Log4JShell-Bytecode-Detector
Apache Log4j 2
| Log4JShell-Bytecode-Detector | Apache Log4j 2 | |
|---|---|---|
| 4 | 108 | |
| 50 | 3,273 | |
| - | 0.4% | |
| 0.0 | 9.9 | |
| about 2 years ago | about 23 hours ago | |
| Java | Java | |
| MIT License | Apache License 2.0 |
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Log4JShell-Bytecode-Detector
- If you are hunting for log4j vulns, and you are already considering nested .jars..
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Log4JShell ByteCode Detector
To check if your jar file is affected by the critical CVE-2021-44228, we provide an open-source command line tool https://github.com/CodeShield-Security/Log4JShell-Bytecode-Detector. The tool scans the jar file and compares the classses against a set of pre-computed hashes of the vulnerable Log4j classes. Since our tool only uses the hash and fingerprints of bytecode classes, no source code needs to be available.
- Zero-Day RCE Vulnerability CVE-2021-44228 aka Log4Shell: What We Know So Far
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RCE 0-day exploit found in log4j, a popular Java logging package
u/sanitybit My colleagues have written a detector for the vulnerability: https://github.com/CodeShield-Security/Log4JShell-Bytecode-Detector
Apache Log4j 2
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Hackers exploited Windows 0-day for 6 months after Microsoft knew of it
I don't think that's a good example. While Apache devs are volunteers and Microsoft devs are employees, they were criticized for their slow response time and seeming lack of urgency until it was far too late.
https://github.com/apache/logging-log4j2/pull/608#issuecomme...
- Create an alternative async logger implementation using JCTools
- Log4j requesting feedback on which modules/features to drop
- The Unsung Heroes of Open Source: The Dedicated Maintainers Behind Lesser-Known Projects
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Studying Log4Shell
The official website. The vulnerability was introduced in 2.0-beta7 which was released in 2013.
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The Dedicated Maintainers Behind Lesser-Known Open Source Projects
However, there are many open source projects that are widely used but not well-known, including cURL, ImageMagick, MyCLI, Homebrew, Apache Log4j, and OpenSSL. This article will take a closer look at these unsung heroes of the open source world. I do not want to give them a business model or financial advice in this article. This largely depends on the author's personal experience and values. I just want to raise more awareness about these open source projects.
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Apache POI Setup Logging Error
What you need is log4j-core, what you downloaded is some kind of connector between log4j and JUL. Tbh I don't know what JUL is, but that's not important. You can get log4j-core on from the official website - https://logging.apache.org/log4j/2.x/ or in maven repo. In case you're not using maven, I highly, highly recommend you using it for managing your dependencies.
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Log4Shell Still Has Sting in the Tail
> When it was first revealed in early December 2021, the Log4Shell bug was described as one of the most severe security vulnerabilities ever.
> The Apache Software Foundation, which maintains the open-source tool, quickly released a patch...
Apache horribly mismanaged this and did not release a patch until it was already widely known and being exploited in the wild. They also messed up and had to release several subsequent patches to actually fix the vulnerability.
Remember: this vulnerability was disclosed to them in November.
https://github.com/apache/logging-log4j2/pull/608#issuecomme...
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The US Cybersecurity and Infrastructure Agency open-sourced a new tool named Scuba
Think back to the Log4J event, were you affected? (https://github.com/apache/logging-log4j2)
- In One Minute : log4j2
What are some alternatives?
semgrep-rules - Semgrep rules registry
Logback - The reliable, generic, fast and flexible logging framework for Java.
apache-log4j-rce-poc
reload4j - reload4j is a drop-in replacement for log4j 1.2.17
apache-log4j-rce-poc
tinylog - tinylog is a lightweight logging framework for Java, Kotlin, Scala, and Android
active-scan-plus-plus - ActiveScan++ Burp Suite Plugin
Logstash - Logstash - transport and process your logs, events, or other data
Log4jAttackSurface
SLF4J - Simple Logging Facade for Java
log4j_CVE-2021-44228_tester - Multithreaded log4j vulnerability scanner using only bash! Tests all JNDI protocols, HTTP GET/POST, and 84 headers. [Moved to: https://github.com/ssstonebraker/log4j-scan-turbo]
kibana - Your window into the Elastic Stack