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Malicious sites abuse 11-year-old Firefox bug that Mozilla failed to fix

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Malware authors, ad farmers, and scammers are abusing a Firefox bug to trap users on malicious sites.

This wouldn’t be a big deal, as the web is fraught with this kind of malicious sites, but these websites aren’t abusing some new never-before-seen trick, but a Firefox bug that Mozilla engineers appear to have failed to fix in the 11 years ever since it was first reported back in April 2007.

The bug narrows down to a malicious website embedding an iframe inside their source code. The iframe makes an HTTP authentication request on another domain. This results in the iframe showing an authentication modal on the malicious site, like the one below.

For the past few years, malware authors, ad farmers, and scammers have been abusing this bug to lure users on sites where they show all sorts of nasties, such as tech support scams, ad farms that reload the page with new ads in a loop, pages that push users to buy fake gift cards, or sites that offer malware-laced software updates.

Whenever users try to leave, the owners of these shady sites trigger the authentification modal in a loop. Every time the user dismisses it, another request is made, and a new modal appears, effectively keeping the user captive on the malicious sites until they close the browser altogether, and are forced to start a new browsing session.

But despite being reported over and over again for seven other times [1, 2, 3, 4, 5, 6, 7], this issue has gone unfixed, for unknown reasons, and crooks have gladly abused it all this time.

The latest example of abuse comes from a user who reported the issue once again today, after landing on one of these shady sites that tried to force him into installing a suspicious Firefox extension.

“At first, it is opened full screen mode. With some fake Windows dialog (I am using Linux so I know it is fake),” the user said. “It tried to [force] me install their extensions.”

“Then I press ESC to exit full screen. I click the close button of tab or window, but it doesn’t work because it has this login dialog. I click close button of the login dialog or cancel button. Then the dialog will appear again. I click the ‘Don’t allow’ button of extension installation pop over, but it seems not clickable. I killed the Firefox process, which is the only solution for me.”

firefox-bug-abused.png
Image: Guo Yunhe

Sure, Mozilla is an open source project, and it doesn’t have unlimited resources to handle all the reported issues, but you’d think that after more than 11 years a Firefox engineer would find the time to fix an actively exploited issue.

Based on the feedback left by other users on the reported issue, the Firefox team’s best bet is to follow how Edge and Chrome have dealt with this same issue.

Edge: The delay between authentication modals in Edge is large enough to allow the user to close the tab or the browser.

Chrome: The authentication dialog window has been moved from the browser window level to each tab’s level. This means the aggressive authentication dialogs only blocks the tab, and not the entire browsers, allowing the user to easily close the abusive tab.

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Adventist Risk Management Data Protection Infrastructure

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Companies always want to enhance their ability to quickly address pressing business needs. Toward that end, they look for new ways to make their IT infrastructures more efficient—and more cost effective. Today, those pressing needs often center around data protection and regulatory compliance, which was certainly the case for Adventist Risk Management. What they wanted was an end-to-end, best-in-class solution to meet their needs. After trying several others, they found the perfect combination with HYCU and Nutanix, which provided:

  • Ease of deployment
  • Outstanding ROI
  • Overall TCO improvement

Nutanix Cloud Platform provides a software-defined hyperconverged infrastructure, while HYCU offers purpose-built backup and recovery for Nutanix. Compared to the previous traditional infrastructure and data protection solutions in use at Adventist Risk Management, Nutanix and HYCU simplified processes, speeding day-to-day operations up to 75%. Now, migration and update activities typically scheduled for weekends can be performed during working hours and help to increase IT staff and management quality of life. HYCU further increased savings by providing faster and more frequent points of recovery as well as better DR Recovery Point Objective (RPO) and Recovery Time Objective (RTO) by increasing the ability to do daily backups from one to four per day.

Furthermore, the recent adoption of Nutanix Objects, which provides secure and performant S3 storage capabilities, enhanced the infrastructure by:

    • Improving overall performance for backups
    • Adding security against potential ransomware attacks
    • Replacing components difficult to manage and support

In the end, Nutanix and HYCU enabled their customer to save money, improve the existing environment, and, above all, meet regulatory compliance requirements without any struggle.

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Secure Insight: GigaOm Partners with the CISO Series

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Don’t look now, but GigaOm, the analyst firm that enables smart businesses to future-proof their decisions, is forging new partnerships to extend its reach and better inform busy IT decision makers. On Thursday, the company announced it was teaming with the CISO Series to share content and better support the community of chief information security officers, security practitioners, and security vendors.

“The CISO Series is one we have admired for a while because they have a very similar aim: They help security professionals become more knowledgeable and understand how their roles are changing,” said Ben Book, GigaOm founder and CEO. “We saw a clear common interest and are delighted to be working together.”

