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Security Flaw and Solution



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A vulnerability (CVE-2021-44228) in Apache Log4j2 was disclosed on GitHub on December 9, 2021. Without authentication, this weakness allows remote code execution. Attackers are already using this hole in the Log4j2 open source logging library, used in millions of applications globally, to access internet-based corporate systems.

This Log4j2 vulnerability affects enterprises worldwide and might have catastrophic implications. How to secure your company? Explore.

What is Log4J?

Java has Log4j logging. Development and security professionals log items in programs to do the correct thing. This helps security analysts and engineers discover abnormalities in logs. Suppose you’re designing an app and want to do the right thing, but don’t want to write log code. Log4j is helpful here. As a free open-source framework, you may rapidly add it to your project and save time.

Millions of third-party enterprise apps, cloud providers, and manufacturers use Log4j. Mars, actually. Mars 2020’s Ingenuity drone logs data with Log4j.

This library’s flaw enables the Log4Shell vulnerability. This allows an attacker to send a message to a weak application and run malicious code.

This is excellent because the vulnerability is widespread, difficult to identify, and easy to exploit. An attacker just needs to produce a malicious file, upload it to a server they control, and modify a logging field.

After logging this string, Log4j will fetch and run the attacker’s malicious code. An attacker can then take control of the application and go to another portion of the organization’s network.

Does this mean every Log4j-using software is vulnerable?

Never! Your application must record the field where an attacker may edit text. Imagine: Imagine you have a Java program that accepts account logins. Do you want to record failed logins? Probably! But that’s also a field an attacker may exploit to submit modified code.

3 steps internal teams should take to test Log4J vulnerabilities

Assess systems and determine the location of Log4J

Any company should review its systems to see where Log4j is used. It’s harder than it seems. Any Java-using program on your network can have an extension, including third-party and open-source apps. It’s time-consuming to detect if a library contains the vulnerable Log4J version. Java’s universality helps explain its popularity. This isn’t limited to Windows domains or one industry.

Perform a vulnerability scan

These can be found in many ways. In a perfect world, we’d all have software inventory tools that list every piece of software and its dependencies used by the company. Start with vulnerability scans. Endpoint tools like Tanium or Osquery help find and fix problems. Scripting is also helpful.

Apply the Log4J patch

When a security or development team detects and verifies Log4j use, they’ll patch as quickly as possible. In some cases, the manufacturer may remedy it. Businesses can use backup or alternative software if the manufacturer hasn’t patched their program. If not, improve network monitoring and detection.

Is the Apache patch enough?

It takes more effort to patch Log4j than to just run a patch once over your network. Because Log4j is an open-source logging plugin used by thousands, if not millions, of apps, it will take some time for businesses to even determine which applications on their network use it.

“Everyone should assume compromise”

If any of your applications use Java, your environment is probably vulnerable. It is more crucial than ever to keep an eye on network activity to spot any unexpected network behavior.

Second and third vulnerabilities to consider

Since the initial vulnerability was discovered, a second and a third security concern have been discovered. These additional weaknesses may lead to DDoS assaults on a network.

By releasing updated versions with remedies, Apache is making an attempt to remain on top of the freshly discovered vulnerabilities. Businesses should prepare for new releases in the near future even if the most recent version, Log4j 2.17.0, has just been made available.

Check for updates from Apache and, when patching, update to the most recent version.

Home networks are also a source of concern, even while it makes sense that major enterprises are presently focusing all of their time and resources on patching and remediating the most important systems. Think about your amazing IoT smart home devices, like your home routers, which aren’t patched or updated as frequently. Everyone must consider some of the ancillary consequences while considering how this may affect them.


We believe that the community will be discussing the Log4j issue for a time as hackers develop new exploits to take advantage of it. Businesses must invest heavily in security analytics and event response if they want to be secure.

With the release of more information, this vulnerability will grow. Whatever form it takes, we want to make sure you are prepared for it.

