Wi-Fi devices going back to 1997 are vulnerable to attackers who can steal your data if they’re in range.

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Today, Microsoft released a highly critical vulnerability (CVE-2021-31166) in its web server http.sys. This product is a Windows-only HTTP server which can be run standalone or in conjunction with IIS (Internet Information Services) and is used to broker internet traffic via HTTP network requests. The vulnerability is very similar to CVE-2015-1635, another Microsoft vulnerability in the HTTP network stack reported in 2015.

With a CVSS score of 9.8, the vulnerability announced has the potential to be both directly impactful and is also exceptionally simple to exploit, leading to a remote and unauthenticated denial-of-service (Blue Screen of Death) for affected products.

The issue is due to Windows improperly tracking pointers while processing objects in network packets containing HTTP requests. As HTTP.SYS is implemented as a kernel driver, exploitation of this bug will result in at least a Blue Screen of Death (BSoD), and in the worst-case scenario, remote code execution, which could be wormable. While this vulnerability is exceptional in terms of potential impact and ease of exploitation, it remains to be seen whether effective code execution will be achieved. Furthermore, this vulnerability only affects the latest versions of Windows 10 and Windows Server (2004 and 20H2), meaning that the exposure for internet-facing enterprise servers is fairly limited, as many of these systems run Long Term Servicing Channel (LTSC) versions, such as Windows Server 2016 and 2019, which are not susceptible to this flaw.

At the time of this writing, we are unaware of any “in-the-wild” exploitation for CVE-2021-31166 but will continue to monitor the threat landscape and provide relevant updates. We urge Windows users to apply the patch immediately wherever possible, giving special attention to externally facing devices that could be compromised from the internet. For those who are unable to apply Microsoft’s update, we are providing a “virtual patch” in the form of a network IPS signature that can be used to detect and prevent exploitation attempts for this vulnerability.

McAfee Network Security Platform (NSP) Protection
Sigset Version: 10.8.21.2
Attack ID: 0x4528f000
Attack Name: HTTP: Microsoft HTTP Protocol Stack Remote Code Execution Vulnerability (CVE-2021-31166)

McAfee Knowledge Base Article KB94510:
https://kc.mcafee.com/corporate/index?page=content&id=KB94510

 

 

The post Major HTTP Vulnerability in Windows Could Lead to Wormable Exploit appeared first on McAfee Blogs.

SOCwise Weighs In

When the infamous Carbanak cyberattack rattled an East European bank three years ago this month few would have guessed it would later play a starring role in the MITRE Engenuity enterprise evaluations of cybersecurity products from ourselves and 28 other vendors. We recently shared the results of this extensive testing and in a SOCwise discussion we turn to our SOCwise experts for insights into what this unprecedented exercise may mean for SOC teams assessing both strategy concerns and their tactical effectiveness.

Carbanak is a clever opponent known for innovative attacks on banks. FIN7 uses the similar malware and strategy of effective espionage and stealth   to target U.S. retail, restaurant and hospitality sectors, according to MITRE Engenuity, and both were highlighted in this emulation. These notorious actors have reportedly stolen more than $1 billion worldwide over the past five years. An annual event, the four-day ATT&CK Evaluation spanned 20 major steps and 174 sub-steps of the MITRE framework.

The first thing to realize about this exercise is few enterprises could ever hope to match its scope. What do you get when you match up red and blue teams? “I have not been through an exercise like that in an organization with both the red team and blue teams operationally trying to determine what their strengths and weaknesses are,” said Colby Burkett, McAfee XDR architect, a participant in the event, on our recent SOCwise episode. “And that was fantastic.”

A lot of SOC teams conduct vulnerability assessments and penetration testing, but never emulate these types of behaviors, noted Ismael Valenzuela, McAfee’s Sr. Principal Engineer and co-host of SOCwise. And, he adds that many organizations lack the resources and skills to do purple-teaming exercises.