The CISO Series brand has built a formidable reputation through its podcasts, blogs, video chats, and live events for the security community. It has added the extremely popular CyberSecurity Headlines podcast to its stable this year, which joins the CISO/Security Vendor Relationship and Defense in Depth podcasts. Every Friday at 10am Pacific Time, the CISO Series hosts its highly engaging and fun weekly live CISO Series Video Chat, which viewers can register for here.

The channel partnership connects two of the strongest, fastest-growing brands in enterprise IT content production. The agreement enables the CISO Series to share exclusive GigaOm reports with its audience ahead of publication, while GigaOm is able to share insights from the CISO Series’ various publications through its social channels and newsletters. The CISO Series joins other media firms, such as The Register and SDXCentral, as official GigaOm Channel Partners.

“We are delighted to be working with GigaOm because we’re not only both addressing the same audience, but we’re also both trying to bring education and understanding to both the security vendor and practitioner communities,” said David Spark, managing editor and executive producer at the CISO Series. “GigaOm is providing some excellent reports that we’re leaning on for our discussions and reporting across all of our shows.”

Spark continued: “We are always tweaking our programming to bring the best and most up-to-date resources and we’re really impressed with both the volume and quality GigaOm is delivering. Not only are we impressed with their editorial work, but we also appreciate their business branding. It’s something we felt comfortable about aligning with the CISO Series brand as well.”

Check out the CISO Series schedule at http://crowdcast.io/cisoseries, or visit cisoseries.com for more information about the CISO Series and its weekly Video Chats.

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Key Criteria for Evaluating Vulnerability Management Tools

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Vulnerability management tools scan your IT estate to help identify and mitigate security risks and weaknesses. These tools can facilitate the development of a more comprehensive vulnerability management program. Leveraging people, processes, and technologies, successful initiatives effectively identify, classify, prioritize, and remediate security threats.

A security vulnerability is a weakness that can compromise the confidentiality, integrity, and availability (CIA) of information. Attackers are constantly looking to exploit defects in software code or insecure configurations. Vulnerabilities can exist anywhere in the software stack, from web applications and databases to infrastructure components such as load balancers, firewalls, machine and container images, operating systems, and libraries. This includes code used in the CI/CD pipeline as well as the infrastructure-as-code (IAC) that defines the compute, network, and storage infrastructure.

Recent cybersecurity events have exposed widespread vulnerabilities involving the exploitation of zero-day malware and unknown weaknesses. Threat actors continually discover new exploitation tactics, techniques, and procedures (TTPs) to take advantage of weaknesses throughout integrated systems. Moreover, identifying breach paths is increasingly complicated due to the widespread adoption of ephemeral services.

Vulnerability management solutions should provide end-to-end visibility of the protect-surface by aggregating both platform and application risks in a single pane of glass, while leveraging prioritized remediation based on business risk and threat context for efficiency. Containerized workloads deployed via DevOps pipelines have unique security requirements that demand a fully integrated vulnerability assessment to be automated into cloud platform services running containerized workloads.

The path to a mature security posture starts with the ability to identify vulnerabilities in software code, third-party libraries, and at runtime. In addition, the cloud platform used to host your applications should be scanned for misconfigurations. This requires the use of policy configuration baselines, benchmarks, and compliance standards that apply to both the infrastructure and the code used to build it. As organizations implement security guardrails early in the software development lifecycle (SDLC), they can take advantage of cloud-native culture to ensure network and security tools are used throughout all phases of the SDLC.

This GigaOm report explores the key criteria and emerging technologies that IT decision makers should evaluate when choosing a vulnerability management solution. The key criteria report, together with the GigaOm radar report that evaluates relevant products, provides a framework to help organizations assess the solutions currently available on the market and how these tools fit with their requirements.

How to Read this Report

This GigaOm report is one of a series of documents that helps IT organizations assess competing solutions in the context of well-defined features and criteria. For a fuller understanding consider reviewing the following reports:
Key Criteria report: A detailed market sector analysis that assesses the impact that key product features and criteria have on top-line solution characteristics—such as scalability, performance, and TCO—that drive purchase decisions.

GigaOm Radar report: A forward-looking analysis that plots the relative value and progression of vendor solutions along multiple axes based on strategy and execution. The Radar report includes a breakdown of each vendor’s offering in the sector.

Vendor Profile: An in-depth vendor analysis that builds on the framework developed in the Key Criteria and Radar reports to assess a company’s engagement within a technology sector. This analysis includes forward-looking guidance around both strategy and product.

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