Direito - Unip - DNA 2,03/08

Direito Unip - DNA 2,3/08 · às 1/19/2024

Just connecting to the service, a 64bit cpu registers dump is received, and so does several binary code as you can see:

The registers represent an initial cpu state, and we have to reply with the registers result of the binary code execution. This must be automated becouse of the 10 seconds server socket timeout.

The exploit is quite simple, we have to set the cpu registers to this values, execute the code and get resulting registers.

In python we created two structures for the initial state and the ending state.

cpuRegs = {'rax':'','rbx':'','rcx':'','rdx':'','rsi':'','rdi':'','r8':'','r9':'','r10':'','r11':'','r12':'','r13':'','r14':'','r15':''}
finalRegs = {'rax':'','rbx':'','rcx':'','rdx':'','rsi':'','rdi':'','r8':'','r9':'','r10':'','r11':'','r12':'','r13':'','r14':'','r15':''}

We inject at the beginning several movs for setting the initial state:

for r in cpuRegs.keys():

code.append('mov %s, %s' % (r, cpuRegs[r]))

The 64bit compilation of the movs and the binary code, but changing the last ret instruction by a sigtrap "int 3"

We compile with nasm in this way:

os.popen('nasm -f elf64 code.asm')

os.popen('ld -o code code.o ')

And use GDB to execute the code until the sigtrap, and then get the registers

fd = os.popen("gdb code -ex 'r' -ex 'i r' -ex 'quit'",'r')

for l in fd.readlines():

for x in finalRegs.keys():

...

We just parse the registers and send the to the server in the same format, and got the key.

The code:

from libcookie import *

from asm import *

import os

import sys

host = 'catwestern_631d7907670909fc4df2defc13f2057c.quals.shallweplayaga.me'

port = 9999

cpuRegs = {'rax':'','rbx':'','rcx':'','rdx':'','rsi':'','rdi':'','r8':'','r9':'','r10':'','r11':'','r12':'','r13':'','r14':'','r15':''}

finalRegs = {'rax':'','rbx':'','rcx':'','rdx':'','rsi':'','rdi':'','r8':'','r9':'','r10':'','r11':'','r12':'','r13':'','r14':'','r15':''}

fregs = 15

s = Sock(TCP)

s.timeout = 999

s.connect(host,port)

data = s.readUntil('bytes:')

#data = s.read(sz)

#data = s.readAll()

sz = 0

for r in data.split('\n'):

for rk in cpuRegs.keys():

if r.startswith(rk):

cpuRegs[rk] = r.split('=')[1]

if 'bytes' in r:

sz = int(r.split(' ')[3])

binary = data[-sz:]

code = []

print '[',binary,']'

print 'given size:',sz,'bin size:',len(binary)

print cpuRegs

for r in cpuRegs.keys():

code.append('mov %s, %s' % (r, cpuRegs[r]))

#print code

fd = open('code.asm','w')

fd.write('\n'.join(code)+'\n')

fd.close()

Capstone().dump('x86','64',binary,'code.asm')

print 'Compilando ...'

os.popen('nasm -f elf64 code.asm')

os.popen('ld -o code code.o ')

print 'Ejecutando ...'

fd = os.popen("gdb code -ex 'r' -ex 'i r' -ex 'quit'",'r')

for l in fd.readlines():

for x in finalRegs.keys():

if x in l:

l = l.replace('\t',' ')

try:

i = 12

spl = l.split(' ')

if spl[i] == '':

i+=1

print 'reg: ',x

finalRegs[x] = l.split(' ')[i].split('\t')[0]

except:

print 'err: '+l

fregs -= 1

if fregs == 0:

#print 'sending regs ...'

#print finalRegs

buff = []

for k in finalRegs.keys():

buff.append('%s=%s' % (k,finalRegs[k]))

print '\n'.join(buff)+'\n'

print s.readAll()

s.write('\n'.join(buff)+'\n\n\n')

print 'waiting flag ....'

print s.readAll()

print '----- yeah? -----'

s.close()

fd.close()

s.close()

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Direito Unip - DNA 2,3/08 · às 1/19/2024

Just a week after Apple released its brand new iPhone X on November 3, a team of researchers has claimed to successfully hack Apple's Face ID facial recognition technology with a mask that costs less than $150. They said Apple iPhone x face id can be hacked with silicon mask easily.

apple iPhone x face id hacked
Yes, Apple's "ultra-secure" Face ID security for the iPhone X is not as secure as the company claimed during its launch event in September this year.