While our SOCwise team raved about the value of conducting broad scale purple-team exercises, they expressed concern that the emphasis on “visibility” is no more valuable than “actionability.” McAfee, which scored 87% on visibility, one of the industry’s best, turned in a remarkable 100% on prevention in the MITRE Engenuity evaluations.

Illuminating Visibility

When we think about visibility, we think about how much useful information we can provide to SOC analysts when an attack is underway. There may be a tsunami of attack data entering SOCs, but it’s only actionable when the data that’s presented to analysts is relevant, noted Jesse Netz, Principal Engineer at McAfee.

A well-informed SOC finds a sweet spot on an axis where the number of false positives is low enough and the true positives are high enough “where you can actually do something about it,” added Netz.

He believes that for SOC practitioners, visibility is only part of the conversation. “How actionable is the data you’re getting? How usable is the platform in which that data is being presented to you?”

For example, in the evaluation we saw McAfee’s MVISION EDR preserve actionability and reduce alert fatigue. We excelled in the five capabilities that matter most to SOC teams: time-based security, alert actionability, detection in depth, protection, and visibility.

If you can’t do anything about the information you obtain, your results aren’t really useful in any way. In this regard, prevention also trumps visibility. “It’s great that we can see and gain visibility into what’s happening,” explained Netz. “But it’s even better at the end of the day as a security practitioner to be able to prevent it.”

Expanding the Scope

The SOCwise team overall applauded the progressively sophisticated approach taken by the MITRE Engenuity enterprise evaluations of cybersecurity products—now in its third year. However, our panel of experts noted that this round of testing was more about defending endpoints, rather than cloud-based operations, which are fairly central to defending today’s enterprise. They expect that focus may change in the future.

The MITRE Engenuity enterprise evaluations provide a lot of useful data, but they should never be the single deciding factor in a cybersecurity product purchase decision. “Use it as a component of your evaluation arsenal,” advises Netz. “It’ll help to provide kind of statistics around visibility capabilities in this latest round, including some detection capabilities as well, but be focused on the details and make sure you’re getting your information from multiple sources.”

For instance, Carbanak and FIN 7 attacks may not be relevant to your particular organization, especially if they’re centered on Cloud-based operations.

While no emulation can perfectly replicate the experience of battling real-time, zero-day threats, McAfee’s Valenzuela believes these evaluations deliver tremendous value to both our customers and our threat content engineers.

 

The post What the MITRE Engenuity ATT&CK® Evaluations Means to SOC Teams appeared first on McAfee Blogs.

When you open your laptop or your mobile device, what is the first thing you do? Do you head to your favorite social media site to skim the latest news, or do you place your weekly grocery delivery order? No matter what your daily online habits are, even the slightest degree of caution can go a long way in staying secure online. That’s because hackers are experts at hiding malware in your everyday online routines, or even infiltrating your cookies to steal login information and learn about your personal preferences. According to a StatsCan Canadian internet use survey, six out of ten internet users reported experiencing a cybersecurity incident. There are many hoops to jump through when navigating the digital landscape. By taking the necessary steps to remedy vulnerabilities in your digital activity, you can dramatically improve your online protection. 

3 Online Threats to Watch Out For 

Cybercriminals take advantage of online users through routine avenues you would not expect. Here are three common ways that cybercriminals eavesdrop on online users. 

1. Adware 

Adware, or advertising-supported software, generates ads in the user interface of a person’s device. Adware is most often used to generate revenue for the developer by targeting unsuspecting online users with personalized ads paid by third parties. These third parties usually pay per view, click, or application installation.  

Though not always malicious, adware crosses into dangerous territory when it is downloaded without a user’s consent and has nefarious intent. In this case, the adware becomes known as a potentially unwanted application (PUA) that can remain undetected on users’ devices for long periods of time. According to a report by the Cybersecure Policy Exchange, an unintentionally installed or downloaded computer virus or piece of malware is one of the top five cybercrimes that Canadians experience. The PUA can then create issues like frequent crashes and slow performance.  

Users unknowingly download adware onto their device when they download a free ad-supported program or visit a non-secure site that does not use the Hypertext Transfer Protocol Secure (HTTPS) to encrypt online communication.  

2. Malvertising 

Hackers also use invasive tactics known as ad injections, where they inject ads with malicious code for increased monetary gain. This is a practice known as “malvertising.” If a user clicks on a seemingly legitimate and well-placed ad, they risk exposing themselves to numerous online threats. These ads can be infected with malware such as viruses or spyware. For example, hackers can exploit browser vulnerabilities to download malware, steal information about the device system, and gain control over its operations. Hackers can also use malvertising to run fraudulent tech support scams, steal cookie data, or sell information to third-party ad networks. 

3. Autofill 

Another vulnerability that many may not realize is their browser’s built-in autofill functions. As tempting as it is to use your browser’s autofill function to populate a long-form, this shortcut may not be safe. Cybercriminals have found ways to capture credentials by inserting fake login boxes onto a web page that users cannot see. So, when you accept the option to autofill your username and password, you are also populating these fake boxes.  

Tips For Rethinking Your Online Habits 

Take a proactive approach to your digital protection the next time you are browsing the internet by reassessing your online habits. Check out these five tips to ensure you are staying as safe as possible online. 

1. Clear your cookies on your browser 

Cookie data can contain anything from login information to credit card numbers. Cybercriminals looking to exploit this information can hijack browser sessions to pose as legitimate users and steal cookies as they travel across networks and servers. As a result, it is essential for online users to regularly clear out their cookies to better protect their information from falling into the wrong hands. Navigate to your browser’s history, where you can wipe the data associated with each browser session, including your cookies.  

2. Use a reliable password manager 

Clearing your browser’s cookie data will also remove your saved logins, which is why leveraging a password manager can make it easier to access regularly visited online accounts.  

Many browsers come with a built-in password generator and manager; however, it is better to entrust your logins and password to a reputable password manager. Browser password managers are not as secure as password managers, because anyone who has access to your device will also access your online information. A password manager, such as True Key, provides a more secure solution since it requires you to log in with a separate master password. A password manager also works across various browsers and can generate stronger passwords than those created by your browser.  

3. Adjust browser privacy settings 

In addition to clearing cookie data, users should adjust their browser settings to ensure their online sessions remain private.  

Another option is to access the internet in Private Browsing Mode to automatically block third-party tracking, making it a quick and easy option to ensure private browsing. Users can also enable the “do not track” function of their browser to prevent third-party tracking by advertisers and websites. Additionally, you can adjust your browser settings to block pop-up ads and control site permissions, such as access to cameras and locations.  

4. Use an ad blocker 

Ad blockers suppress unwanted and potentially malicious ads to ensure a safer browsing experience. Ad blockers can also make it easier to view page layout by removing distracting ads and optimizing page load speed. Additionally, they prevent websites from tracking your information that third parties can sell. 

5. Leverage a reputable security solution  

Deploying a security solution like McAfee Total Protection ensures the safest internet browsing experience through a holistic approach for threat detection, protection, and remediation. Equipped with a password manager, antivirus software, and firewall protection, users can effectively sidestep online threats while browsing the internet. 

Take Action to Ensure Safe Browsing 

Your online behavior can say a lot about you so make sure you safeguard your internet protection. Whether it is through malvertising or invisible forms, hackers can glean information to paint a picture of who you are to target you through deceptive tactics. Cybercriminals are always looking for vulnerabilities which is why assessing your online habits sooner rather than later is a critical first step to smarter online browsing. 

Stay Updated 

To stay updated on all things McAfee and on top of the latest consumer and mobile security threats, follow @McAfee_Home on Twitter, subscribe to our newsletter, listen to our podcast Hackable?, and ‘Like’ us on Facebook. 

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