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Property lookup support for values defined in the configuration file, system properties, environment variables, the ThreadContext Map, and data present in the event; Support for multiple APIs: Log4j 2 can be used with applications using the Log4j 2, Log4j 1.2, SLF4J, Commons Logging and java.util.logging (JUL) APIs. Custom log levels
Log4j 2 provides both an API and an implementation. The API can be routed to other logging implementations equivalent to how SLF4J works. Unlike SLF4J, the Log4j 2 API logs Message [2] objects instead of Strings for extra flexibility and also supports Java Lambda expressions. [3] JCL isn't really a logging framework, but a wrapper for one.
The Log4j flaw can be used to do everything from attacking corporate email systems to impacting real-world infrastructure. (Image: Getty) (Petri Oeschger via Getty Images)
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.
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A spokesperson for Darktrace pointed Fortune to the announcement the company made about the conclusion of the Ernst & Young review, and the RNS updates at the time of the short-seller attack, and ...
Darktrace Ltd. is a British-American [5] cyber security company, established in 2013 and headquartered in Cambridge, England and San Francisco,United States [2] [5] It was listed on the London Stock Exchange until it was acquired by Thoma Bravo in October 2024.
Simple Logging Facade for Java (SLF4J) provides a Java logging API by means of a simple facade pattern.The underlying logging backend is determined at runtime by adding the desired binding to the classpath and may be the standard Sun Java logging package java.util.logging, [2] Log4j, Reload4j, Logback [3] or tinylog.