CVE-2022-46175 mta-ui-container: json5: Prototype Pollution in JSON5 via Parse Method [mta-6]

Security Tracking Issue

Do not make this issue public.

Impact: Moderate
Reported Date: 26-Dec-2022
PM Fix/Wontfix Decision By: 26-Jan-2023
Resolve Bug By: 24-Jun-2023

In case the dates above are already past, please evaluate this bug in your next prioritization review and make a decision then. Remember to explicitly set CLOSED:WONTFIX if you decide not to fix this bug.

Please review this tracker and its impact on your product or service, as soon as possible. The trackers are filed WITHOUT in-depth analysis as the vulnerability has a Low or Moderate severity impact on this product or service. For more details, please refer to following confluence page - https://docs.engineering.redhat.com/x/3e_3EQ

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Flaw:

CVE-2022-46175 json5: Prototype Pollution in JSON5 via Parse Method
https://bugzilla.redhat.com/show_bug.cgi?id=2156263

JSON5 is an extension to the popular JSON file format that aims to be easier to write and maintain by hand (e.g. for config files). 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. 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. `JSON5.parse` should restrict parsing of `proto` keys when parsing JSON strings to objects. As a point of reference, the `JSON.parse` method included in JavaScript ignores `proto_` keys. Simply changing `JSON5.parse` to `JSON.parse` in the examples above mitigates this vulnerability. This vulnerability is patched in json5 version 2.2.2 and later.

https://github.com/json5/json5/security/advisories/GHSA-9c47-m6qq-7p4h
https://github.com/json5/json5/issues/199
https://github.com/json5/json5/issues/295