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Crowdstrike’s Adam Meyers said the vulnerability has been “fully weaponized” and tools were readily available to exploit it.
It’s unclear how many apps are affected by the bug, but the use of log4j is extremely widespread. It’s not clear if Apple’s iCloud was among the targeted systems. Check Point estimates that some 850,000 attacks were attempted within just 72 hours of the initial outbreak.
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Similar methods of exploitation can be used to hack into any app running the free software. According to security researchers, a hacker merely had to do was paste a seemingly innocuous message into the chat box to compromise Minecraft’s servers. The vulnerability was exploited in Minecraft before Microsoft patched it over the weekend. The exploit doesn’t appear to have affected macOS. The site reports that researchers were able to demonstrate the vulnerability when connecting to iCloud through the web on December 9 and December 10, the same vulnerability no longer worked on December 11. Countless apps and services were said to be vulnerable by the exploit, known as Log4Shell, including iCloud, Minecraft, and countless others.Īccording to the Eclectic Light Company, Apple has patched the iCloud hole.
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The Apache Software Foundation, which runs the project, rated it a 10 on its risk scale due to the ease of which it could be exploited and the widespread nature of the tool CEO of cybersecurity firm Tenable Amit Yoran called it “the single biggest, most critical vulnerability of the last decade.Late last week, cybersecurity firm LunaSec uncovered a critical vulnerability in the open-source Log4j library that could give hackers the ability to run malicious code on remote servers. “The internet’s on fire right now,” he added shortly after the exploit was made public. The vulnerability was exploited in Minecraft before Microsoft patched it over the weekend Ĭrowdstrike’s Adam Meyers said the vulnerability has been “fully weaponized” and tools were readily available to exploit it.
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ICloud was one of the services vulnerable to the exploit, and Macworld notes that Apple, Microsoft, and others have been quick to patch it.Īccording to the Eclectic Light Company, Apple has patched the iCloud hole. Apple patches Log4Shell iCloud vulnerability Since applications routinely log a wide range of events - such as messages sent and received by users, or the details of system errors - the vulnerability is unusually easy to exploit and can be triggered in a variety of ways. To exploit the vulnerability, an attacker has to cause the application to save a special string of characters in the log. When exploited, the vulnerability lets hackers run malicious code on vulnerable servers, and it can reportedly affect platforms such as iCloud and Steam.Īs detailed by security company LunaSec (via the Verge), the vulnerability was first found in log4j, an open-source library used by multiple apps and websites for logging – which is the process of keeping a list of performed activities in order to review them later for fixing bugs or other errors.Īccording to security researcher Marcus Hutchins, Log4Shell could affect millions of apps around the world as the log4j library is widely used by developers.Īdding to the danger posed by widespread use of Log4j, it’s extremely easy for an attacker to use the Log4Shell exploit. A security hole discovered in this could be exploited in literally millions of apps.Ī new exploit called “Log4Shell” has been giving security teams at large technology companies a headache. Log4j is an open-source logging tool very widely used by both websites and apps. Apple has patched the Log4Shell iCloud vulnerability, after it was last week revealed that a security hole in the open-source tool log4j put millions of apps at risk.Ĭybersecurity experts described the vulnerability as “setting the internet on fire,” and “the most critical security vulnerability in a decade” …