Category: Videos

Dec 04 2014

Hacking PayPal Accounts With One Click

PayPal CSRF HackYasser H. Ali, an Egyptian security researcher, has discovered three critical vulnerabilities in PayPal website which could be used to take control of customer accounts.

Yasser explained in his post the three vulnerabilities used to breach into accounts:

1] Reusable CSRF Token :
The CSRF token “that authenticate every single request made by the user” which can be also found in the request body of every request with the parameter name “Auth” get changed with every request made by user for security measures, but after a deep investigation I found out that the CSRF Auth is Reusable for that specific user email address or username, this means If an attacker found any of these CSRF Tokens, He can then make actions in the behave of any logged in user.

2] Bypassing the CSRF Auth System :
an Attacker can obtain the CSRF Auth which can be valid for ALL users, by intercepting the POST request from a page that provide an Auth Token before the Logging-in process, check this page for the magical CSRF Auth “https://www.paypal.com/eg/cgi-bin/webscr?cmd=_send-money”. At this point the attacker Can CSRF “almost” any request on behave of this user.

3] ByPassing the Security Questions Change :
the request of setting up the security questions “which is initiated by the user while signing up” is not password-protected, and it can be reused to reset the security questions up without providing the password, hence, Armed with the CSRF Auth, an attacker can CSRF this process too and change the victim’s Security questions.

At this point, An attacker can conduct a targeted CSRF attack against a PayPal users and take a full control over his account Hence, An attacker can CSRF all the requests including but not limited to:

― Add/Remove/Confirm Email address
― Add fully privileged users to business account
― Change Security questions
― Change Billing/Shipping Address
― Change Payment methods
― Change user settings (Notifications/Mobile settings)…. and more.

Here is the Proof Of Concept Video:

The vulnerability is patched very fast and PayPal paid me the maximum bounty they give ($ 10,000 USD) ;) ” – Yasser Ali

Original Story: Yasser Ali’s Blog >> Hacking PayPal Accounts with one click

Dec 01 2014

WhatsApp – Message Handler Vulnerability Allows to Remotely Crash

WhatsApp Remote CrashA Vulnerability has been discovered in the wildly popular messaging app WhatsApp, which allows anyone to remotely crash WhatsApp just by sending a specially crafted message, two security researchers reported.

Two India based independent security researchers, Indrajeet Bhuyan and Saurav Kar, both 17-year old demonstrated the WhatsApp Message Handler vulnerability.

In a video demonstration, they showed that by sending a 2000 words (2kb) message in special character set can crash the receiver’s app. The worried impact of the vulnerability is that the user who received the specially crafted message will have to delete his/her whole conversation and start a fresh chat, because opening the message keeps on crashing WhatsApp unless the chat is deleted completely.

What makes it more serious is that one needs to delete entire chat with the person they are chatting to in order to get back whatsapp work in normal“, Bhuyan told.

According to the duo, the reported vulnerability has been tested and successfully works on most of the versions of Android Operating system including Jellybean, Kitkat, and all the below android versions.

Similarly, Any member of your WhatsApp group could intentionally send a specially crafted message to exit people from the group and delete the group. Also, for example, if I don’t want someone to keep records of my chat with them, then I can also send the same message exploit to the person.

The vulnerability has not been tested on iOS, but it is sure that all versions of WhatsApp including 2.11.431 and 2.11.432 are affected with this bug. Also the attack does not work on Windows 8.1.

Proof-of-Concept (PoC) Video

WhatsApp, bought by Facebook for $19 billion in February this year, has 600 Million users as of October 2014, and according to the researchers, an estimated number of users affected by the vulnerability could be 500 Million.

WhatsApp was in news recently for making end-to-end encryption on all text messages as a default feature in an effort to boost the online privacy and security of its users around the world. The app maker describe this move as the “largest deployment of end-to-end encryption ever.”

Sep 16 2014

Twitter Vulnerability Allows Hacker to Delete Credit Cards from any Account

Twitter Delete Credit Card VulnerabilityAt the beginning of this month, just like other social networks, Twitter also started paying individuals for any flaws they uncover on its service with a fee of $140 or more offered per flaw under its new Bug Bounty program, and here comes the claimant.

An Egyptian Security Researcher, Ahmed Aboul-Ela, who have been rewarded by many reputed and popular technology giants including Google, Microsoft and Apple, have discovered a critical vulnerability in Twitter’s advertising service that allowed him deleting credit cards from any Twitter account.

Actually he found two vulnerabilities not one but both was having the same effect and impact.

#First Vulnerability
The first vulnerability he had spotted was in the delete functionality of credit cards in payments method page

https://ads.twitter.com/accounts/[account id]/payment_methods

Twitter Vulnerability Delete Credit Card

When he choose to delete credit card and press on the delete button, an ajax POST request is sent to the server like the following:

POST /accounts/18ce53wqoxd/payment_methods/destroy HTTP/1.1
Host: ads.twitter.com
Connection: keep-alive
Content-Length: 29
Accept: /
Origin: https://ads.twitter.com
X-CSRF-Token: Lb6HONDceN5mGvAEUvCQNakJUspD60Odumz/trVdQfE=
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2062.94 Safari/537.36
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Referer: https://ads.twitter.com/accounts/18ce53wqoxd/payment_methods
Accept-Encoding: gzip,deflate
Accept-Language: en-US,en;q=0.8
Cookie: [cookies here]
account=18ce53wqoxd&id=219643

There are only two post parameters sent in request body-
account: the twitter account id
id: the credit card id and it’s numerical without any alphabetic characters

All he had to do is to change those two parameters to his twitter account id and credit card id, then reply again the request and he suddenly found that credit card have been delete from the other twitter account without any required interaction.

