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Log4Shell – World’s Leading Cybersecurity Agencies Warn of Vulnerability Threats

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Log4Shell - World's Leading Cybersecurity Agencies Warn of Vulnerability Threats

Leading Cybersecurity Agencies in Peace are a threat alert from the Log4Shell vulnerability and other related vulnerabilities. In a joint statement released this week, the Fives Eyes intelligence alliance indicates that Threat agents actively exploit an Apache vulnerability in the Log4j log library.

Five Eyes, made up of cybersecurity agencies from the US, UK, Australia, New Zealand and Canada, reports that “sophisticated cyberthreat actors are actively scanning networks to potentially exploit Log4Shell, CVE-2021-45046, and CVE-2021. -45105 on vulnerable systems. ” The best practices provide guidance for resolving an issue that has reached a critical vulnerability level of 10 out of 10 in the Common Vulnerability Scoring System (CVSS).

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Governments around the world are warning organizations of the risks posed by recent Log4j vulnerabilities, at least two of which – CVE-2021-44228 (also known as Log4Shell) and CVE-2021-45046 – have been used in attacks. Both cybercriminals and government-sponsored spy agents have targeted Log4j in their recent attacks. For now Belgian military they appear to be the only government agency to confirm that it was hit.

Cybersecurity and Infrastructure Agency US (CISA) issued an emergency directive obliging agencies to take immediate action to eliminate the risk. In addition to the mitigation guidance, this week CISA announced the release of scanner Log4j is an open source software designed to help organizations identify potentially vulnerable Internet services affected by recent vulnerabilities.

The Five Eyes release details the steps that vendors and organizations must take to mitigate the threats posed by Log4j vulnerabilities, including the latest Denial of Service (DoS) issue (CVE-2021-45105). The communiqué also provides guidance for organizations with systems control industrial (ICS) and other operating technology (OT) assets. However, agencies believe that information technology (IT) devices, especially those connected to the Internet, should take priority.

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Especially dangerous vulnerability

A high severity vulnerability known as Log4Shell was patched by the Apache open source community in early December. However, vulnerabilities of the same nature were exploited by cybercriminals to launch extortionist, illegal mining of devices and systems to obtain virtual currency, data theft and much more.

The Log4j library is present in a huge number of modern enterprises, both in third party applications and in home applications. Some of the most used software in the world such as Apple iCloud, Google, Twitter, Steam and Minecraft use this tool.

The vulnerability could, among other malicious activities, allow attackers to execute remote code to install malware on an infected computer and launch a series of attacks. According to security experts, threats are especially dangerous because even hackers with little experience they can learn them easily.

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Pixel 4 gets an update from Google ahead of time

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Android 13 Pixel 4 Google atualização beta

Android 13 is being developed at a good pace, Google periodically releases new test versions, as expected. This system is expected in late summer to update Google smartphones first.

Still without a planned and expected release date, now a contingency arose. Unexpectedly, a Pixel 4 user received an update to Android 13, even though it is a beta version.


Google has an open testing program that anyone who wants to try Android 13 can use. It's not limited to just pixels, but has opened it up to several models from other brands so that they can evaluate this version.

What the user of this Pixel 4 did not expect is that their smartphone will receive Android 13 version TP1A.220603.002.A1. Apparently, this is reserved for Google internal testing and should not have been available outside the company.

Even stranger and even more ridiculous is that this user did not register their Pixel 4 in any of the Android 13 tests. Thus, they were far from accessing this or any other version of the new Google system that was not even released. more. .

In the description he provided on various internet channels, the owner of this Pixel 4 said that he had problems with the smartphone from that moment on. The worst of them was even a clear incompatibility with the Play Store. Reinstalling the app and even resetting the Pixel 4 didn't fix the problem.

Even though this seems to be the only known case with Android 13, this is a seemingly normal situation. In previous years and in different versions, there were reports of situations where users of Pixel smartphones inadvertently received updates.

With Android 13 almost ready, Google is accelerating its pace of development. The final version should appear soon, thus paving the way for the expected update, both for the Pixel and for all other smartphones in the Google system.

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Blocks R21

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Blocks R21

Portuguese 3D printer startup Blocks will release a new model, the Blocks R21, which is due to hit the market in September. Fortunately, we were able to test the device already in its final version, which showed an impressive evolution compared to the previously tested model. One MKII.

This new printer features an all-aluminum construction, an LCD touch panel that allows you to control all printer settings. Among them is the calibration of the print tray, which, in addition to heating, has a metal coating with a texture that greatly contributes to the adhesion of the filament during printing.

Another important detail is the integration of all the main printing elements in one module, such as a two-block extruder and a hot end. The latter has a threaded screw for quick replacement, which allows you to replace the module with another one with a nozzle that is compatible with a particular type of filament. The variation can be from 0.2 to 1 mm – the hot end supplied with the printer is equipped with a 0.4 mm nozzle. This is to provide better print quality based on filament type, from traditional PLA to ABS, Flex, PETG, nylon, fiberglass, carbon fiber reinforced PET, PLA with metal or wood.

