chore(deps): update dependency json5 to v2.2.2 [security]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
json5 (source)	2.2.0 → 2.2.2

---

Prototype Pollution in JSON5 via Parse Method

CVE-2022-46175 / GHSA-9c47-m6qq-7p4h

More information

Details

The parse method of the JSON5 library before and including version 2.2.1 does not restrict parsing of keys named __proto__, allowing specially crafted strings to pollute the prototype of the resulting object.

This vulnerability pollutes the prototype of the object returned by JSON5.parse and not the global Object prototype, which is the commonly understood definition of Prototype Pollution. However, polluting the prototype of a single object can have significant security impact for an application if the object is later used in trusted operations.

Impact

This vulnerability could allow an attacker to set arbitrary and unexpected keys on the object returned from JSON5.parse. The actual impact will depend on how applications utilize the returned object and how they filter unwanted keys, but could include denial of service, cross-site scripting, elevation of privilege, and in extreme cases, remote code execution.

Mitigation

This vulnerability is patched in json5 v2.2.2 and later. A patch has also been backported for json5 v1 in versions v1.0.2 and later.

Details

Suppose a developer wants to allow users and admins to perform some risky operation, but they want to restrict what non-admins can do. To accomplish this, they accept a JSON blob from the user, parse it using JSON5.parse, confirm that the provided data does not set some sensitive keys, and then performs the risky operation using the validated data:

const JSON5 = require('json5');

const doSomethingDangerous = (props) => {
  if (props.isAdmin) {
    console.log('Doing dangerous thing as admin.');
  } else {
    console.log('Doing dangerous thing as user.');
  }
};

const secCheckKeysSet = (obj, searchKeys) => {
  let searchKeyFound = false;
  Object.keys(obj).forEach((key) => {
    if (searchKeys.indexOf(key) > -1) {
      searchKeyFound = true;
    }
  });
  return searchKeyFound;
};

const props = JSON5.parse('{"foo": "bar"}');
if (!secCheckKeysSet(props, ['isAdmin', 'isMod'])) {
  doSomethingDangerous(props); // "Doing dangerous thing as user."
} else {
  throw new Error('Forbidden...');
}

If the user attempts to set the isAdmin key, their request will be rejected:

const props = JSON5.parse('{"foo": "bar", "isAdmin": true}');
if (!secCheckKeysSet(props, ['isAdmin', 'isMod'])) {
  doSomethingDangerous(props);
} else {
  throw new Error('Forbidden...'); // Error: Forbidden...
}

However, users can instead set the __proto__ key to {"isAdmin": true}. JSON5 will parse this key and will set the isAdmin key on the prototype of the returned object, allowing the user to bypass the security check and run their request as an admin:

const props = JSON5.parse('{"foo": "bar", "__proto__": {"isAdmin": true}}');
if (!secCheckKeysSet(props, ['isAdmin', 'isMod'])) {
  doSomethingDangerous(props); // "Doing dangerous thing as admin."
} else {
  throw new Error('Forbidden...');
}

Severity

• CVSS Score: 7.1 / 10 (High)
• Vector String: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:H

References

• https://github.com/json5/json5/security/advisories/GHSA-9c47-m6qq-7p4h
• https://nvd.nist.gov/vuln/detail/CVE-2022-46175
• https://github.com/json5/json5/issues/199
• https://github.com/json5/json5/issues/295
• https://github.com/json5/json5/pull/298
• https://github.com/json5/json5/commit/62a65408408d40aeea14c7869ed327acead12972
• https://github.com/json5/json5/commit/7774c1097993bc3ce9f0ac4b722a32bf7d6871c8
• https://lists.debian.org/debian-lts-announce/2023/11/msg00021.html
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3S26TLPLVFAJTUN3VIXFDEBEXDYO22CE
• https://github.com/advisories/GHSA-9c47-m6qq-7p4h

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

---

Release Notes

json5/json5 (json5)

v2.2.2

Compare Source

• Fix: Properties with the name __proto__ are added to objects and arrays.
  ([#​199]) This also fixes a prototype pollution vulnerability reported by
  Jonathan Gregson! ([#​295]).

v2.2.1

Compare Source

• Fix: Removed dependence on minimist to patch CVE-2021-44906. ([#​266])

---

Configuration

📅 Schedule: (UTC)

• Branch creation
  • At any time (no schedule defined)
• Automerge
  • At any time (no schedule defined)

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.