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General Zone

Apple MacBook “Core M7″ 1.3 12” 2016 Specs



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About this Mac

3. Apple conducted performance evaluations on 12-inch MacBooks in March of 2017, using machines that had 1.3GHz Intel Core i5 processors, 512GB SSDs, and 8GB RAM. Apple computers were used for the tests throughout the process. It is necessary to wirelessly browse 25 popular websites while having the brightness set to 75% in order to get an accurate estimate of how long a battery will last. Run a movie through iTunes with the brightness set to 75% in order to obtain an accurate reading of the remaining battery life. The standby test is used to determine how long a device’s battery will last by putting the device into standby mode while it is simultaneously signed into iCloud, wirelessly connected, and running Safari and Mail while leaving all other settings in their default configurations. This test is performed in order to determine how long a device’s battery will last. The longevity of the battery can be affected by the way in which it is configured as well as the way in which it is used.


PCIe flash storage with soldering, either 256 or 512 gigabytes, is included in the package (cannot be upgraded). It takes the hard drive between 845 and 947 megabytes to store one second’s worth of data.

Screen Size and Resolution

This MacBook’s 12-inch “Retina” display has a resolution of 2304 by 1440 pixels, is backlit by TFT LED, and has a pixel density of 226 pixels per inch (PPI). All of these specifications are courtesy of Apple. As a direct consequence of this, it is able to display any one of millions of distinct colors. As a direct result of this, the differences between individual pixels are less noticeable when viewed from the typical viewing distance. [Citation needed] Images can be displayed with resolutions of up to 1024 by 640 pixels, 1280 by 800 pixels, and 1440 by 900 pixels, respectively, thanks to a technology called in-plane switching (IPS).

Processor& Graphics Processing Unit (GPU)

This computer came with macOS X 10.11.4 pre-installed on it when it was purchased (15E2066). After the release of the model in the early part of 2015, the HD Graphics 5300 was discontinued and replaced by the Intel Integrated HD Graphics 515. This processor is connected to a shared SDRAM memory space that has a bandwidth of 1866 megahertz LPDDR3.

Memory & Architecture

Memory on the device has been increased to 8 gigabytes of LPDDR3 SDRAM operating at 1866 megahertz, up from 8 gigabytes operating at 1600 megahertz when it was first made available to the public at the beginning of 2015. (unable to upgrade). Memory is organized in 64-bit chunks on this machine.

Introduced: April 19, 2016Discontinued: June 5, 2017
Screen Size and ResolutionMemory
Screen Size12 inchesLevel 1 Cache32k/32k x2
Resolution 2304×1440Level 2/Level 3 Cache256k x2, 4MB on chip
Processors1 (2 Cores)Min. RAM Speed1866 MHz
Architecture64-BitStandard RAM8 GB
Speed1.3 GHzMaximum RAM8 GB
TypeCore m7(M7-6Y75)RAM Slots2
Processor UpgradeSolderedMotherboard RAM8GB
System Bus SpeedOPIVideo CardHD Graphics 515
Cache Bus Speed1.1 GHz (Built-in)VRAM TypeIntegrated
ROM/FirmwareEFIStandard VRAM1.5 GB
EFI Architecture64-BitMaximum VRAM1.5 GB
StorageInclusive Features and Ports
Standard Storage256 GB SSDStandard Optical DriveNone
Storage Speed845 – 947 MB/sStandard Ethernet10/100/1000Base-T
Storage DimensionsSolderedStandard ModemNone
Storage InterfaceOnboard (PCIe 3.0 x 2)Standard AirPort802.11ac
BatteryStandard Bluetooth4.0
Type41.4 W h Li-PolyUSB Port (C)1
Battery Life10 – 11 hoursFireWire 400None
Case TypeNotebookInclusive InputTrackpad (Force Touch)
Form FactorMacBook Retina 12”S-Video OutputNone
Apple Order NoBTO/CTOMicrophone1
Apple SubfamilyEarly 2016Headphone1
Apple Model NumberA1534 (EMC 2991)Sound Out1
Model IDMacBook 9.1Power Adapter1

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