"Apple engineering teams have even gone and worked with professional mask makers and makeup artists in Hollywood to protect against these attempts to beat Face ID," Apple's senior VP of worldwide marketing Phil Schiller said about Face ID system during the event.

"These are actual masks used by the engineering team to train the neural network to protect against them in Face ID."

However, the bad news is that researchers from Vietnamese cybersecurity firm Bkav were able to unlock the iPhone X using a mask.

Yes, Bkav researchers have a better option than holding it up to your face while you sleep. Bkav researchers re-created the owner's face through a combination of 3D printed mask, makeup, and 2D images with some "special processing done on the cheeks and around the face, where there are large skin areas" and the nose is created from silicone.

The researchers have also published a proof-of-concept video, showing the brand-new iPhone X first being unlocked using the specially constructed mask, and then using the Bkav researcher's face, in just one go.

"Many people in the world have tried different kinds of masks but all failed. It is because we understand how AI of Face ID works and how to bypass it," an FAQ on the Bkav website said.

"You can try it out with your own iPhone X, the phone shall recognize you even when you cover a half of your face. It means the recognition mechanism is not as strict as you think, Apple seems to rely too much on Face ID's AI. We just need a half face to create the mask. It was even simpler than we ourselves had thought."

Researchers explain that their "proof-of-concept" demo took about five days after they got iPhone X on November 5th. They also said the demo was performed against one of their team member's face without training iPhone X to recognize any components of the mask.

"We used a popular 3D printer. The nose was made by a handmade artist. We use 2D printing for other parts (similar to how we tricked Face Recognition 9 years ago). The skin was also hand-made to trick Apple's AI," the firm said.

The security firm said it cost the company around $150 for parts (which did not include a 3D printer), though it did not specify how many attempts its researchers took them to bypass the security of Apple's Face ID.

It should be noted that creating such a mask to unlock someone's iPhone is a time-consuming process and it is not possible to hack into a random person's iPhone.

However, if you prefer privacy and security over convenience, we highly recommend you to use a passcode instead of fingerprint or Face ID to unlock your phone.

Holiday gift guides always struggle when faced with nailing down a list for hackers — that's because hackers are as diverse in their interests and fascinations as they are diverse in gender, color, size and everything else. Someone with a multi-focused set of curiosity and unique gifts for finding out what makes the crackable crack may seem like a daunting individual to stuff a stocking for … but don't fret. With a keen eye on the latest interests in hacker culture, we've got a gift guide that can make the hacker in your life smile as they enjoy using your gift to hack and explore throughout the coming year.

Anonymity online: The Onion Pi

One of the most popular "snake oil" (fake) privacy gadgets is the so-called "Tor in a box" — a plug-and-play gadget that promises to make you anonymous online. Nearly all of these are made by clueless charlatans whose products put you at risk for privacy and security breaches. But your favorite hacker can just make or build an "Onion Pi" for $69.95, and with this free tutorial.

Attribution Dice

With Attribution Dice ($20), anyone can be a high-priced security consultant, and predict breach headlines before PR firms have a chance to feed them to reporters! With every security breach, hackers roll their eyes when headlines and PR firms roll out the same old, same old terms, methods and culprits. Instead of rolling eyes, your hacker can roll the dice, and wow friends, family, and neighbors with their hacker cyber-powers.

21 Bitcoin Computer

Money is always a welcome gift. Give the gift of going hands-on with Bitcoin with the 21 Bitcoin Computer. "The 21 Bitcoin Computer is ideal for buying and selling digital goods and services. You can use it to create bitcoin-payable APIs, set up your own personal digital goods store, pay people to share your content online, or host online games of skill." It's not cheap ($395) and comes with controversy, but it's a cool toy with a lot of potential, and 21 Inc. is going to be releasing an open source package for the device soon.

