Logout4Shell
Log4jAttackSurface
Logout4Shell | Log4jAttackSurface | |
---|---|---|
34 | 40 | |
1,727 | 2,085 | |
- | - | |
2.6 | 0.0 | |
over 2 years ago | over 2 years ago | |
Java | ||
MIT License | - |
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Logout4Shell
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Am I able to see which Dropbox accounts have viewed my links?
#1: RCE 0-day exploit found in log4j, a popular Java logging package | 276 comments #2: Godaddy hacked - including admin passwords for both WordPress sites hosted on the platform, as well as passwords for sFTPs, databases and SSL private keys. | 71 comments #3: Log4shell - using the vulnerability to patch the vulnerability - very clever | 64 comments
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Ein etwas anderer Jahresrückblick: 2021 in Google Suchtrends
Hier gibt es eine Impfung gegen Log4Shell. Kein Witz: https://github.com/Cybereason/Logout4Shell
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Log4j : Logpresso patch issue - remove jndi from jar
another option : https://github.com/Cybereason/Logout4Shell
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I heard you can just inject your server with hydroxychloroquine
Yup
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Patching Log4j
This is actually a thing
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Analysis of the 2nd Log4j CVE published earlier (CVE-2021-45046 / Log4Shell2)
We also wrote a Log4Shell payload that will in-memory "hot patch" your server against Log4Shell.
${jndi:ldap://hotpatch.log4shell.com:1389/a}
If you paste that into a vulnerable server (or even throw it into a log statement in your `main` function), that'll patch you against this until you can manage to update properly.
Source code is on GitHub here[0][1] if you want to host it yourself.
(This work is based on Logout4Shell[2], but we rewrote it to fix the bugs, make it work in more places, and also hosted it so that you don't have to muck with DNS and live server stuff.)
0: https://github.com/lunasec-io/lunasec/releases/
1: (Go source code) https://github.com/lunasec-io/lunasec/tree/master/tools/log4...
2: https://github.com/Cybereason/Logout4Shell
- GitHub - Cybereason/Logout4Shell: Use Log4Shell vulnerability to vaccinate a victim server against Log4Shell
- US warns hundreds of millions of devices at risk from newly revealed software vulnerability
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Log4Shell Log4j vulnerability (CVE-2021-44228) – cheat-sheet reference guide
The two examples showcase the potential of the RCE. The JNDI endpoint answers with a serialized java class:
a) https://github.com/Cybereason/Logout4Shell where a class is self-healing the log4j vulnerability by reconfiguring it
b) https://twitter.com/marcioalm/status/1470361495405875200 where the payload is opening an application (calculator) on the host system
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Log4j 0day being exploited (mega thread/ overview)
For those that are interested!
Log4jAttackSurface
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Understanding and Exploiting Log4J Vulnerability
Checkout this link for knowing Log4j impact on manufacturers https://github.com/YfryTchsGD/Log4jAttackSurface
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Dominion Voting wins key decision in lawsuit against Fox News
Just look at the currently ongoing insanity that is the log4j exploit, and how one single exploit has lead to a generic attack that can impact tons of companies. Imagine if a state decided to use voting machines, and someone found this style of exploit in the system.
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Sustainable Open Source Software
Last week (Dec 9th) a major vulnerability was discovered in an open source logging project for Java called log4j. The vulnerability called Log4Shell would allow anyone to remotely run arbitrary code if they sent a message in the right format to the server. This is one of the worst attacks your system can be susceptible to and if you are interested in the technical details of the problem, here is an overview. The attack surface of Log4Shell is staggering, Amazon, Apple, Google, and the Apache Server are affected; it can almost not get bigger than this. We will see the real fallout of Log4Shell in the next weeks and months as right now servers worldwide are being scanned and prodded for this vulnerability.
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Vulnerability Advisory: Apache Log Binary (Log4J)
Companies should verify they are not running any exposed Log4j Java code. Here is a list of impacted 3rd party software for your reference. If you find a server at risk, there are three potential ways to fix it as follows.
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Using discovery to find devices with log4j installed
Looking for vendors/software on known lists like https://github.com/YfryTchsGD/Log4jAttackSurface
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Schutz vor Log4j-Lücke – was hilft jetzt und was eher nicht
Blender ist nicht betroffen, #42
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3 billion devices run log4j... including blender
It does and was also affected by log4j.
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PSA: if you're hosting any public facing services make sure they're not vulnerable to the 0-day log4j RCE.
Thanks, sure it isn't complete but it does contain some scary and surprising (at least when first reading, of course the really aren't) things like: https://github.com/YfryTchsGD/Log4jAttackSurface/blob/master/pages/UniFi.md
- My feeds are full with the Log4j vulnerability, but let’s think about it for a moment…
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Security Vulnerability in Minecraft: Java Edition
Apparently there's proof Steam along with many others are vulnerable.
What are some alternatives?
grype - A vulnerability scanner for container images and filesystems
nimbus-eth2 - Nim implementation of the Ethereum Beacon Chain
airsonic-advanced
teku - Open-source Ethereum consensus client written in Java
interactsh - An OOB interaction gathering server and client library
apache-log4j-rce-poc
Apache Log4j 2 - Apache Log4j 2 is a versatile, feature-rich, efficient logging API and backend for Java.
GDLauncher - GDLauncher is a simple, yet powerful Minecraft custom launcher with a strong focus on the user experience
Logout4Shell - Use Log4Shell vulnerability to vaccinate a victim server against Log4Shell
log4j-detector - A public open sourced tool. Log4J scanner that detects vulnerable Log4J versions (CVE-2021-44228, CVE-2021-45046, etc) on your file-system within any application. It is able to even find Log4J instances that are hidden several layers deep. Works on Linux, Windows, and Mac, and everywhere else Java runs, too! TAG_OS_TOOL, OWNER_KELLY, DC_PUBLIC
active-scan-plus-plus - ActiveScan++ Burp Suite Plugin