In terms of use, the Blocks R21 couldn’t be simpler and more intuitive thanks to the aforementioned LCD touch screen and a new tray that is easy to calibrate and requires a minimum amount of glue liquid (varnish). The fact that it uses an almost closed rigid construction, together with the integration of all units into a single module, made it feel quieter: it was even the quietest I have tested to date. Blocks R21 is priced to be considered “premium” and is available in a basic version, already with all the accessories you need to get started printing right away. However, we can buy it with an optional connection kit which, while pushing the price up to a less than pleasant €1,800, adds a Wi-Fi controller, webcam and temperature sensor so you can monitor print status remotely.

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Distributor: Blocks

Price: €1575


Data sheet

Print area: 210 x 300 x 250 mm
print speed: 60 mm/s
Connections: USB, SD card, WiFi
Compatibility: Windows, MacOS, Linux
Additionally: power cord, USB cable, USB stick, spatula, tweezers, calibration paper, adhesive spray,
Dimensions: 470 x 350 x 490 mm
Weight: 18 kg


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Learn about the extended RAM feature coming to mobile phones and tablets | Cell

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Learn about the extended RAM feature coming to mobile phones and tablets |  Cell

Virtual RAM, also known as RAM Plus – is a memory expansion feature that is increasingly used in cell phones from major manufacturers. brands like Samsung e xiaomi to make the feature available on some smartphones, such as Galaxy devices in the case of the South Korean one, and some models of the POCO, Redmi and Mi series, on the Chinese side. The function uses the free part of the cell’s memory to expand the RAM and thus improve the performance of the device. OUR Apple also recently announced such a feature for ipad.

The iPhone manufacturer revealed the functionality during the presentation of new items iPadOS 16 at the beginning of June. The operating system update will bring for those devices that are equipped with M1 or M2 processors, the replacement of virtual memory. According to Apple, the update will use ipad offer up to 16GB of storage to help run the heaviest apps like phones do android.

Samsung Galaxy A53 — Photo: Disclosure/Samsung

How virtual memory works

Virtual RAM is not native to devices and became available after a software update. That is, everything will depend on how up-to-date the user’s operating system is, and even so, this is a feature that is far from being released to everyone. The available size depends on the smartphone. when Samsungfor example, Galaxy A52S can be used additionally up to 4 GB, but Galaxy A53 you can use up to 8GB more via RAM Plus.

when Applewhich provides additional memory for iPad models only ipad 11″ Pro (3rd generation), ipad 12.9″ Pro (5th gen) and ipad Air 5th generation, equipped with the giant’s own processors, will be able to use this feature. OUR xiaomi more democratic, with more than 30 compatible devices, including Xiaomi Mi 11, Redmi Note 10 Pro 5G, Poco F3 and others.

Apple’s iPadOS 16 combines multiple overlapping windows into a single view – Photo: Handout/Apple

Benefits of using virtual RAM

Among the benefits of enabling virtual RAM is the ability to run multiple applications at the same time without crashing, as the system allocates storage according to the needs of the device – but, of course, within the limit set by the manufacturer. Heavier applications that require more from smartphones can be downloaded and used without delay.

RAM Plus can be accessed in the Samsung Android memory settings – Photo: Reproduction/Katarina Bandeira

Disadvantages of using virtual RAM

Despite the performance benefits, there are some limitations that the user must be aware of before enabling a significant amount of virtual RAM. First, even with the addition of RAM, the performance is not the same as the physical version. It is also not possible to disable this feature on devices that support this feature.

That is, if your phone has 128 GB of internal storage, at least 2 GB will be dedicated to the device’s virtual RAM, which will reduce the space to 126 GB. Also, using this feature to use a heavier application may result in performance degradation of other applications running in the background.

It is important to note that in order to use this function, the mobile phone must have free internal memory, that is, it cannot be occupied by files of any nature or systems. Otherwise, the function cannot be activated. on the site Samsung, the manufacturer itself warns of the limitation “RAM Plus is a technology that uses part of the smartphone’s internal memory as RAM. You must have free space on the internal memory, ”is written in small print on the manufacturer’s website.

Launch of Xiaomi, Mi 11 has sold over 1 million units. — Photo: Publicity/Xiaomi

How to find out the amount of virtual memory on your mobile

for instruments xiaomi, the path is almost the same: Settings > Advanced settings > Memory expansion and enable the function. On devices from both manufacturers, you must restart the cell phone after activating or selecting the amount of virtual RAM to use. When iPadOSYes Appledespite what has been announced, this feature will only be available when the new operating system becomes available for new devices, which should happen in the second half of the year.

with information from Samsung e Apple

Which one is better xiaomi? Take a look at the 3 most powerful cell phones in the video below.

What is better than Xiaomi? Meet the 3 most powerful mobile phones of 2022

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