrs={"data-testid":"vuln-cvssv3-ac"}).text.strip(),
"pr": soup.body.find(attrs={"data-testid":"vuln-cvssv3-pr"}).text.strip(),
"ui": soup.body.find(attrs={"data-testid":"vuln-cvssv3-ui"}).text.strip(),
"s": soup.body.find(attrs={"data-testid":"vuln-cvssv3-s"}).text.strip(),
"c": soup.body.find(attrs={"data-testid":"vuln-cvssv3-c"}).text.strip(),
"i": soup.body.find(attrs={"data-testid":"vuln-cvssv3-i"}).text.strip(),
"a": soup.body.find(attrs={"data-testid":"vuln-cvssv3-a"}).text.strip(),
}
return vuln
def display_metrics(av, ac, pr, ui, s, c, i, a, **kwargs):
@ -68,7 +82,19 @@ def get_cve_desc(msg):
cve_id = 'cve-' + cve_id
cve = get_cve(cve_id)
metrics = display_metrics(**cve)
res.append_message("{cveid}: Base score: \x02{base_score} {severity}\x0F (impact: \x02{impact_score}\x0F, exploitability: \x02{exploitability_score}\x0F; {metrics}), from \x02{source}\x0F, last modified on \x02{last_modified}\x0F. {description}".format(cveid=cve_id, metrics=metrics, **cve))
if not cve:
raise IMException("CVE %s doesn't exists." % cve_id)
if "alert-title" in cve or "alert-content" in cve:
alert = "\x02%s:\x0F %s " % (cve["alert-title"] if "alert-title" in cve else "",
cve["alert-content"] if "alert-content" in cve else "")
else:
alert = ""
if "base_score" not in cve and "description" in cve:
res.append_message("{alert}From \x02{source}\x0F, last modified on \x02{last_modified}\x0F. {description}".format(alert=alert, **cve), title=cve_id)
else:
metrics = display_metrics(**cve)
res.append_message("{alert}Base score: \x02{base_score} {severity}\x0F (impact: \x02{impact_score}\x0F, exploitability: \x02{exploitability_score}\x0F; {metrics}), from \x02{source}\x0F, last modified on \x02{last_modified}\x0F. {description}".format(alert=alert, metrics=metrics, **cve), title=cve_id)
return res