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Are we affected by this 0-day Log4j vulnerability ?


leonrak
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https://blog.cloudflare.com/cve-2021-44228-log4j-rce-0-day-mitigation/

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Who is affected

Log4j is a powerful Java based logging library maintained by the Apache Software Foundation.

In all Log4j versions >= 2.0-beta9 and <= 2.14.1 JNDI features used in configuration, log messages, and parameters can be exploited by an attacker to perform remote code execution. Specifically, an attacker who can control log messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled.

 

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