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# Copyright 2015 Raphael Hertzog <hertzog@debian.org>
#
# This file 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 file 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 file. If not, see <https://www.gnu.org/licenses/>.
import json
import os.path
import re
import subprocess
import requests
import six
class TrackerData(object):
DATA_URL = "https://security-tracker.debian.org/tracker/data/json"
GIT_URL = "https://salsa.debian.org/security-tracker-team/security-tracker.git"
CACHED_DATA_PATH = "~/.cache/debian_security_tracker.json"
CACHED_REVISION_PATH = "~/.cache/debian_security_tracker.rev"
GET_REVISION_COMMAND = \
"LC_ALL=C git ls-remote %s | awk '/HEAD$/ { print $1 }'" % GIT_URL
DATA_DIR = os.path.join(os.path.dirname(os.path.dirname(__file__)), 'data')
def __init__(self, update_cache=True):
self._latest_revision = None
self.cached_data_path = os.path.expanduser(self.CACHED_DATA_PATH)
self.cached_revision_path = os.path.expanduser(
self.CACHED_REVISION_PATH)
if update_cache:
self.update_cache()
self.load()
@property
def latest_revision(self):
"""Return the current revision of the Git repository"""
# Return cached value if available
if self._latest_revision is not None:
return self._latest_revision
# Otherwise call out to git to get the latest revision
output = subprocess.check_output(self.GET_REVISION_COMMAND,
shell=True)
self._latest_revision = output.strip()
return self._latest_revision
def _cache_must_be_updated(self):
"""Verify if the cache is out of date"""
if os.path.exists(self.cached_data_path) and os.path.exists(
self.cached_revision_path):
with open(self.cached_revision_path, 'r') as f:
try:
revision = f.read()
except ValueError:
revision = None
if revision == self.latest_revision:
return False
return True
def update_cache(self):
"""Update the cached data if it's out of date"""
if not self._cache_must_be_updated():
return
print("Updating {} from {} ...".format(self.CACHED_DATA_PATH,
self.DATA_URL))
response = requests.get(self.DATA_URL, allow_redirects=True)
response.raise_for_status()
with open(self.cached_data_path, 'w') as cache_file:
cache_file.write(response.text)
with open(self.cached_revision_path, 'w') as rev_file:
rev_file.write('{}'.format(self.latest_revision))
def load(self):
with open(self.cached_data_path, 'r') as f:
self.data = json.load(f)
self.load_dsa_dla_needed()
self.load_point_updates()
@classmethod
def parse_needed_file(self, inputfile):
PKG_RE = '^(\S+)(?:\s+\((.*)\))?$'
SEP_RE = '^--$'
state = 'LOOK_FOR_SEP'
result = {}
package = ''
for line in inputfile:
# Always strip whitespace from end of line
line = line.rstrip()
if state == 'LOOK_FOR_SEP':
res = re.match(SEP_RE, line)
if not res:
if package:
result[package]['more'] += '\n' + line
continue
package = ''
state = 'LOOK_FOR_PKG'
elif state == 'LOOK_FOR_PKG':
res = re.match(PKG_RE, line)
if res:
package = res.group(1)
result[package] = {
'taken_by': res.group(2),
'more': '',
}
state = 'LOOK_FOR_SEP'
return result
def load_dsa_dla_needed(self):
with open(os.path.join(self.DATA_DIR, 'dsa-needed.txt'), 'r') as f:
self.dsa_needed = self.parse_needed_file(f)
with open(os.path.join(self.DATA_DIR, 'dla-needed.txt'), 'r') as f:
self.dla_needed = self.parse_needed_file(f)
@classmethod
def parse_point_update_file(self, inputfile):
CVE_RE = 'CVE-[0-9]{4}-[0-9X]{4}'
result = {}
for line in inputfile:
res = re.match(CVE_RE, line)
if res:
cve = res.group(0)
result[cve] = {}
continue
elif line.startswith('\t['):
dist, _, pkg, ver = line.split()
result[cve][pkg] = ver
return result
def load_point_updates(self):
with open(os.path.join(self.DATA_DIR, 'next-oldstable-point-update.txt'), 'r') as f:
self.oldstable_point_update = self.parse_point_update_file(f)
with open(os.path.join(self.DATA_DIR, 'next-point-update.txt'), 'r') as f:
self.stable_point_update = self.parse_point_update_file(f)
def iterate_packages(self):
"""Iterate over known packages"""
for pkg in self.data:
yield pkg
def iterate_pkg_issues(self, pkg):
for id, data in six.iteritems(self.data[pkg]):
data['package'] = pkg
yield Issue(id, data)
class IssueStatus(object):
def __init__(self, status, reason=None):
self.status = status
self.reason = reason
def __str__(self):
return str((self.status, self.reason))
class Issue(object):
'''Status of a security issue'''
def __init__(self, name, data):
self.name = name
self.data = data
def get_status(self, release):
data = self.data['releases'].get(release)
if data is None:
status = 'not-affected'
# XXX: ask for data to differentiate between "package not in
# release" and "package not-affected"
reason = 'unknown'
elif data['status'] == 'resolved':
status = 'resolved'
reason = 'fixed in {}'.format(
self.data['releases'][release]['fixed_version'])
elif data.get('nodsa_reason', None) == 'ignored':
status = 'ignored'
reason = 'no-dsa'
elif data['status'] == 'undetermined':
status = 'ignored'
reason = 'undetermined'
elif 'nodsa' in data:
status = 'ignored'
reason = 'no-dsa'
elif data['urgency'] == 'unimportant':
status = 'ignored'
reason = 'unimportant'
elif data['urgency'] == 'end-of-life':
status = 'ignored'
reason = 'unsupported'
else:
status = 'open'
reason = 'nobody fixed it yet'
return IssueStatus(status, reason)
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