tools: add script for vulnerability checking

This change adds a new script that queries vulnerability databases
in order to find if any of Node's dependencies is vulnerable.

The `deps/` directory of Node's repo is scanned to gather the
currently used version of each dependency, and if any vulnerability
is found for that version a message is printed out with its ID and
a link to a description of the issue.

Refs: nodejs/security-wg#802

PR-URL: nodejs/node#43362
Reviewed-By: Michael Dawson <midawson@redhat.com>
Reviewed-By: Vladimir de Turckheim <vlad2t@hotmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>

tools/dep_checker/README.md

@@ -0,0 +1,62 @@
+# Node.js dependency vulnerability checker
+
+This script queries the [National Vulnerability Database (NVD)](https://nvd.nist.gov/) and
+the [GitHub Advisory Database](https://github.com/advisories) for vulnerabilities found
+in Node's dependencies.
+
+## How to use
+
+In order to query the GitHub Advisory Database,
+a [Personal Access Token](https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/creating-a-personal-access-token)
+has to be created (no permissions need to be given to the token, since it's only used to query the public database).
+Once acquired, the script can be run as follows:
+
+```shell
+cd node/tools/dep_checker/
+pip install -r requirements.txt
+
+# Python >= 3.9 required
+python main.py --gh-token=$PERSONAL_ACCESS_TOKEN
+
+# or to skip querying the GitHub Advisory Database, simply run:
+python main.py
+```
+
+## Example output
+
+```
+WARNING: New vulnerabilities found
+- npm (version 1.2.1) :
+	- GHSA-v3jv-wrf4-5845: https://github.com/advisories/GHSA-v3jv-wrf4-5845
+	- GHSA-93f3-23rq-pjfp: https://github.com/advisories/GHSA-93f3-23rq-pjfp
+	- GHSA-m6cx-g6qm-p2cx: https://github.com/advisories/GHSA-m6cx-g6qm-p2cx
+	- GHSA-4328-8hgf-7wjr: https://github.com/advisories/GHSA-4328-8hgf-7wjr
+	- GHSA-x8qc-rrcw-4r46: https://github.com/advisories/GHSA-x8qc-rrcw-4r46
+	- GHSA-m5h6-hr3q-22h5: https://github.com/advisories/GHSA-m5h6-hr3q-22h5
+- acorn (version 6.0.0) :
+	- GHSA-6chw-6frg-f759: https://github.com/advisories/GHSA-6chw-6frg-f759
+
+For each dependency and vulnerability, check the following:
+- Check the vulnerability's description to see if it applies to the dependency as
+used by Node. If not, the vulnerability ID (either a CVE or a GHSA) can be added to the ignore list in
+dependencies.py. IMPORTANT: Only do this if certain that the vulnerability found is a false positive.
+- Otherwise, the vulnerability found must be remediated by updating the dependency in the Node repo to a
+non-affected version.
+```
+
+## Implementation details
+
+- For each dependency in Node's `deps/` folder, the script parses their version number and queries the databases to find
+  vulnerabilities for that specific version.
+- The queries can return false positives (
+  see [this](https://github.com/nodejs/security-wg/issues/802#issuecomment-1144207417) comment for an example). These
+  can be ignored by adding the vulnerability to the `ignore_list` in `dependencies.py`
+- The script takes a while to finish (~2 min) because queries to the NVD
+  are [rate-limited](https://nvd.nist.gov/developers)
+- If any vulnerabilities are found, the script returns 1 and prints out a list with the ID and a link to a description
+  of
+  the vulnerability. This is the case except when the ID matches one in the ignore-list (inside `dependencies.py`) in
+  which case the vulnerability is ignored.
+
+
+