The funny part that the page response was “403 forbbiden” but the credit card was actually deleted from the account :D

#Second Vulnerability
Aboul-Ela found another similar vulnerability but this time the impact was higher than the previous one.
when he tried to add an invalid credit card to his twitter account it displayed an error message

“we were unable to approve the card you entered” and show a button called “Dismiss”

Hacking Twitter Delete Credit Cards

When he pressed on the Dismiss button the credit card was disappeared from his account, so he thought it have the same effect of deleteing, so he tried to add invalid credit card again and intercepted the request which looks like the following:

POST /accounts/18ce53wqoxd/payment_methods/handle_failed/220152 HTTP/1.1
Host: ads.twitter.com
Connection: keep-alive
Content-Length: 108
Cache-Control: max-age=0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Origin: https://ads.twitter.com
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2062.94 Safari/537.36
Content-Type: application/x-www-form-urlencoded
Referer: https://ads.twitter.com/accounts/18ce53wqoxd/payment_methods
Accept-Encoding: gzip,deflate
Accept-Language: en-US,en;q=0.8
Cookie: [Cookies Here]
utf8=%E2%9C%93&authenticity_token=Lb6HONDceN5mGvAEUvCQNakJUspD60Odumz%2FtrVdQfE%3D
&id=220152&dismiss=Dismiss

This time account parameter doesn’t exists and only credit card id is used.

So he changed the id in the url and body to his credit card id from other twitter account then replied the request, and guess what?
Credit card got deleted from the other twitter account !

VIDEO DEMONSTRATION:

Sep 15 2014

A 16-Year Old Invents Device that Converts Breath to Speech

TALK Converting Breath to SpeechA High-school student Arsh Shah Dilbagi has invented a portable and affordable device that converts breath into speech, helping people suffering from different developmental disabilities like locked-in syndrome, Parkinson’s, or ALS to communicate using only their breath.

A 16-year-old Dilbagi who hails from Harayana’s Panipat region in India has come up as the only entry from Asia in the 15 global finalists at the Google Science Fair 2014, a competition open to 13 to 18 year old thinkers.

This augmentative and alternative communication (AAC) device, Dilbagi dubbed it as ‘Talk’, can turn breath signals into speech using the assistance of Morse code. This innovative device can be used by people with developmental disabilities whose communication abilities are impaired.

Over 1.4 percent of the world’s total population suffers from some disorder that renders victims almost completely paralyzed, making them difficult in speaking and forcing them to use an augmentative and alternative communication (AAC) device to communicate with others.

EASILY AFFORDABLE – JUST $80
A majority of AAC devices use eye tracking in order to help people communicate with each other, but according to Dilbagi, the amateur inventor, most of those devices are very expensive, very expensive, slow and bulky, so in an effort to create a device that offers faster and more affordable alternative to victims, he invented “Talk.” It took him three months of research and another seven months to build the final prototype.

The device uses a basic $25 Arduino microcontroller, and the total invention costs only $80 (Rs 5000) about a hundred times less than the sort of Augmentative and Alternative Communication device used by Stephen Hawking, making it affordable to the large number of population.

HOW TALK WORKS
The device translates breath signals into electric signals using a special device called MEMS Microphone. This technology uses a pressure-sensitive diaphragm etched directly onto a silicon microchip, and an amplifying device to increase the sound of the user’s breath.

Breath to Speech Converter

The user is required to give two distinguishable exhales, varying in intensity or time, so that they can spell words out using the assistance of Morse code. The morse code can either be translated into English, or specific commands and phrases. The device features nine different voices varying in age and gender.

A microprocessor is used to interpret these breathes into dots and dashes that converts them into words. Once the breath is converted into words, they are sent to a second microprocessor that then converts them into voice.

VIDEO DEMONSTRATION
You can see the video demonstration of the device in which Dilbagi is explaining about the device.

Jan 12 2014

MIT University Website Defaced by Anonymous Hackers in Honor of Aaron Swartz

Aaron Swartz Last year on January 11, a 26-year-old, young hacker, Reddit co-founder and the digital Activist, Aaron H. Swartz committed suicide.
He found dead in his Brooklyn, New York apartment, where he had hanged himself.

Swartz was indicted by a federal grand jury in July 2011, accused of hacking the MIT JSTOR database and stealing over four million documents with the intent to distribute them. He could have prison for 50 years and $4 million in fines by the Court, but before that he committed suicide in fear. Swartz’s father, Robert, later blamed the MIT and the judiciary system for his son’s death.

On the first Anniversary of Aaron Swartz, today the Anonymous group of hackers defaced the sub-domain of the Massachusetts Institute of Technology (MIT) website (http://cogen.mit.edu/) for about an hour as part of #OPLASTRESORT. Defacement page was titled ‘THE DAY WE FIGHT BACK’. The message posted on it, “Remember The Day We Fight Back, Remember. We Never Forget, We Never Surrender, Expect Us.”

Anonymous OpLastResort

The attack on the website of MIT is a part of the tragic suicide of hacker Aaron Swartz to give him tribute.

It was the MIT’s role in the federal prosecution against an activist, which ultimately led to him committing suicide, but the U.S Government has not learned anything and they are planning to make laws stricter against hackers.

Recently, The Senate Judiciary Committee Chairman ‘Patrick Leahy’ reintroduced a revamped version of the “Personal Data Privacy and Security Act” for tough criminal penalties for hackers. The new bill suggests 20 years in prison, rather than 10 years (currently) and also recommending to give same penalties for the hackers who even attempt to hack the systems, but doesn’t succeed.