chore(deps): update dependency json5 to 2.2.2 [security] - abandoned #211
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This PR contains the following updates:
2.1.3->2.2.2GitHub Vulnerability Alerts
CVE-2022-46175
The
parsemethod of the JSON5 library before and including version2.2.1does 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.parseand 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:If the user attempts to set the
isAdminkey, their request will be rejected:However, users can instead set the
__proto__key to{\"isAdmin\": true}.JSON5will parse this key and will set theisAdminkey on the prototype of the returned object, allowing the user to bypass the security check and run their request as an admin:Configuration
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