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  2. Examples of Log4j vulnerabilities include12345:
    • In older versions of Minecraft Java Edition, a user can type a JNDI lookup into the public chat window, allowing hackers to run malicious code remotely.
    • Log4Shell (CVE-2021-44228) is a remote code execution (RCE) zero-day vulnerability found in Log4j versions 2.14.1 and earlier.
    • Vulnerable systems written in Java and using Log4j can be exploited.
    • Attackers can perform HTTP requests that generate logs using Log4j 2, leveraging JNDI to perform requests to attacker-controlled sites.
    Learn more:
    For example, in older versions of Minecraft Java Edition, which use Log4J to record user messages, a user can type the JNDI lookup into the public chat window. Hackers can use this JNDI functionality to run malicious, arbitrary code remotely.
    Some versions of Log4j—specifically, Log4j 2.17.0 and below—suffer from serious vulnerabilities. The most dangerous of these is Log4Shell (CVE-2021-44228; CVSS rating: 10), a remote code execution (RCE) zero-day vulnerability found in Log4j versions 2.14.1 and earlier.
    www.ibm.com/think/topics/log4j-vulnerability-detect…
    For example, it’s not hard to imagine a package handling system that scans QR codes on boxes, or a contactless door key both being vulnerable if they are written in Java and use Log4j.
    blog.cloudflare.com/inside-the-log4j2-vulnerability-c…
    The following example — where logger is an instantiated Log4j2 logger — demonstrates the method by which this condition can be triggered by logging specially crafted, attacker-supplied data as an error message. To compromise the target, the JNDI/LDAP URL serves a malicious Java class object that will be deserialized and invoked on the victim host.
    www.crowdstrike.com/blog/log4j2-vulnerability-anal…
    An example pattern of attack would appear in a web request log with strings like the following: An attacker performs an HTTP request against a target system, which generates a log using Log4j 2 that leverages JNDI to perform a request to the attacker-controlled site.
    www.microsoft.com/en-us/security/blog/2021/12/11/…
     
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    WEBJun 20, 2024 · The Log4j vulnerability, also called Log4Shell, is a software vulnerability found in the Apache Log4j logging framework. It is a zero-day, remote code execution (RCE) vulnerability that allows attackers to run …

     
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  9. Apache log4j Vulnerability CVE-2021-44228: Analysis …

    WEBDec 10, 2021 · On Dec. 28, we updated this blog to include information about CVE-2021-44832, which is an RCE vulnerability affecting instances of Log4j 2 in instances where an attacker has permission to modify the …

  10. Log4Shell Zero-Day Vulnerability - CVE-2021-44228

    WEBOn Thursday, Dec 9th 2021, a researcher from the Alibaba Cloud Security Team dropped a zero-day remote code execution exploit on Twitter, targeting the extremely popular log4j logging framework for Java …

  11. Log4j2 Vulnerability: How to Mitigate CVE-2021-44228 …

    WEBDec 10, 2021 · CrowdStrike Falcon® OverWatch analyzes CVE-2021-44228 (Log4Shell) and the ongoing attempts to exploit the Log4j2 vulnerability, and offers mitigation recommendations.

  12. Log4j2 Vulnerability "Log4Shell" (CVE-2021-44228)

    WEBThis vulnerability is being widely exploited in the wild and it is highly advisable to assess the use and impact of log4j and patch as soon as possible. Information surrounding the vulnerability, impacted products …

  13. Log4Shell - Wikipedia

  14. Log4Shell: The Log4j Vulnerability Emergency Clearly …

    WEBSep 16, 2024 · The original Apache Log4j vulnerability (CVE-2021-44228), also known as Log4Shell, is a cybersecurity vulnerability on the Apache Log4j 2 Java library. This security flaw is a Remote Code Execution …

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