GEF - GDB Enhanced Features
GEF is a kick-ass set of commands for X86, ARM, MIPS, PowerPC and SPARC to
make GDB cool again for exploit dev. It is aimed to be used mostly by exploiters
and reverse-engineers, to provide additional features to GDB using the Python
API to assist during the process of dynamic analysis and exploit development.
It has full support for both Python2 and Python3 indifferently (as more and more
distros start pushing
gdb compiled with Python3 support).
GEF features include:
- One single GDB script.
- Entirely OS Agnostic, NO dependencies:
GEFis battery-included and is installable in 2 seconds (unlike PwnDBG).
- Fast limiting the number of dependencies and optimizing code to make the commands as fast as possible (unlike PwnDBG).
- Provides more than 50 commands to drastically change your experience in GDB.
- Easily extendable to create other commands by providing more comprehensible layout to GDB Python API.
- Works consistently on both Python2 and Python3.
- Built around an architecture abstraction layer, so all commands work in any GDB-supported architecture such as x86-32/64, ARMv5/6/7, AARCH64, SPARC, MIPS, PowerPC, etc. (unlike PEDA)
- Suited for real-life apps debugging, exploit development, just as much as CTF (unlike PEDA or PwnDBG)
Simply make sure you have GDB 7.7 or higher.
# via the install script $ wget -q -O- https://github.com/hugsy/gef/raw/master/gef.sh | sh # manually $ wget -O ~/.gdbinit-gef.py -q https://github.com/hugsy/gef/raw/master/gef.py $ echo source ~/.gdbinit-gef.py >> ~/.gdbinit
Then just start playing (for local files):
$ gdb -q /path/to/my/bin gef➤ gef help
Or (for remote debugging):
remote:~ $ gdbserver 0.0.0.0:1234 /path/to/file Running as PID: 666
local:~ $ gdb -q gef➤ gef-remote -t your.ip.address:1234 -p 666
If your host/VM is connected to the Internet, you can update
gef easily to the latest version (even without
git installed). with
python /path/to/gef.py --update
$ python ~/.gdbinit-gef.py --update Updated
If no updates are available,
gef will respond
No update instead.
This shows a few examples of new features available to you when installing
GEF, with the supported architecture.
Emulating code in GDB via Unicorn-Engine (x86-64)
Displaying ELF information, memory mapping and using Capstone/Keystone integration (ARM v6)
Automatic dereferencing of registers values and identifying binary protections (PowerPC)
Showing current context and heap information (MIPS)
Playing with Capstone engine (SPARC v9)
There are none:
GEF works out of the box! However, to enjoy all the coolest
features, it is recommended to install:
For a quick installation, simply use the
pip packaged version:
# for Python2.x $ pip2 install capstone unicorn keystone-engine ropper # for Python3.x $ pip3 install capstone unicorn keystone-engine ropper retdec-python
Just make sure you are using the
pip corresponding to the version of Python
your GDB was compiled with. If you are experiencing issues installing them,
post an issue on the GitHub of the respective projects. If your bug is not
GEF, you will not get an answer.
Bugs & Feedbacks
gdb, exploitation or other topics, feel free to join the
##gef channel on the Freenode IRC network. You can also to me (
hugsy) via the
channel. For those who do not have an IRC client (like
simply click here.
For bugs or feature requests, just go here and provide a thorough description if you want help.
GEF fully relies on GDB API and other Linux-specific sources of information
/proc/<pid>). As a consequence, some of the features might not work on
custom or hardened systems such as GrSec.
Or if you just like the tool, feel free to drop a simple "thanks" on IRC, Twitter or other, it is always very appreciated.
I love Open-Source, and just like
my other projects
I've decided to offer a :beer: 4 :bug: (a.k.a beer4bugs) bounty for
GEF, to thank everybody who helps keeping the project living and always
The rule is simple, provide a (substantial) contribution to
GEF, such as:
- Submitting a Pull-Request for a new feature/command.
- Submitting a Pull-Request for a new architecture support.
- Or sending a relevant issue request (like a bug, crash, or else).
Poke me on the IRC
##gef channel about it, and next time we meet in person
(like at a conference), I'll be happy to pay you a beer.
I do also accept beers if you think that the tool is cool! :wink: