Have you ever read the article “RCE via Symfony Secret Fragments” ? If you haven’t read it, there are so many articles on Medium. Shodan…Continue reading on DevOps.dev » (https://blog.devops.dev/old-rce-worth-3362-1af0cd70c459?source=rss------bug_bounty-5)

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hacking: security in practice
Can someone steal my GDrive files if I ran an unknown code in Google Colab?

Hey everyone, maybe this could be a dump question but I gotta ask to be more relaxed. I wanted to transfer a file from my mega storage to my google drive account without having to download it and uploading it next, I found a yt video where the solution was a google colab script, I ran it and everything went ok, it worked. However, I started to worry about it bc of all the permissions i gave to the platform without checking the code of the colab correctly, I have little to no knowledge about coding so I just skimmed it. Can someone help me to check if the script was malicious or if I have nothing to worry about?):

The colab is this: https://colab.research.google.com/drive/1SI-ztZId0bTKGPV-RJxebewzOAuPoNEE

A lot of thanks in advance, I know this can be a hassle but I promise to be more careful.

submitted by /u/PaperPlane47
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Registrations Open for IWCON2022 Version 2.0 — the Online International Cybersecurity Conference
https://infosecwriteups.com/registrations-open-for-iwcon2022-version-2-0-the-online-international-cybersecurity-conference-ff4c4d1cddf3?source=rss------bug_bounty-5

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Book your seats today!Continue reading on InfoSec Write-ups » (https://infosecwriteups.com/registrations-open-for-iwcon2022-version-2-0-the-online-international-cybersecurity-conference-ff4c4d1cddf3?source=rss------bug_bounty-5)

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Registrations Open for IWCON2022 Version 2.0 — the Online International Cybersecurity Conference

Book your seats today!Continue reading on InfoSec Write-ups »
Read more...

Android Pentesting 101 — Part 3
https://infosecwriteups.com/android-pentesting-101-part-3-2bf846b05594?source=rss------bug_bounty-5

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Welcome to Part 3 of Android Pentesting. This series is about how you can hack into Android and find vulnerabilities in it using various…Continue reading on InfoSec Write-ups » (https://infosecwriteups.com/android-pentesting-101-part-3-2bf846b05594?source=rss------bug_bounty-5)

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Ermir - An Evil Java RMI Registry
http://www.kitploit.com/2022/10/ermir-evil-java-rmi-registry.html

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Ermir is an Evil/Rogue RMI Registry, it exploits (https://www.kitploit.com/search/label/Exploits) unsecure deserialization (https://www.kitploit.com/search/label/Deserialization) on any Java code calling standard RMI methods on it (list()/lookup()/bind()/rebind()/unbind()).
Requirements Ruby v3 or newer. Installation Install Ermir from rubygems.org: $ gem install ermir
or clone the repo and build the gem: $ git clone https://github.com/hakivvi/ermir.git
$ rake install
Usage Ermir is a cli gem, it comes with 2 cli files ermir and gadgetmarshal, ermir is the actual gem and the latter is just a pretty interface to GadgetMarshaller.java (https://github.com/hakivvi/ermir/blob/main/helpers/gadgetmarshaller/GadgetMarshaller.java) file which rewrites the gadgets (https://www.kitploit.com/search/label/Gadgets) of Ysoserial (https://github.com/frohoff/ysoserial) to match MarshalInputStream requirements, the output should be then piped into ermir or a file, in case of custom gadgets use MarshalOutputStream instead of ObjectOutputStream to write your serialized object to the output stream. ermir usage: RMI Registry which exploits unsecure Java deserialization on any Java code calling standard RMI methods on it. Usage: ermir [options] -l, --listen bind the RMI Registry (https://www.kitploit.com/search/label/Registry) to this ip and port (default: 0.0.0.0:1099). -f, --file path to file containing the gadget to be deserialized. -p, --pipe read the serialized gadget from the standard input stream. -v, --version print Ermir version. -h, --help print options help. Example: $ gadgetmarshal /path/to/ysoserial.jar Groovy1 calc.exe | ermir --listen 127.0.0.1:1099 --pipe" dir="auto">➜ ~ ermir
Ermir by @hakivvi * https://github.com/hakivvi/ermir.
Info:
Ermir is a Rogue/Evil RMI Registry which exploits unsecure Java deserialization on any Java code calling standard RMI methods on it.
Usage: ermir [options]
-l, --listen bind the RMI Registry to this ip and port (default: 0.0.0.0:1099).
-f, --file path to file containing the gadget to be deserialized.
-p, --pipe read the serialized gadget from the standard input stream.
-v, --version print Ermir version.
-h, --help print options help.
Example:
$ gadgetmarshal /path/to/ysoserial.jar Groovy1 calc.exe | ermir --listen 127.0.0.1:1099 --pipe gadgetmarshal usage: ➜ ~ gadgetmarshal
Usage: gadgetmarshal /path/to/ysoserial.jar Gadget1 cmd (optional)/path/to/output/file How does it work? java.rmi.registry.Registry offers 5 methods: list(), lookup(), bind(), rebind(), unbind(): public Remote lookup(String name): lookup() searches for a bound object in the registry by its name, the registry returns a Remote object which references the remote object that was looked up, the returned object is read using MarshalInputStream.readObject() which is just another layer on top of ObjectInputStream, basically it excpects after each class/proxy descriptor (TC_CLASSDESC/TC_PROXYCLASSDESC) an URL that will be used to load this class or proxy class. this is the same wild bug that was fixed in jdk7u21 (https://docs.oracle.com/javase/7/docs/technotes/guides/rmi/enhancements-7.html). (Ermir does not specify this URL as only old Java version are vulnerable, instead it just write null (https://github.com/hakivvi/ermir/blob/240880237eb3a565daf1f5d79be19ac1d21cb4c8/helpers/gadgetmarshaller/GadgetMarshaller.java#L54)). as Ysoserial (https://github.com/frohoff/ysoserial) gadgets are being serialized using ObjectOutputStream, Ermir uses gadgetmarshal -a wrapper around GadgetMarshaller.java (https://github.com/hakivvi/ermir/blob/main/helpers/gadgetmarshaller/GadgetMarshaller.java)- to serialize the specified gagdet to match MarshalInputStream requirements.

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public String[] list(): list() asks the registry for all the bound objects names, while String type cannot be subsitued with a malicious gadget as it is not like any ordinary object and it is not read using readObject() but rather readUTF(), however as list() returns String[] which is an actual object and it is read using readObject(), Ermir sends the gadget instead of this String[] type.

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public void bind(java.lang.String $param_String_1, java.rmi.Remote $param_Remote_2): bind() binds an object to a name on the registry, in bind() case the return type is void and there is nothing being returned, however if the registry specifies in the RMI return data packet that this return is an execptional return, the client/server client will call readObject() despite the return type is void, this is how the regitry sends exceptions to its client (usually java.lang.ClassNotFoundException), once again Ermir will deliver the serialized gadget instead of a legitimate Exception object.

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public void rebind(java.lang.String $param_String_1, java.rmi.Remote $param_Remote_2): rebind() replaces the binding of the passed name with the supplied remote reference, also returns void, Ermir returns an exception just like bind(). public void unbind(java.lang.String $param_String_1): unbind() unbinds a remote object by name in the RMI registry, this one also returns void. PoC

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Contributing Bug reports and pull requests are welcome on GitHub at https://github.com/hakivvi/ermir. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct (https://github.com/hakivvi/ermir/blob/main/CODE_OF_CONDUCT.md). License The gem is available as open source under the terms of the MIT License (https://opensource.org/licenses/MIT). Code of Conduct Everyone interacting in the Ermir project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct (https://github.com/hakivvi/ermir/blob/main/CODE_OF_CONDUCT.md).

Download Ermir (https://github.com/hakivvi/ermir)

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Hacking on Medium
TryHackme | ToolsRus — Write-up

https://cdn-images-1.medium.com/max/1000/0*v5jOkrDpu3F3lLdN.png
Today I will walk you through completing the TryHackMe room ToolsRus. First time I have done a write up and it’s mainly to reinforce my…

Continue reading on Medium »

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