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Log4Shell (CVE-2021-44228) is a zero-day vulnerability reported in November 2021 in Log4j, a popular Java logging framework, involving arbitrary code execution. [2] [3] The vulnerability had existed unnoticed since 2013 and was privately disclosed to the Apache Software Foundation, of which Log4j is a project, by Chen Zhaojun of Alibaba Cloud's security team on 24 November 2021.
What is Log4j and why is this massive security flaw so important? ... 2021 at 5:23 PM. ... Known as the Log4j vulnerability, the flaw impacts a piece of open-source logging software that allows ...
Log4Shell, which is the actual bug in Log4j, is what is known as a remote code execution (RCE) vulnerability, the worst kind of threat. In this particular case, the Log4Shell vulnerability is so ...
The feature causing the vulnerability could be disabled with a configuration setting, which had been removed [51] in Log4j version 2.15.0-rc1 (officially released on December 6, 2021, three days before the vulnerability was published), and replaced by various settings restricting remote lookups, thereby mitigating the vulnerability.
On December 9, 2021, an RCE vulnerability called "Log4Shell" was discovered in popular logging framework Log4j, affecting many services including iCloud, Minecraft: Java Edition and Steam, and characterized as "the single biggest, most critical vulnerability of the last decade".
To date, "exploitation of Log4j occurred at lower levels than many experts predicted, given the severity of the vulnerability," a report from the panel determined.
On December 8, Zhaojun contacted the developers again detailing how the vulnerability was being discussed in public security chat rooms, was already known by some security researchers, and pleaded that the team expedite the solution to the vulnerability in the official release version of Log4j. [201]
In a year that has experienced one jarring cyber attack after another — from ransomware disruptions to the U.S. gas supply and food industries to one of the largest crypto heists ever witnessed ...
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