tools/dep_checker/dependencies.py

@@ -0,0 +1,97 @@
+"""A list of dependencies, including their CPE, names and keywords for querying different vulnerability databases"""
+
+from typing import Optional
+import versions_parser as vp
+
+
+class CPE:
+    def __init__(self, vendor: str, product: str):
+        self.vendor = vendor
+        self.product = product
+
+
+class Dependency:
+    def __init__(
+        self,
+        version: str,
+        cpe: Optional[CPE] = None,
+        npm_name: Optional[str] = None,
+        keyword: Optional[str] = None,
+    ):
+        self.version = version
+        self.cpe = cpe
+        self.npm_name = npm_name
+        self.keyword = keyword
+
+    def get_cpe(self) -> Optional[str]:
+        if self.cpe:
+            return f"cpe:2.3:a:{self.cpe.vendor}:{self.cpe.product}:{self.version}:*:*:*:*:*:*:*"
+        else:
+            return None
+
+
+ignore_list: list[str] = [
+    "CVE-2018-25032",  # zlib, already fixed in the fork Node uses (Chromium's)
+    "CVE-2007-5536",  # openssl, old and only in combination with HP-UX
+    "CVE-2019-0190",  # openssl, can be only triggered in combination with Apache HTTP Server version 2.4.37
+]
+
+dependencies: dict[str, Dependency] = {
+    "zlib": Dependency(
+        version=vp.get_zlib_version(), cpe=CPE(vendor="zlib", product="zlib")
+    ),
+    # TODO: Add V8
+    # "V8": Dependency("cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "v8"),
+    "uvwasi": Dependency(version=vp.get_uvwasi_version(), cpe=None, keyword="uvwasi"),
+    "libuv": Dependency(
+        version=vp.get_libuv_version(), cpe=CPE(vendor="libuv_project", product="libuv")
+    ),
+    "undici": Dependency(
+        version=vp.get_undici_version(), cpe=None, keyword="undici", npm_name="undici"
+    ),
+    "OpenSSL": Dependency(
+        version=vp.get_openssl_version(), cpe=CPE(vendor="openssl", product="openssl")
+    ),
+    "npm": Dependency(
+        version=vp.get_npm_version(),
+        cpe=CPE(vendor="npmjs", product="npm"),
+        npm_name="npm",
+    ),
+    "nghttp3": Dependency(
+        version=vp.get_nghttp3_version(), cpe=None, keyword="nghttp3"
+    ),
+    "ngtcp2": Dependency(version=vp.get_ngtcp2_version(), cpe=None, keyword="ngtcp2"),
+    "nghttp2": Dependency(
+        version=vp.get_nghttp2_version(), cpe=CPE(vendor="nghttp2", product="nghttp2")
+    ),
+    "llhttp": Dependency(
+        version=vp.get_llhttp_version(),
+        cpe=CPE(vendor="llhttp", product="llhttp"),
+        npm_name="llhttp",
+    ),
+    "ICU": Dependency(
+        version=vp.get_icu_version(),
+        cpe=CPE(vendor="icu-project", product="international_components_for_unicode"),
+    ),
+    "HdrHistogram": Dependency(version="0.11.2", cpe=None, keyword="hdrhistogram"),
+    "corepack": Dependency(
+        version=vp.get_corepack_version(),
+        cpe=None,
+        keyword="corepack",
+        npm_name="corepack",
+    ),
+    "CJS Module Lexer": Dependency(
+        version=vp.get_cjs_lexer_version(),
+        cpe=None,
+        keyword="cjs-module-lexer",
+        npm_name="cjs-module-lexer",
+    ),
+    "c-ares": Dependency(
+        version=vp.get_c_ares_version(),
+        cpe=CPE(vendor="c-ares_project", product="c-ares"),
+    ),
+    "brotli": Dependency(
+        version=vp.get_brotli_version(), cpe=CPE(vendor="google", product="brotli")
+    ),
+    "acorn": Dependency(version=vp.get_acorn_version(), cpe=None, npm_name="acorn"),
+}

