log4shell-tools
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log4shell-tools | Logback | |
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8 | 20 | |
84 | 2,893 | |
- | 0.7% | |
4.5 | 8.7 | |
22 days ago | 6 days ago | |
Go | Java | |
MIT License | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
log4shell-tools
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Log4j: The Pain Just Keeps Going and Going
I'm seeing this as well. While the amount of traffic has certainly decreased compared to the first couple of days after the CVE was announced, https://log4shell.tools is still being used by people every day.
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How to send similar payload to different http headers?
e.g. from log4j. Taken from https://log4shell.tools/
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Received a visit from the infamous Dejmnok420 today. Can anyone ELI5 the steps to take now?
I run tests with https://log4shell.tools, and it seems I'm vulnerable on client side, but my server is safe, which makes sense as I compiled the .jar 2 weeks ago with BuildTools as indicated here https://www.spigotmc.org/threads/spigot-security-releases-%E2%80%94-1-8-8%E2%80%931-18.537204/
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Log4Shell Vulnerability Test Tool
You're right, but this has always been the trade off with tools like this. You put some trust in the tool's authors and gain some insight in return. Remember the services that tested for Heartbleed (e.g. https://filippo.io/Heartbleed/)? Fairly similar trade-off, but still these tools were widely used.
If you really don't trust me and have some technical know-how, you can self host the service. It's open source: https://github.com/alexbakker/log4shell-tools.
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Log4j 2.15.0 – Previously suggested mitigations may not be enough
I can't say I'm feeling the same. Still lots of people testing over at https://log4shell.tools almost a week after this vulnerability became widely known. Plenty of people still discovering they're vulnerable as well. I think it's likely that these are just the people who know they're using log4j. If you're running a black box product from a vendor you'll have no clue you're vulnerable until it's too late.
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Analysis of the 2nd Log4j CVE published earlier (CVE-2021-45046 / Log4Shell2)
I have a feeling this vulnerability is going to be with us for years. Shameless plug: I built a tool that assists in detecting whether you're vulnerable to this or the previous CVE: https://log4shell.tools. Just enter the JNDI URI it gives you anywhere you suspect it ends up causing a message lookup in log4j. If log4j does so much as a DNS lookup, this tool will tell you about it.
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log4shell.tools - Check if you're vulnerable to an egregious case of log4shell
Done! https://github.com/alexbakker/log4shell-tools
Logback
- JHipster 8 - Analisando o código da nossa primeira aplicação monolítica - Parte 1/3
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Logging in your API
Java -> Logback, Log4j2, JDK (Java Util Logging), Slf4j, e.t.c.
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Spring Boot logging with Loki, Promtail, and Grafana (Loki stack)
This is a GitHub link to my demo app. It’s simple Spring Boot web app used to debugging various stuff. There are many ways to configure JSON logging in Spring Boot. I decided to use Logback because it is easy to configure and one of the most widely used logging library in the Java Community. To enable JSON logging we need to add below dependencies.
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5 Best Logging Solutions for Java
Logback(https://logback.qos.ch/) is another non-commercial Java logging framework. It labels itself as a successor to the previously discussed Log4j framework.
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Log4j: The Pain Just Keeps Going and Going
> Then apache decides to put new people on log4j, do a backward incompatible v2 design that nevertheless is worse than slf4j. Why?
slf4j itself isn't a logging framework. It's a facade to logging frameworks.
Simple Logging Facade for Java ( https://www.slf4j.org )
It needs a logging framework behind it - log4j, log4j2, logback, commons, JUL.
The question is "why do log4j2?"
Logback went from the log4j1.x path ( https://logback.qos.ch )
Log4j2 has a lot of features that weren't present when the project started ( https://en.wikipedia.org/wiki/Log4j#Apache_Log4j_2 ).
There is a licensing difference between Logback (LGPL) and Log4jx (Apache Commons).
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E2E-Testing in CI Environment With Testcontainers
Also, I'd like you to pay attention to the log consumer. You see, when the E2E scenario fails, it's not always obvious why. Sometimes to understand the source of the problem you have to dig into containers' logs. Thankfully the log consumer allows us to forward a container's logs to any SLF4J logger instance. In this project, containers' logs are forwarded to regular text files (you can find the Logback configuration in the repository). Though it's much better to transfer logs to external logging facility (e.g. Kibana).
- 🛡️ This is how we maintain & release Secured Software on Github 🤖
- Creating an interface
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How to Check if a Java Project Depends on A Vulnerable Version of Log4j
This shows that the MariaDB JDBC driver uses Logback as a logging framework. Although Logback is not affected by Log4Shell, it has a related vulnerability (of much lesser severity, no need to panic) fixed in version 1.2.8 and 1.3.0-alpha11. I checked the version used by the connector and found that it used 1.3.0-alpha10. Even though Logback is included as a test dependency in the MariaDB driver, I sent a pull request on GitHub to update it. I encourage you to do the same in any open-source project you find and that includes a vulnerable dependency.
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Migrating off of Log4j 2.x
Dependencing on the project, changing the logger might range from easy peasy to a multi-week task. I'm ready to bet that in many (most?) cases, it'd actually be quite easy, so let's explore how to do it, using Logback as the target (there aren't that many alternatives actually).
What are some alternatives?
ysoserial - A proof-of-concept tool for generating payloads that exploit unsafe Java object deserialization.
Apache Log4j 2 - Apache Log4j 2 is a versatile, feature-rich, efficient logging API and backend for Java.
lunasec - LunaSec - Dependency Security Scanner that automatically notifies you about vulnerabilities like Log4Shell or node-ipc in your Pull Requests and Builds. Protect yourself in 30 seconds with the LunaTrace GitHub App: https://github.com/marketplace/lunatrace-by-lunasec/
Logbook - An extensible Java library for HTTP request and response logging
log4j-affected-db - A community sourced list of log4j-affected software
Logstash - Logstash - transport and process your logs, events, or other data
log4j2-without-jndi - log4j2-core JAR w/o JndiLookup.class
tinylog - tinylog is a lightweight logging framework for Java, Kotlin, Scala, and Android
log4j-log4shell-affected - Lists of affected components and affected apps/vendors by CVE-2021-44228 (aka Log4shell or Log4j RCE). This list is meant as a resource for security responders to be able to find and address the vulnerability
FizzBuzz Enterprise Edition - FizzBuzz Enterprise Edition is a no-nonsense implementation of FizzBuzz made by serious businessmen for serious business purposes.
aegis4j - A Java agent that disables platform features you don't use, before an attacker uses them against you.
graylog - Free and open log management