Gentleman's Bogota Lockpicks and Clear Practice Lock

Conventional wisdom suggests that all hackers know how to pick locks, but can they do it in style? A perfect stocking stuffer for slick hackers of all genders is the Gentleman's Bogota lockpick set ($34.95). These featherweights pin discreetly to a collar, hat, sleeve, vest, hemline, or wherever they choose. If the hacker you're shopping for wants to learn to lockpick, or just brush up on technique, throw in the clever Clear Practice Lock ($34.95).

Inverse Path USB Armory

Iemhacker-hacking-news-tutorial-hackernews

In this reviewer's opinion, every hacker should have a USB Armory in their stocking this year. The Inverse Path USB Armory ($130) is a little USB stick with an entire computer onboard (800MHz ARM processor, 512MB RAM), designed to be a portable platform for personal security applications — and lives up to its reputation as "the Swiss Army Knife of security devices."

Hack-A-Day Gift Card

The cornerstone of hacker culture Hack-A-Day has a store offering gift cards and merchandise a-plenty. In it, you'll find a Bukito portable 3D printer ($899.97), ever-popular Facedancer21 and Gootfet42, a low energy Bluetooth Arduino microcontroller called the Lightblue Bean, and the pocket-sized open source robot arm, Mearm.

Hackers 20th Anniversary Blu-Ray Edition

Hack the planet! The 20th anniversary of influential 1995 cyberpunk film "Hackers" was this year, and this cult classic got a special edition Blu-ray release, making it the must-have for the hackers in your life. The 20th anniversary "Hackers" Blu-ray features an hour-long "making of" documentary, rich video and audio transfer for the film itself, and interviews with: Cast members Matthew Lillard, Fisher Stevens, and Penn Jillette; hacking consultants Nicholas Jarecki and Emmanuel Goldstein; Director Iain Softley, and many more involved with the film's production and style.

A Hacker's hope for better sleep: The Re-Timer

Iemhacker-Top-10-Great-gifts-For-hackers

Hackers are increasingly hacking themselves to make their own systems run better, and one thing hackers struggle with is their sleep cycles and feeling rested. Something that can help out is the Re-Timer ($299), a retro-future looking set of glasses and kit that adjusts the circadian rhythm and suppresses the body's production of melatonin (the sleepy hormone our bodies produce which makes us feel tired). Based on 25 years of research and on the market worldwide for three years, the Re-Timer has its own jet lag calculator app, as well as its Sleep App for Fitbit that makes a customized schedule based on actual sleep tracked.

USB Rubber Ducky Deluxe and LAN Turtle

Iemhacker-USB-Rubber-ducky-delux-LAN-turtle

A longtime favorite with hackers, penetration testers and IT professionals, the USB Rubber Ducky Deluxe ($42.99)is a cross-platform (Windows, Mac, Linux, Android) testing and experimentation device that is detected as a keyboard — imagine the possibilities. This stocking stuffer pairs well with its animal friend LAN Turtle ($50), a covert sysadmin and pentest tool for remote access, network intel gathering, and man-in-the-middle monitoring through a simple graphic shell (all in a generic USB ethernet adapter case).

TechShop Gift Certificate

Give the gift of hacking and making: A gift certificate to a TechShop. "Part fabrication and prototyping studio, part hackerspace, and part learning center, TechShop provides access to over $1 million worth of professional equipment and software. We offer comprehensive instruction and expert staff to ensure you have a safe, meaningful and rewarding experience." There are TechShops in Arizona, California, Michigan, Missouri, Pennsylvania, Texas, and Virginia/Washington, D.C. (some states have multiple locations). Future locations include St. Louis, MO and Paris, France.

Products to avoid

If you see these products, run! You're better off with a lump of coal. Don't waste precious holiday money on "snake oil" privacy and security products like these:

Anonabox
Wemagin
Webcloak
iGuardian (now SHIELD)
LogMeOnce
Sever: The Anti-Villain Box

More info

Direito - Unip - DNA 2,03/08

sexta-feira, 19 de janeiro de 2024

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