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TCP SACK Panic — Kernel vulnerabilities leading to remote denial of service

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Netflix employees discovered three vulnerabilities in the TCP network stack code. The most serious vulnerability allows a remote attacker to trigger a kernel panic. Several CVE identifiers were attached to these issues: CVE-2019-11477 is classified as a significant vulnerability, while CVE-2019-11478 and CVE-2019-11479 are deemed moderate. The first two vulnerabilities relate to SACK (Selective Acknowledgment) and MSS (Maximum […]

Flash will be disabled by default in Firefox 69.

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Mozilla developers have disabled the playback of Flash content by default in the nightly builds of Firefox. Starting with Firefox 69, scheduled for September 3, the settings for the Adobe Flash Player plugin will remove the option to enable Flash permanently, leaving only the ability to disable Flash and to individually enable it for specific sites (activation with an explicit click) without remembering the selected mode. In the ESR branches of Firefox […]

Release of the DragonFly BSD 5.6 operating system

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The release of DragonFlyBSD 5.6 is now available, an operating system with a hybrid kernel, created in 2003 for the alternative development of the FreeBSD 4.x branch. Key features of DragonFly BSD include the HAMMER distributed versioned filesystem, support for loading 'virtual' kernels as user processes, caching data and metadata from the filesystem on SSDs, context-aware variant symbolic links, and the ability to freeze processes […]

Vulnerabilities in the TCP stacks of Linux and FreeBSD leading to remote denial of service.

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Netflix has identified several critical vulnerabilities in the TCP stacks of Linux and FreeBSD that allow for remote initiation of kernel crashes or excessive resource consumption when processing specially crafted TCP packets (packet-of-death). The issues are caused by errors in the handlers for maximum segment size (MSS) in TCP packets and the selective acknowledgment (SACK) mechanism. CVE-2019-11477 (SACK Panic) […]

Why We Are Creating an Enterprise Service Mesh

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Service Mesh is a well-known architectural pattern for integrating microservices and transitioning to cloud infrastructure. Today, it's quite challenging to do without it in the cloud-container world. Several open-source implementations of service mesh are already available on the market, but their functionality, reliability, and security are often insufficient, especially when it comes to the requirements of large financial companies on a national scale. Therefore […]

Interactive Roadmap for Web Development Learners

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The codery.camp programming school continues to develop in the village. Recently, we completed a complete overhaul of the web development course, which is now available online as well. For structuring the theoretical materials, we applied an unusual solution – all of them are combined into an interactive graph that serves as a convenient roadmap for those studying web development. The materials are interlinked and, besides the theory itself, contain exercises on […]

At the beginning of next year, Phison will present an SSD controller with a speed of 6500 MB/s.

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Phison is working on a new controller designed for next-generation solid-state drives using the high-speed PCI Express 4.0 interface. A key feature of this innovation will be the support for higher data transfer speeds—up to 6500 MB/s. Earlier this year, Phison showcased its PS5016 controller, intended for next-generation solid-state drives with the capability of connecting through four […]

Reduce backups by 99.5% with hashget

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hashget is a free, open-source deduplicator — a utility similar to an archiver, designed to significantly reduce the size of backups, as well as organize incremental and differential backup schemes and more. This is a review article describing its capabilities. The use of hashget itself (which is quite straightforward) is detailed in the project's README and wiki documentation. Comparison By the genre's law, I will begin with intrigue — comparisons […]

Ubuntu will provide Chromium only as a snap package

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The developers of Ubuntu have announced their intention to stop supplying deb packages for the Chromium browser in favor of distributing self-contained images in the snap format. Starting with Chromium version 60, users have already been given the option to install Chromium from both the official repository and in the snap format. In Ubuntu 19.10, the supply of Chromium will be limited to the snap format only. For users of previous versions of Ubuntu […]

S.T.A.L.K.E.R. 2: decoding ciphers, development process, atmosphere, and other details

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The YouTube channel 'Antishnaps' has released two parts of an interview with developers from the studio GSC Game World. The creators shared details about the making of S.T.A.L.K.E.R. 2 and briefly discussed the project's concept. According to them, the early announcement was made to foster active communication with fans. Company representatives stated: 'The beginning of the creation of the second part of the franchise is a significant event, and there is no point in hiding it from the fans.' The developers […]

How to Get the Most Out of the Conference. A Guide for Beginners

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Conferences are not unusual or special for established professionals. But for those who are just trying to get on their feet, the hard-earned money spent must yield maximum results; otherwise, what was the point of living on instant noodles and staying in a dorm for three months? This article provides a solid overview of how to attend a conference. I suggest expanding a little […]

Free as in Freedom in English: Chapter 2. 2001: A Hacker Odyssey

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2001: A Hacker Odyssey Two blocks east of Washington Square Park stands the Warren Weaver building—brutal and imposing, like a fortress. This is home to the Computer Science Department at New York University. The industrial-style ventilation system creates a constant veil of hot air around the building, equally bewildering the bustling businesspeople and the wandering idlers. If a visitor manages to overcome this line of defense […]

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