Buffer Overflow 解题讨论 #21
wumingzhilian
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4.0有一个问题,二进制文件在/challenge目录下运行溢出时不产生corefile,所以不能coredump |
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结题思路:你可以把文件被拷贝到自己家目录,然后通过coredump获取控制RIP的输入位置,然后构造PoC,获取flag |
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有一个问题没绕明白,leave 时进行了 mov rbp, rsp; pop rbp 两步动作。这两步执行完毕之后,如果(刚刚被 pop 出来的)rbp(在之前某个时候)被修改,导致其事实位置冲到了比(当前的)rsp 更低的位上,那么 ret 时返回的地址是栈中哪个位置的呢 |
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我们在这里讨论 Buffer Overflow 模块中遇到的问题
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