Heapinspect

Kang Asu

Heapinspect - Inspect Heap In Python

HeapInspect is designed to make heap much more prettier.
Now this tool is a plugin of nadbg. Try it!

Features

• Free of gdb and other requirement
• Multi glibc support
  • 2.19, 2.23-2.27 (currently tested)
  • both 32bit and 64bit
• Nice UI to show heap
  • HeapShower (detailed)
  • PrettyPrinter (colorful, summary)
• Heapdiff (working)
• Corruption detect & exploit analysis (working)
• Also support gdb (python2 only) :)

Usage

Quick shot
A quick use of this tool.

You can also use it as a gdb plugin, very useful when pwndbg or other plugins failed to analysis heap.

sed -i "1i source `pwd`/gdbscript.py" ~/.gdbinit # alternatively, you can add that line manually

Note
HeapInspect does not support gdb python3 for now. Anyone who can make it python3 compatible are welcome.

Basic
Pretty easy to use. I will make it a package later.

from heapinspect.core import *
hi = HeapInspect(1234)       #pid here
hs = HeapShower(hi)

print(hs.fastbins)
print(hs.smallbins)
print(hs.largebins)
print(hs.unsortedbins)
print(hs.tcache_chunks)

hs.relative = 1              #relative mode, check Quick shot
print(hs.fastbins)

sleep(10)
#now assume that the heap state has changed
hs.update()                  #use this to refresh

pp = PrettyPrinter(hi)
print(pp.all)                #pretty printer
pp.update()                  #use this to update

Test
There are some testcases.

heapinspect/tests/ $ python test.py  #this will run all test cases for you to check this tool.    ......  ......    test case unsortedbins64 at test/testcases/libc-2.27/64bit  pid:6704  =========================           fastbins           =========================  =========================         unsortedbins         =========================  chunk(0x7f9aae2e6720): prev_size=0x0      size=0xb1     fd=0x7f9aacdfbca0  bk=0x7f9aae2e6880  chunk(0x7f9aae2e6880): prev_size=0x0      size=0xb1     fd=0x7f9aae2e6720  bk=0x7f9aacdfbca0  =========================          smallbins           =========================  =========================          largebins           =========================  =========================            tcache            =========================  tcache[9]:  chunk(0x7f9aae2e6670): prev_size=0x0      size=0xb1     fd=0x7f9aae2e65d0  bk=0x0  chunk(0x7f9aae2e65c0): prev_size=0x0      size=0xb1     fd=0x7f9aae2e6520  bk=0x0  chunk(0x7f9aae2e6510): prev_size=0x0      size=0xb1     fd=0x7f9aae2e6470  bk=0x0  chunk(0x7f9aae2e6460): prev_size=0x0      size=0xb1     fd=0x7f9aae2e63c0  bk=0x0  chunk(0x7f9aae2e63b0): prev_size=0x0      size=0xb1     fd=0x7f9aae2e6310  bk=0x0  chunk(0x7f9aae2e6300): prev_size=0x0      size=0xb1     fd=0x7f9aae2e6260  bk=0x0  chunk(0x7f9aae2e6250): prev_size=0x0      size=0xb1     fd=0x0             bk=0x0  

Docs
Detailed docstrings have been written into the source code.
I have built a sphinx doc in docs. Just open docs/build/html/index.html with your browser.

Devlog

2018/12/10 Version 0.1.3

• add support for gdb

2018/11/6 version 0.1.2
docs update.

• update sphinx docs
• reshape file structure

2018/11/5 version 0.1.1
not a functional update.

• PEP8
• docstrings
• performance update

2018/10/31 version 0.1.0
first release

• better cmdline option

2018/10/30 version 0.0.8
next version will be a release.

• CRLF to LF
• code refine
• readme refine
• pretty printer

2018/10/29 version 0.0.7

• auto test
• code refine

2018/10/27 version 0.0.6
this is not a stable version. im trying to fix bugs due to different glibc. i need help to test this.

• add multi libc support
• add x86 support

2018/10/26 version 0.0.5
next version will add multi libc support. heapdiff and heap check will be added later.

• HeapShower
• relative heap & libc offset showing
• fix search loop bug
• bins now search from bk instead of fd, as the manner of glibc

2018/10/24 version 0.0.4

• HeapRecoder , I will make a heapdiff
• smallbins and largebins

2018/10/23 version 0.0.3

• fastbin prototype
• unsortedbin prototype
• bins prototype
• tcache prototype

2018/10/22 version 0.0.2

• add C_Struct to handle c structure

2018/10/19 version 0.0.1

• add class HeapInspector
• trying to parse more information of arena

2018/10/18 version 0.0.0

• add class Proc in proc_util
• experimental test in test.py

Download Heapinspect

Regards

Kang Asu