[Buildroot] [git commit branch/next] support/scripts/cve-checker: add a per configuration CVE checker

Thomas Petazzoni thomas.petazzoni at bootlin.com
Fri Aug 28 09:35:03 UTC 2020


commit: https://git.buildroot.net/buildroot/commit/?id=fafa3e4e293faabc0d38a714eb88a25252936a99
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/next

This scripts takes as entry on stdin a JSON description of the package
used for a given configuration. This description is the one generated
by "make show-info".

The script generates the list of all the packages used and if they are
affected by a CVE. The output is either a JSON or an HTML file similar
to the one generated by pkg-stats.

Signed-off-by: Gregory CLEMENT <gregory.clement at bootlin.com>
Tested-by: Matthew Weber <matthew.weber at rockwellcollins.com>=
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
---
 support/scripts/cve-checker | 192 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 192 insertions(+)

diff --git a/support/scripts/cve-checker b/support/scripts/cve-checker
new file mode 100755
index 0000000000..2bfe2d8543
--- /dev/null
+++ b/support/scripts/cve-checker
@@ -0,0 +1,192 @@
+#!/usr/bin/env python
+
+# Copyright (C) 2009 by Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
+# Copyright (C) 2020 by Gregory CLEMENT <gregory.clement at bootlin.com>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+import argparse
+import datetime
+import os
+import json
+import sys
+import cve as cvecheck
+
+class Package:
+    def __init__(self, name, version, ignored_cves):
+        self.name = name
+        self.version = version
+        self.cves = list()
+        self.ignored_cves = ignored_cves
+
+def check_package_cves(nvd_path, packages):
+    if not os.path.isdir(nvd_path):
+        os.makedirs(nvd_path)
+
+    for cve in cvecheck.CVE.read_nvd_dir(nvd_path):
+        for pkg_name in cve.pkg_names:
+            pkg = packages.get(pkg_name, '')
+            if pkg and cve.affects(pkg.name, pkg.version, pkg.ignored_cves) == cve.CVE_AFFECTS:
+                pkg.cves.append(cve.identifier)
+
+html_header = """
+<head>
+<script src=\"https://www.kryogenix.org/code/browser/sorttable/sorttable.js\"></script>
+<style type=\"text/css\">
+table {
+  width: 100%;
+}
+td {
+  border: 1px solid black;
+}
+td.centered {
+  text-align: center;
+}
+td.wrong {
+  background: #ff9a69;
+}
+td.correct {
+  background: #d2ffc4;
+}
+
+</style>
+<title>CVE status for Buildroot configuration</title>
+</head>
+
+<p id=\"sortable_hint\"></p>
+"""
+
+
+html_footer = """
+</body>
+<script>
+if (typeof sorttable === \"object\") {
+  document.getElementById(\"sortable_hint\").innerHTML =
+  \"hint: the table can be sorted by clicking the column headers\"
+}
+</script>
+</html>
+"""
+
+
+def dump_html_pkg(f, pkg):
+    f.write(" <tr>\n")
+    f.write("  <td>%s</td>\n" % pkg.name)
+
+    # Current version
+    if len(pkg.version) > 20:
+        version = pkg.version[:20] + "..."
+    else:
+        version = pkg.version
+    f.write("  <td class=\"centered\">%s</td>\n" % version)
+
+    # CVEs
+    td_class = ["centered"]
+    if len(pkg.cves) == 0:
+        td_class.append("correct")
+    else:
+        td_class.append("wrong")
+    f.write("  <td class=\"%s\">\n" % " ".join(td_class))
+    for cve in pkg.cves:
+        f.write("   <a href=\"https://security-tracker.debian.org/tracker/%s\">%s<br/>\n" % (cve, cve))
+    f.write("  </td>\n")
+
+    f.write(" </tr>\n")
+
+
+def dump_html_all_pkgs(f, packages):
+    f.write("""
+<table class=\"sortable\">
+<tr>
+<td>Package</td>
+<td class=\"centered\">Version</td>
+<td class=\"centered\">CVEs</td>
+</tr>
+""")
+    for pkg in packages:
+        dump_html_pkg(f, pkg)
+    f.write("</table>")
+
+
+def dump_html_gen_info(f, date):
+    f.write("<p><i>Generated on %s</i></p>\n" % (str(date)))
+
+
+def dump_html(packages, date, output):
+    with open(output, 'w') as f:
+        f.write(html_header)
+        dump_html_all_pkgs(f, packages)
+        dump_html_gen_info(f, date)
+        f.write(html_footer)
+
+
+def dump_json(packages, date, output):
+    # Format packages as a dictionnary instead of a list
+    pkgs = {
+        pkg.name: {
+            "version": pkg.version,
+            "cves": pkg.cves,
+        } for pkg in packages
+    }
+     # The actual structure to dump, add date to it
+    final = {'packages': pkgs,
+             'date': str(date)}
+    with open(output, 'w') as f:
+        json.dump(final, f, indent=2, separators=(',', ': '))
+        f.write('\n')
+
+
+def resolvepath(path):
+        return os.path.abspath(os.path.expanduser(path))
+
+
+def parse_args():
+    parser = argparse.ArgumentParser()
+    output = parser.add_argument_group('output', 'Output file(s)')
+    output.add_argument('--html', dest='html', type=resolvepath,
+                        help='HTML output file')
+    output.add_argument('--json', dest='json', type=resolvepath,
+                        help='JSON output file')
+    parser.add_argument('--nvd-path', dest='nvd_path',
+                        help='Path to the local NVD database',type=resolvepath,
+                        required=True)
+    args = parser.parse_args()
+    if not args.html and not args.json:
+        parser.error('at least one of --html or --json (or both) is required')
+    return args
+
+
+def __main__():
+    packages = list()
+    content = json.load(sys.stdin)
+    for item in content:
+        pkg = content[item]
+        p = Package(item, pkg.get('version', ''), pkg.get('ignore_cves', ''))
+        packages.append(p)
+
+    args = parse_args()
+    date = datetime.datetime.utcnow()
+
+    print("Checking packages CVEs")
+    check_package_cves(args.nvd_path, {p.name: p for p in packages})
+
+    if args.html:
+        print("Write HTML")
+        dump_html(packages, date, args.html)
+    if args.json:
+        print("Write JSON")
+        dump_json(packages, date, args.json)
+
+__main__()


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