Posts Tagged: Alissa Knight


27
Aug 19

Cybersecurity Firm Imperva Discloses Breach

Imperva, a leading provider of Internet firewall services that help Web sites block malicious cyberattacks, alerted customers on Tuesday that a recent data breach exposed email addresses, scrambled passwords, API keys and SSL certificates for a subset of its firewall users.

Redwood Shores, Calif.-based Imperva sells technology and services designed to detect and block various types of malicious Web traffic, from denial-of-service attacks to digital probes aimed at undermining the security of Web-based software applications.

Image: Imperva

Earlier today, Imperva told customers that it learned on Aug. 20 about a security incident that exposed sensitive information for some users of Incapsula, the company’s cloud-based Web Application Firewall (WAF) product.

“On August 20, 2019, we learned from a third party of a data exposure that impacts a subset of customers of our Cloud WAF product who had accounts through September 15, 2017,” wrote Heli Erickson, director of analyst relations at Imperva.

“We want to be very clear that this data exposure is limited to our Cloud WAF product,” Erickson’s message continued. “While the situation remains under investigation, what we know today is that elements of our Incapsula customer database from 2017, including email addresses and hashed and salted passwords, and, for a subset of the Incapsula customers from 2017, API keys and customer-provided SSL certificates, were exposed.”

Companies that use the Incapsula WAF route all of their Web site traffic through the service, which scrubs the communications for any suspicious activity or attacks and then forwards the benign traffic on to its intended destination.

Rich Mogull, founder and vice president of product at Kansas City-based cloud security firm DisruptOps, said Imperva is among the top three Web-based firewall providers in business today.

According to Mogull, an attacker in possession of a customer’s API keys and SSL certificates could use that access to significantly undermine the security of traffic flowing to and from a customer’s various Web sites.

At a minimum, he said, an attacker in possession of these key assets could reduce the security of the WAF settings and exempt or “whitelist” from the WAF’s scrubbing technology any traffic coming from the attacker. A worst-case scenario could allow an attacker to intercept, view or modify traffic destined for an Incapsula client Web site, and even to divert all traffic for that site to or through a site owned by the attacker. Continue reading →


5
Aug 19

The Risk of Weak Online Banking Passwords

If you bank online and choose weak or re-used passwords, there’s a decent chance your account could be pilfered by cyberthieves — even if your bank offers multi-factor authentication as part of its login process. This story is about how crooks increasingly are abusing third-party financial aggregation services like Mint, PlaidYodlee, YNAB and others to surveil and drain consumer accounts online.

Crooks are constantly probing bank Web sites for customer accounts protected by weak or recycled passwords. Most often, the attacker will use lists of email addresses and passwords stolen en masse from hacked sites and then try those same credentials to see if they permit online access to accounts at a range of banks.

A screenshot of a password-checking tool being used to target Chase Bank customers who re-use passwords from other sites. Image: Hold Security.

From there, thieves can take the list of successful logins and feed them into apps that rely on application programming interfaces (API)s from one of several personal financial data aggregators which help users track their balances, budgets and spending across multiple banks.

A number of banks that do offer customers multi-factor authentication — such as a one-time code sent via text message or an app — have chosen to allow these aggregators the ability to view balances and recent transactions without requiring that the aggregator service supply that second factor. That’s according to Brian Costello, vice president of data strategy at Yodlee, one of the largest financial aggregator platforms.

Costello said while some banks have implemented processes which pass through multi-factor authentication (MFA) prompts when consumers wish to link aggregation services, many have not.

“Because we have become something of a known quantity with the banks, we’ve set up turning off MFA with many of them,” Costello said.  “Many of them are substituting coming from a Yodlee IP or agent as a factor because banks have historically been relying on our security posture to help them out.”

Such reconnaissance helps lay the groundwork for further attacks: If the thieves are able to access a bank account via an aggregator service or API, they can view the customer’s balance(s) and decide which customers are worthy of further targeting.

This targeting can occur in at least one of two ways. The first involves spear phishing attacks to gain access to that second authentication factor, which can be made much more convincing once the attackers have access to specific details about the customer’s account — such as recent transactions or account numbers (even partial account numbers).

The second is through an unauthorized SIM swap, a form of fraud in which scammers bribe or trick employees at mobile phone stores into seizing control of the target’s phone number and diverting all texts and phone calls to the attacker’s mobile device.

But beyond targeting customers for outright account takeovers, the data available via financial aggregators enables a far more insidious type of fraud: The ability to link the target’s bank account(s) to other accounts that the attackers control.

That’s because PayPal, Zelle, and a number of other pure-play online financial institutions allow customers to link accounts by verifying the value of microdeposits. For example, if you wish to be able to transfer funds between PayPal and a bank account, the company will first send a couple of tiny deposits  — a few cents, usually — to the account you wish to link. Only after verifying those exact amounts will the account-linking request be granted. Continue reading →