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웹/webhacking.kr

webhacking.kr 34번

최경환의 해킹공부 2021. 3. 2. 14:54

사이트에 들어가면 바로 이런 경고문구만 뜨고 아무것도 뜨지 않습니다. 그리고 소스코드를 보면 script부분이 존재합니다.

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이 부분을 보기 쉽게 바꿔주는 사이트를 이용해 바꿔주면 아래처럼 정리된 코드로 보이는데 이 때 사용한 사이트는 아래의 링크를 들어가서 이용하면 됩니다.

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			if (typeof K === 'string')
			{
				return function (M) {} [b('0x21', '2@LG')](b('0x22', 'joDm'))[b('0x23', 'iUmC')](b('0x24', 'llaF'));
			}
			else
			{
				if ('thtMU' === b('0x25', 'Am%6'))
				{
					if (('' + K / K)[b('0x26', 'RLUb')] !== 0x1 || K % 0x14 === 0x0)
					{
						if (b('0x27', '2@LG') !== b('0x28', 'bO4C'))
						{
							return !![];
						}
						else
						{
							(function ()
							{
								return !![];
							} [b('0x29', 'RLUb')](b('0x2a', 'ln]I') + b('0x2b', '3R^0'))['call'](b('0x2c', 'c3hQ')));
						}
					}
					else
					{
						(function ()
						{
							return ![];
						} [b('0x2d', 'Am%6')](b('0x2e', '14cN') + b('0x2f', '$ybZ'))[b('0x30', 'Am%6')](b('0x31', 'O!T!')));
					}
				}
				else
				{
					H();
				}
			}
			J(++K);
		}
	}
	try
	{
		if (I)
		{
			return J;
		}
		else
		{
			J(0x0);
		}
	}
	catch (P)
	{}
}

이 문제에서 debug me 라는 alert를 띄우기 때문에 소스코드에서

 

이 부분을 찾아서 console에 넣어보면 아래처럼 alert가 뜹니다.

그래서 보통 webhacking.kr문제들이 문제를 해결할때 location을 이용하여 페이지를 이동하는 경우가 많기 때문에 이 부분이 있는지 찾아보고, 있다면 console창에 넣어보겠습니다.

 

location[b('0x1c', '4c%d')] = b('0x1d', 'llaF') 일단 이 부분을 넣어보겠습니다.

그랬더니 바로 문제가 풀렸습니다. 조금 얼떨떨한 문제였네요

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