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- The Log4j vulnerability, also known as Log4Shell, is a critical flaw in the Apache Log4j logging library. It allows attackers to remotely control and execute code on vulnerable machines, granting them total control. The vulnerability is caused by Log4j2 executing variable data from LDAP and JNDI without proper verification, making it exploitable by crafting a malicious request12345.Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.The Log4j vulnerability, also known as Log4Shell, is a critical vulnerability discovered in the Apache Log4j logging library in November 2021. Log4Shell essentially grants hackers total control of devices running unpatched versions of Log4j. Malicious actors can use the Log4j flaw to run almost any code they want on vulnerable systems.www.ibm.com/topics/log4jThe Log4j vulnerability – otherwise known as CVE-2021-44228 or Log4Shell – is trivial to exploit, leading to system and network compromise. If left unfixed malicious cyber actors can gain control of vulnerable systems; steal personal data, passwords and files; and install backdoors for future access, cryptocurrency mining tools and ransomware.www.cyber.gov.au/about-us/advisories/2021-007-lo…Put simply, the Log4j vulnerability allows attackers to remotely control and execute code on vulnerable machines. As Marcus Hutchins, noted security researcher, explains ‘millions of applications use Log4j for logging, and all the attacker needs to do is get the app to log a special string’.www.1e.com/blogs/log4j-log4shell-vulnerability-exp…The vulnerability is caused by the Log4j2 library receiving variable data from LDAP and JNDI and executing it without verifying. As a result, a potential threat was exploitable by crafting a malicious request to send the payload. LDAP and JNDI can be used together by Java programs to locate Java objects containing data that are needed.www.netsecurity.com/log4j-cve-2021-44228-vulner…The vulnerability leverages JNDI,9 which provides an abstract interface for different name resolution and directory services, such as DNS or LDAP.10 Log4j2 insufficiently sanitizes user-supplied data, potentially allowing an attacker to provide a string that is interpreted as a variable that, when expanded, results in the loading and invocation of a remote Java class file.www.crowdstrike.com/blog/log4j2-vulnerability-anal…
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