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A question about CVE-2022-24999 #497

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heheda1212138 opened this issue Mar 4, 2024 · 1 comment
Closed

A question about CVE-2022-24999 #497

heheda1212138 opened this issue Mar 4, 2024 · 1 comment
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@heheda1212138
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Hi, i'm looking at CVE-2022-24999 vulnerability, but i'm confused about how Prototype Pollution is caused, i read the source code, i think the [hasOwnProperty] function has filtered 'proto' attribution, and even if i set 'allowPrototype' as true, it will asign an object to 'proto', so it won't cause Prototype Pollution.
So, if you can give me some hint, i'll appreciate it very much!

@ljharb
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ljharb commented Mar 4, 2024

As you can see from the linked PR, #428, it's not actually "prototype pollution" in that it doesn't pollute any shared [[Prototype]] objects - but it can pollute the prototype of the resulting parsed object, which can cause bugs in server code.

@ljharb ljharb added the question label Mar 4, 2024
@ljharb ljharb closed this as completed Jul 7, 2024
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