Does SLF4J-log4j12 use Log4j?
The Log4j 2 SLF4J Binding allows applications coded to the SLF4J API to use Log4j 2 as the implementation. Note that the “12” in slf4j-log4j12 indicates that this is for Log4j 1.2, not Log4j 2. If you want to hook it to Log4j 2, then use org. apache.
Is Log4j over SLF4J affected?
As such, using log4j 2. x, even via SLF4J does not mitigate the vulnerability. However, as mentioned already, log4j 1. x is safe with respect to CVE-2021-44228.
Which is better SLF4J or Log4j?
Unlike log4j, SLF4J (Simple Logging Facade for Java) is not an implementation of logging framework, it is an abstraction for all those logging frameworks in Java similar to log4J. Therefore, you cannot compare both. However, it is always difficult to prefer one between the two.
Is SLF4J-log4j12 affected by Log4j vulnerability?
No. Using Log4j 2. x via the SLF4J Application Programming Interface does not mitigate the vulnerability.
What version of Log4j does SLF4J log4j12 use?
log4j version 1.2
The SLF4J distribution ships with several jar files referred to as “SLF4J bindings”, with each binding corresponding to a supported framework. Binding/provider for log4j version 1.2, a widely used logging framework.
What is SLF4J log4j12 used for?
SLF4J ship with a module called 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. jar, as described below.
Which version of Log4j is used in Log4j over SLF4J?
It will route the Log4j API calls to SLF4J to the binding you choose. You need to remove the Log4j library from your classpath and replace it with this dependency. Use this if you want to use the Log4j 1.2 binding for SLF4J.
Can we use Log4j without SLF4J?
You can get the exact same behavior by using the Log4j 2 API. It will give you exactly the same implementation freedom as SLF4J with a richer API. If my library use Log4j 2 API, and the application uses logback like spring-boot, what will happen with logger.info inside of my library?
Which versions of log4j are vulnerable?
What happened to log4j recently?
| Name | Vulnerability type | Affected log4j versions |
|---|---|---|
| CVE-2021-45046 | Denial of Service (DoS) and RCE | 2.0 through 2.15.0 |
| CVE-2021-4104 | RCE | 1.2* |
| CVE-2021-45105 | Denial of Service (DoS) | 2.0-beta9 to 2.16.0 |
| CVE-2021-44832 | RCE | 2.0 to 2.17.0 |
What is the use of SLF4J log4j12?
Simple Logging Facade for Java (abbreviated SLF4J) acts as a facade for different logging frameworks (e.g., java. util. logging, logback, Log4j). It offers a generic API, making the logging independent of the actual implementation.
Can we use SLF4J without Log4j?
OK, you have a default binding to Java Util Logging (JDK) what is probably not what you want. You should exclude that transitive dependency (do you know how?). If no binding is provided slf4j-api will default to a no-operation implementation discarding all log requests.
Does Lombok SLF4J use Log4j?
Using Log4j2 Logging with Lombok Now you can use either @Slf4j (recommneded) or @Log4j2 at class to use log4j2 as underlying logging implementation.
What is the use of slf4j log4j12?
What is the use of Log4j over slf4j?
log4j-over-slf4j. SLF4J ship with a module called 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.
What is the use of Log4j over SLF4J?
How bad is the Log4j vulnerability?
Log4j is used worldwide across software applications and online services, and the vulnerability requires very little expertise to exploit. This makes Log4shell potentially the most severe computer vulnerability in years.
What is the difference between SLF4J vs Log4j?
Below are the top 5 differences between Slf4j vs Log4j Let us discuss some of the major differences between Slf4j vs Log4j: 1. Ssl4j is just an abstraction or it provides an abstraction layer and we are not using it whereas Log4j is a logging framework that has different implementations.
How to route Log4j API calls to SLF4J?
It will route the Log4j API calls to SLF4J to the binding you choose. You need to remove the Log4j library from your classpath and replace it with this dependency. Use this if you want to use the Log4j 1.2 binding for SLF4J.
What does what is Log4j?
What is log4j? log4j is a reliable, fast and flexible logging framework (APIs) written in Java, which is distributed under the Apache Software License. log4j is highly configurable through external configuration files at runtime.
What is the latest version of SLF4J?
The Slf4j is compatible with all its previous versions. A user can easily migrate from slf4j to any version without any issue. There are several hindrances as one has to look after for the migration, talking of the Log4j2 the backward compatibility is not possible. Version 2.0.8 is the latest edition.