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cve_patch_linux.py
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#!/usr/bin/python3
import sys
import json
import pyfiglet
import argparse
from tqdm import tqdm
from pathlib import Path
from concurrent.futures import ThreadPoolExecutor, as_completed
from cve_utils import *
sys.path.append('..')
from utils import *
# 在扫描时排除的漏洞
CVE_EXCLUDE = {
}
# https://kernel.org/category/releases.html
KERNEL_VERSION = {
# LTS
'4.14': 'bebc6082da0a9f5d47a1ea2edc099bf671058bd4',
'4.19': '84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d',
'5.4': '219d54332a09e8d8741c1e1982f5eae56099de85',
'5.10': '2c85ebc57b3e1817b6ce1a6b703928e113a90442',
'5.15': '8bb7eca972ad531c9b149c0a51ab43a417385813',
'6.1': '830b3c68c1fb1e9176028d02ef86f3cf76aa2476',
'6.6': 'ffc253263a1375a65fa6c9f62a893e9767fbebfa',
# others
'4.4': 'afd2ff9b7e1b367172f18ba7f693dfb62bdcb2dc',
'4.9': '69973b830859bc6529a7a0468ba0d80ee5117826',
'5.4.147': '48a24510c328b3b3d7775377494b4ad4f58d189a',
'5.11': 'f40ddce88593482919761f74910f42f4b84c004b',
'5.12': '9f4ad9e425a1d3b6a34617b8ea226d56a119a717',
'5.13': '62fb9874f5da54fdb243003b386128037319b219',
'5.14': '7d2a07b769330c34b4deabeed939325c77a7ec2f',
'5.15.104': '115472395b0a9ea522ba0e106d6dfd7a73df8ba6',
'5.16': 'df0cc57e057f18e44dac8e6c18aba47ab53202f9',
}
def format_version(version: str):
version_list = version.split('-')[0].split('.') # 5.4-rc1 -> 5.4
version_list.append('0') if len(version_list) == 2 else None # 5.4 -> 5.4.0
return version_list
def update(args):
"""更新CVE补丁库"""
def update_cves_data(cve_data):
cvss = cvssVector = severity = None
if 'cvss3' in cve_data:
cvss = float(cve_data['cvss3']['score'])
cvssVector = cve_data['cvss3'].get('raw')
severity = get_severity(cvss)
elif 'cvss2' in cve_data:
cvss = float(cve_data['cvss2']['score'])
cvssVector = cve_data['cvss2'].get('raw')
severity = get_severity(cvss, version=2)
cve_data['cvss'] = cvss
cve_data['cvssVector'] = cvssVector
cve_data['severity'] = severity
for key in ['cvss3', 'cvss2', 'ref_urls']:
cve_data.pop(key, None)
return cve_data
if cves_path.exists():
output, ret_code = shell_cmd('git pull', env={'cwd': cves_path})
else:
output, ret_code = shell_cmd(f'git clone --depth=1 https://github.com/nluedtke/linux_kernel_cves.git {cves_path}')
if ret_code != 0:
print_failed(f'Update linux_kernel_cves Error: {output}')
return False
print_success(f'Update linux_kernel_cves: {cves_path}')
stream_fixes = json.load(open(cves_path.joinpath('data/stream_fixes.json')))
cves_data = json.load(open(cves_path.joinpath('data/kernel_cves.json')))
new_cves_data = {version: {}}
version1 = format_version(version)
tasks = []
executor = ThreadPoolExecutor(10)#os.cpu_count()-1)
for cve_id, value in stream_fixes.items():
for version2, commit in value.items():
cmt_id = commit['cmt_id']
fixed_version = format_version(commit['fixed_version'])
# 筛选对应版本漏洞
if '.'.join(version1[:2]) != version2:
continue
if int(version1[-1]) > int(fixed_version[-1]):
continue
# 去掉被撤回的漏洞
cve_data = update_cves_data(cves_data[cve_id])
cve_data['cve_id'] = cve_id
cve_data['url'] = f'{base_url}/commit/?h=linux-{version2}.y&id={cmt_id}'
cve_data['fixes'] = [f'{base_url}/patch/?id={cmt_id}']
if cve_data.get('rejected', False) is True:
continue
# 更新cves_data
new_cves_data[version][cve_id] = cve_data
# 下载补丁
tasks.append(executor.submit(patcher.download_and_write_patches, version, cve_data))
with tqdm(total=len(tasks)) as pbar:
for _ in as_completed(tasks):
pbar.update()
patcher.write_sec_data(new_cves_data)
def format(args):
"""为仓库生成补丁"""
# 生成补丁
commit = args.commit or KERNEL_VERSION[version]
target_path = patcher.patch_all_path.joinpath(version)
patcher.gen_patches_one_repo(repo_path, target_path, commit)
# 处理生成的补丁
patcher.process_patches()
def scan(args):
"""对比所有CVE补丁与所有补丁"""
patches = patcher.patch_sec_path.joinpath(version).glob('*.diff')
patcher.scan_patches(patches, patcher.scanThread)
def argument():
parser = argparse.ArgumentParser()
subparsers = parser.add_subparsers()
parser_update = subparsers.add_parser('update', help='update CVE patch data')
parser_update.add_argument('--version', help='Kernel version number', type=str, required=True)
parser_update.set_defaults(func=update)
parser_format = subparsers.add_parser('format', help='format local patch data')
parser_format.add_argument('--repo', help='Kernel git repository path', type=str, required=True)
parser_format.add_argument('--version', help='Kernel version number', type=str, required=True)
parser_format.add_argument('--commit', help='Kernel git commit id', type=str, default=None)
parser_format.set_defaults(func=format)
parser_scan = subparsers.add_parser('scan', help='scan CVE patch data')
parser_scan.add_argument('--version', help='Kernel version number', type=str, required=True)
parser_scan.add_argument('--strict', help='Strict mode', action='store_true', default=False)
parser_scan.set_defaults(func=scan)
return parser.parse_args()
if __name__ == '__main__':
print(pyfiglet.figlet_format('cve_patch_linux'))
base_url = 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git'
cves_path = Path(__file__).absolute().parents[1].joinpath('tools/linux_kernel_cves')
report_path = Path(__file__).absolute().parents[1].joinpath('data/SecScan')
report_path.mkdir(parents=True, exist_ok=True)
args = argument()
version = args.version
strict_mode = getattr(args, 'strict', False)
repo_path = Path(getattr(args, 'repo', '')).expanduser().absolute()
patcher = Patcher(
'linux', report_path,
version, repo_path, strict_mode,
CVE_EXCLUDE
)
# 第一步：更新CVE补丁库
if args.func.__name__ == 'update':
pass
# 第二步：为仓库生成补丁
elif args.func.__name__ == 'format':
if not patcher.sec_cves.exists():
print_failed('Please update first')
sys.exit(1)
# 第三步：对比所有CVE补丁与所有补丁
elif args.func.__name__ == 'scan':
if not patcher.all_patches.exists():
print_failed('Please format first')
sys.exit(1)
args.func(args)