tools/dep_checker/main.py

@@ -0,0 +1,168 @@
+""" Node.js dependency vulnerability checker
+
+This script queries the National Vulnerability Database (NVD) and the GitHub Advisory Database for vulnerabilities found
+in Node's dependencies.
+
+For each dependency in Node's `deps/` folder, the script parses their version number and queries the databases to find
+vulnerabilities for that specific version.
+
+If any vulnerabilities are found, the script returns 1 and prints out a list with the ID and a link to a description of
+the vulnerability. This is the case except when the ID matches one in the ignore-list (inside `dependencies.py`) in
+which case the vulnerability is ignored.
+"""
+
+from argparse import ArgumentParser
+from collections import defaultdict
+from dependencies import ignore_list, dependencies
+from gql import gql, Client
+from gql.transport.aiohttp import AIOHTTPTransport
+from nvdlib import searchCVE  # type: ignore
+from packaging.specifiers import SpecifierSet
+
+
+class Vulnerability:
+    def __init__(self, id: str, url: str):
+        self.id = id
+        self.url = url
+
+
+vulnerability_found_message = """For each dependency and vulnerability, check the following:
+- Check that the dependency's version printed by the script corresponds to the version present in the Node repo.
+If not, update dependencies.py with the actual version number and run the script again.
+- If the version is correct, check the vulnerability's description to see if it applies to the dependency as
+used by Node. If not, the vulnerability ID (either a CVE or a GHSA) can be added to the ignore list in
+dependencies.py. IMPORTANT: Only do this if certain that the vulnerability found is a false positive.
+- Otherwise, the vulnerability found must be remediated by updating the dependency in the Node repo to a
+non-affected version, followed by updating dependencies.py with the new version.
+"""
+
+
+github_vulnerabilities_query = gql(
+    """
+    query($package_name:String!) {
+      securityVulnerabilities(package:$package_name, last:10) {
+        nodes {
+          vulnerableVersionRange
+          advisory {
+            ghsaId
+            permalink
+            withdrawnAt
+          }
+        }
+      }
+    }
+"""
+)
+
+
+def query_ghad(gh_token: str) -> dict[str, list[Vulnerability]]:
+    """Queries the GitHub Advisory Database for vulnerabilities reported for Node's dependencies.
+
+    The database supports querying by package name in the NPM ecosystem, so we only send queries for the dependencies
+    that are also NPM packages.
+    """
+
+    deps_in_npm = {
+        name: dep for name, dep in dependencies.items() if dep.npm_name is not None
+    }
+
+    transport = AIOHTTPTransport(
+        url="https://api.github.com/graphql",
+        headers={"Authorization": f"bearer {gh_token}"},
+    )
+    client = Client(
+        transport=transport,
+        fetch_schema_from_transport=True,
+        serialize_variables=True,
+        parse_results=True,
+    )
+
+    found_vulnerabilities: dict[str, list[Vulnerability]] = defaultdict(list)
+    for name, dep in deps_in_npm.items():
+        variables_package = {
+            "package_name": dep.npm_name,
+        }
+        result = client.execute(
+            github_vulnerabilities_query, variable_values=variables_package
+        )
+        matching_vulns = [
+            v
+            for v in result["securityVulnerabilities"]["nodes"]
+            if v["advisory"]["withdrawnAt"] is None
+            and dep.version in SpecifierSet(v["vulnerableVersionRange"])
+            and v["advisory"]["ghsaId"] not in ignore_list
+        ]
+        if matching_vulns:
+            found_vulnerabilities[name].extend(
+                [
+                    Vulnerability(
+                        id=vuln["advisory"]["ghsaId"], url=vuln["advisory"]["permalink"]
+                    )
+                    for vuln in matching_vulns
+                ]
+            )
+
+    return found_vulnerabilities
+
+
+def query_nvd() -> dict[str, list[Vulnerability]]:
+    """Queries the National Vulnerability Database for vulnerabilities reported for Node's dependencies.
+
+    The database supports querying by CPE (Common Platform Enumeration) or by a keyword present in the CVE's
+    description.
+    Since some of Node's dependencies don't have an associated CPE, we use their name as a keyword in the query.
+    """
+    deps_in_nvd = {
+        name: dep
+        for name, dep in dependencies.items()
+        if dep.cpe is not None or dep.keyword is not None
+    }
+    found_vulnerabilities: dict[str, list[Vulnerability]] = defaultdict(list)
+    for name, dep in deps_in_nvd.items():
+        query_results = [
+            cve
+            for cve in searchCVE(cpeMatchString=dep.get_cpe(), keyword=dep.keyword)
+            if cve.id not in ignore_list
+        ]
+        if query_results:
+            found_vulnerabilities[name].extend(
+                [Vulnerability(id=cve.id, url=cve.url) for cve in query_results]
+            )
+
+    return found_vulnerabilities
+
+
+def main():
+    parser = ArgumentParser(
+        description="Query the NVD and the GitHub Advisory Database for new vulnerabilities in Node's dependencies"
+    )
+    parser.add_argument(
+        "--gh-token",
+        help="the GitHub authentication token for querying the GH Advisory Database",
+    )
+    gh_token = parser.parse_args().gh_token
+    if gh_token is None:
+        print(
+            "Warning: GitHub authentication token not provided, skipping GitHub Advisory Database queries"
+        )
+    ghad_vulnerabilities: dict[str, list[Vulnerability]] = (
+        {} if gh_token is None else query_ghad(gh_token)
+    )
+    nvd_vulnerabilities = query_nvd()
+
+    if not ghad_vulnerabilities and not nvd_vulnerabilities:
+        print(f"No new vulnerabilities found ({len(ignore_list)} ignored)")
+        return 0
+    else:
+        print("WARNING: New vulnerabilities found")
+        for source in (ghad_vulnerabilities, nvd_vulnerabilities):
+            for name, vulns in source.items():
+                print(f"- {name} (version {dependencies[name].version}) :")
+                for v in vulns:
+                    print(f"\t- {v.id}: {v.url}")
+        print(f"\n{vulnerability_found_message}")
+        return 1
+
+
+if __name__ == "__main__":
+    exit(main())

tools/dep_checker/requirements.txt

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+gql[aiohttp]
+nvdlib
+packaging