What is Apache log4j Extras?

Apache Extras™ for Apache log4j™ is a jar file full of additional functionality for log4j 1.2. x. Apache Extras for Apache log4j is a product of the Apache Logging Services Project, a project of The Apache Software Foundation. The package will use the log4j it requires + optional bugfix version after version 1.2.

What is the latest version of log4j?

Log4j 2.17. 1 is the latest release of Log4j.

What is Apache log4j used for?

Apache Log4j is a Java-based logging utility. Log4j Java library’s role is to log information that helps applications run smoothly, determine what’s happening, and help with the debugging process when errors occur. Logging libraries typically write down messages to the log file or a database.

What is RollingFileAppender in log4j?

Java Logging. Log4j2 RollingFileAppender is an OutputStreamAppender that writes log messages to files, following a configured triggering policy about when a rollover (backup) should occur. It also has a configured rollover strategy about how to rollover the file.

What is log4j over slf4j?

log4j-over-slf4j. It allows log4j users to migrate existing applications to SLF4J without changing a single line of code but simply by replacing the log4j. jar file with log4j-over-slf4j.

Does Apache httpd use Log4j?

Apache httpd does NOT use Apache log4j. Apache httpd is NOT subject to CVE-2021-44228.

Does Apache Web server use Log4j?

Log4j is a popular open-source Java logging library which sits under many applications and is incorporated into Apache web servers, such as ApacheStruts2, Apache Solr, Apache Druid and Apache Flink. It uses the Java Naming and Directory Interface (“JNDI”) and supports Lightweight Directory Access Protocol (LDAP).

Is Log4j patched?

Log4j is patched, but the exploits are just getting started.

What is impacted by Log4j?

The log4j security vulnerability allows attackers to execute malicious code remotely on a target computer. Meaning, bad actors (hackers) can easily steal data, install malware, or simply take control of a system via the Internet.

Is log4js vulnerable?

Log4Shell, an internet vulnerability that affects millions of computers, involves an obscure but nearly ubiquitous piece of software, Log4j. There have already been hundreds of thousands, perhaps millions, of attempts to exploit the vulnerability.

What is MaxBackupIndex in log4j?

The MaxBackupIndex option determines how many backup files are kept before the oldest is erased. This option takes a positive integer value. If set to zero, then there will be no backup files and the log file will be truncated when it reaches MaxFileSize .