Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Comments
PayPal Two-Factor Authentication Broken
Newest First  |  Oldest First  |  Threaded View
securityaffairs
50%
50%
securityaffairs,
User Rank: Ninja
6/25/2014 | 6:45:18 PM
Re: corrected point of sale process
The flaw is related to PayPal implementation for mobile platforms of 2FA mechanism.

Concerning it the time that will pass until the planned final fix (July).

Anyway PayPal has already implemented a temporary fix to protect its customers properly managing the session token and to avoid attackers to transfer victim's money.

 
Kelly Jackson Higgins
50%
50%
Kelly Jackson Higgins,
User Rank: Strategist
6/25/2014 | 12:44:51 PM
Re: corrected point of sale process
Great question, @BurgessCT. PayPal didn't say, but they are taking responsibility for the patch. 
BurgessCT
50%
50%
BurgessCT,
User Rank: Apprentice
6/25/2014 | 11:45:17 AM
Re: corrected point of sale process
Good piece Kelly - my question is did PayPal roll-their-own 2FA or did this flaw come from a partner's implementation of 2FA for the application?  

Context - I and other small business owners lack the resources of a company like (ebay/paypal) and thus recognizing the level of effort to roll-your-own for a good 2FA is important.

Thanks for the piece, Duo's commentary is much appreciated.
Marilyn Cohodas
50%
50%
Marilyn Cohodas,
User Rank: Strategist
6/25/2014 | 10:14:12 AM
Re: corrected point of sale process
Sounds like something to keep on the radar...
Kelly Jackson Higgins
100%
0%
Kelly Jackson Higgins,
User Rank: Strategist
6/25/2014 | 9:10:29 AM
Re: corrected point of sale process
Hmmm...good question. I'm not aware of any others (but that doesn't mean there haven't been any), and Duo Security says they expect to find similar issues in other mobile apps.
Marilyn Cohodas
50%
50%
Marilyn Cohodas,
User Rank: Strategist
6/25/2014 | 9:08:52 AM
Re: corrected point of sale process
Kelly, to your knowledge, how common are 2FA flaws? Is this the next big thing?
Kelly Jackson Higgins
50%
50%
Kelly Jackson Higgins,
User Rank: Strategist
6/25/2014 | 8:37:57 AM
Re: corrected point of sale process
The "good news" here is that PayPal is working on a fix. In the meantime, 2FA is disabled for mobile, so authentication is old-school for now with iOS and Android.
macker490
100%
0%
macker490,
User Rank: Ninja
6/25/2014 | 8:34:44 AM
corrected point of sale process
Fixing the Point of Sale Terminal (POST)

THINK: when you use your card: you are NOT authorizing ONE transaction: you are giving the merchant INDEFINITE UNRESTRICTED access to your account.

if the merchant is hacked the card numbers are then sold on the black market. hackers then prepare bogus cards -- with real customer numbers -- and then send "mules" out to purchase high value items -- that can be resold

it's a rough way to scam cash and the "mules" are most likely to get caught -- not the hackers who compromised the merchants' systems .


The POST will need to be re-designed to accept customer "Smart Cards"

The Customer Smart Card will need an on-board processor, -- with PGP

When the customer presents the card it DOES NOT send the customer's card number to the POST.  Instead, the POST will submit an INVOICE to the customer's card.  On customer approval the customer's card will encrypt the invoice together with authorization for payment to the PCI ( Payment Card Industry Card Service Center ) for processing and forward the cipher text to the POST

Neither the POST nor the merchant's computer can read the authorizing message because it is PGP encrypted for the PCI service.  Therefore the merchant's POST must forward the authorizing message cipher text to the PCI service center.

On approval the PCI Service Center will return an approval note to the POST and an EFT from the customer's account to the merchant's account.

The POST will then print the PAID invoice.  The customer picks up the merchandise and the transaction is complete.

The merchant never knows who the customer was: the merchant never has ANY of the customer's PII data.

Cards are NOT updated.  They are DISPOSABLE and are replaced at least once a year -- when the PGP signatures are set to expire.  Note that PGP signatures can also be REVOKED if the card is lost.

Transactions are Serialized using a Transaction Number ( like a check number ) plus date and time of origination.    This to prevent re-use of transactions.   A transaction authorizes one payment only not a cash flow.

~~~


COVID-19: Latest Security News & Commentary
Dark Reading Staff 10/27/2020
Modern Day Insider Threat: Network Bugs That Are Stealing Your Data
David Pearson, Principal Threat Researcher,  10/21/2020
Are You One COVID-19 Test Away From a Cybersecurity Disaster?
Alan Brill, Senior Managing Director, Cyber Risk Practice, Kroll,  10/21/2020
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
Special Report: Computing's New Normal
This special report examines how IT security organizations have adapted to the "new normal" of computing and what the long-term effects will be. Read it and get a unique set of perspectives on issues ranging from new threats & vulnerabilities as a result of remote working to how enterprise security strategy will be affected long term.
Flash Poll
How IT Security Organizations are Attacking the Cybersecurity Problem
How IT Security Organizations are Attacking the Cybersecurity Problem
The COVID-19 pandemic turned the world -- and enterprise computing -- on end. Here's a look at how cybersecurity teams are retrenching their defense strategies, rebuilding their teams, and selecting new technologies to stop the oncoming rise of online attacks.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-5144
PUBLISHED: 2020-10-28
SonicWall Global VPN client version 4.10.4.0314 and earlier allows unprivileged windows user to elevate privileges to SYSTEM through loaded process hijacking vulnerability.
CVE-2020-5145
PUBLISHED: 2020-10-28
SonicWall Global VPN client version 4.10.4.0314 and earlier have an insecure library loading (DLL hijacking) vulnerability. Successful exploitation could lead to remote code execution in the target system.
CVE-2020-27956
PUBLISHED: 2020-10-28
An Arbitrary File Upload in the Upload Image component in SourceCodester Car Rental Management System 1.0 allows the user to conduct remote code execution via admin/index.php?page=manage_car because .php files can be uploaded to admin/assets/uploads/ (under the web root).
CVE-2020-27957
PUBLISHED: 2020-10-28
The RandomGameUnit extension for MediaWiki through 1.35 was not properly escaping various title-related data. When certain varieties of games were created within MediaWiki, their names or titles could be manipulated to generate stored XSS within the RandomGameUnit extension.
CVE-2020-16140
PUBLISHED: 2020-10-27
The search functionality of the Greenmart theme 2.4.2 for WordPress is vulnerable to XSS.