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ciscn_2019_c_1 栈溢出 输入的内容会被加密,有strlen函数,可以通过在payload开头放上 \0 来绕过加密; 没有system函数,所以考虑libc; 题目部署在Ubuntu18上调用system需要栈对齐,所以填充ret; exp
ciscn_2019_en_2 和上一题差不多,直接copy