Personal blog of Yzmir Ramirez

If the definition of insanity is doing the same thing over and over and expecting a different outcome, then one might say the cybersecurity industry is insane.

Criminals continue to innovate with highly sophisticated attack methods, but many security organizations still use the same technological approaches they did 10 years ago. The world has changed, but cybersecurity hasn’t kept pace.

Distributed systems, with people and data everywhere, mean the perimeter has disappeared. And the hackers couldn’t be more excited. The same technology approaches, like correlation rules, manual processes and reviewing alerts in isolation, do little more than remedy symptoms while hardly addressing the underlying problem.

Credentials are supposed to be the front gates of the castle, but as the SOC is failing to change, it is failing to detect. The cybersecurity industry must rethink its strategy to analyze how credentials are used and stop breaches before they become bigger problems.

It’s all about the credentials

Compromised credentials have long been a primary attack vector, but the problem has only grown worse in the midpandemic world. The acceleration of remote work has increased the attack footprint as organizations struggle to secure their network while employees work from unsecured connections. In April 2020, the FBI said that cybersecurity attacks reported to the organization grew by 400% compared to before the pandemic. Just imagine where that number is now in early 2021.

It only takes one compromised account for an attacker to enter the active directory and create their own credentials. In such an environment, all user accounts should be considered as potentially compromised.

Nearly all of the hundreds of breach reports I’ve read have involved compromised credentials. More than 80% of hacking breaches are now enabled by brute force or the use of lost or stolen credentials, according to the 2020 Data Breach Investigations Report. The most effective and commonly-used strategy is credential stuffing attacks, where digital adversaries break in, exploit the environment, then move laterally to gain higher-level access.

A newly discovered bug in a cloud system used to manage SonicWall firewalls could have allowed hackers to break into thousands of corporate networks.

Enterprise firewalls and virtual private network appliances are vital gatekeepers tasked with protecting corporate networks from hackers and cyberattacks while still letting in employees working from home during the pandemic. Even though most offices are empty, hackers frequently look for bugs in critical network gear in order to break into company networks to steal data or plant malware.

Vangelis Stykas, a researcher at security firm Pen Test Partners, found the new bug in SonicWall’s Global Management System (GMS), a web app that lets IT departments remotely configure their SonicWall devices across the network.

But the bug, if exploited, meant any existing user with access to SonicWall’s GMS could create a user account with access to any other company’s network without permission.

From there, the newly created account could remotely manage the SonicWall gear of that company.

In a blog post shared with TechCrunch, Stykas said there were two barriers to entry. Firstly, a would-be attacker would need an existing SonicWall GMS user account. The easiest way — and what Stykas did to independently test the bug — was to buy a SonicWall device.

The second issue was that the would-be attacker would also need to guess a unique seven-digit number associated with another company’s network. But Stykas said that this number appeared to be sequential and could be easily enumerated, one after the other.

Once inside a company’s network, the attacker could deliver ransomware directly to the internal systems of their victims, an increasingly popular tactic for financially driven hackers.

SonicWall confirmed the bug is now fixed. But Stykas criticized the company for taking more than two weeks to patch the vulnerability, which he described as “trivial” to exploit.

“Even car alarm vendors have fixed similar issues inside three days of us reporting,” he wrote.

A SonicWall spokesperson defended the decision to subject the fix to a “full” quality check before it was rolled out, and said it is “not aware” of any exploitation of the vulnerability.