GURU Копирование материалов разрешено только с активной ссылкой на источнике. Скачайте программу AltStore на свой компьютер и запустите её. Подключите свой iPhone к компьютеру с помощью USB-кабеля. Если у вас Mac, то запустите приложение Почта и активируйте плагин AltPlugin.
Вам нужно будет ввести данные своего Apple ID в процессе установки.
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Найдите профиль с вашим AppleID и откройте его. Когда завершится скачивание, откройте скачанный файл через AltStore на iPhone или iPad. I could not identify the actual payload content transported by each stream. This part explains how the integrity of SRTP packets is protected. Hence, integrity protection of these SRTP packets is broken. The consequences of this finding are unknown, since I could not reveal what these streams are actually used for.
This behavior has to be analyzed more precisely. I demonstrated how the analysis of network traffic, binary application files and the dynamic runtime behavior of WhatsApp clients helped to reveal protocol steps. The conducted research faces several limitations. There are four streams, which are initialized with encryption keys from an unknown origin. To conclude, this article showed that it can be difficult for application developers to hide the implementation of mobile applications. Tools like Frida enable researchers and attackers to gather critical information about the implementation of mobile applications in a short amount of time.
Application developers should bear in mind that cryptographic keys can easily be extracted with such tools. For impeding the dynamic analysis of an application, it is useful to strip symbol names from application binaries. Moreover, application developers should remove string constants, which contain critical application information or help to locate functions. Original text by Thomas Claburn. Among them, version 1 did not require a password.
And since the interpreter is running as root, Garret explains, you have arbitrary command execution. However, while TDDP listens on all interfaces, the default firewall prevents network access, says Garrett. Even so, vulnerability to a local attack could be exploited if an attacker manages to get a malicious download onto a machine connected to an SR20 router. Garrett concluded his disclosure by urging TP-Link to provide a way to report security flaws and not to ship debug daemons on production firmware. Original text by Catalin Cimpanu.
At the Black Hat Asia security conference, security researchers from Positive Technologies disclosed the existence of a previously unknown and undocumented feature in Intel chipsets. Unauthorized access to the VISA feature would allow a threat actor to intercept data from the computer memory and create spyware that works at the lowest possible level.
But despite its extremely intrusive nature, very little is known about this new technology. Normally, this combination of secrecy and a secure default should keep Intel users safe from possible attacks and abuse. As Ermolov said yesterday, VISA is not a vulnerability in Intel chipsets, but just another way in which a useful feature could be abused and turned against users. Chances that VISA will be abused are low. Original text by Phil. All the 3 boards are in free access on a desk beside the organisation team. When you power-up the device using the black USB cable, it start running and show the activity on the network connector.
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As this device is a development board, the left secable part is a ST-Link V2 ready to handle the right part of the board, composed of the main MCU and a few components. At this point, nothing other is possible over the serial port, impossible to send command to the board. I can deduce that only the official boards can do it because they own a client side certificate in their flash. The public certificate is the first difference, and the 32 bytes at offset 0xB0 is the second one. Loading the firmware and giving at this first stage the correct description to Ghidra is mandatory.
The correct one is Cortex thanks Balda for the correction :. Now we need to find the public and private key in the firmware. The first and winning idea is to take back the serial log and try to identify the SDK used. Then, you need to dig more for guessing how the TLS is done. From this sample code found in the SDK, you can find your way in the firmware:. Then, digging more in the TLS part is needed.
The funniest part of the challenge is here.
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This code is nothing more than a bitwise AND with 2 offset in memory. But, as there is some flipping bits in those 64 bytes during the powerup sequence, another 64 bytes table is used as mask for keeping only the stables states bits, and remove the flipping one. Even if the debug port is closed. With the memory dump and the flash dump, here is the code who compute and display the private key:. At this point it was 3H But I was wrong. It was far more complex to finish the reverse until the flag, and the 10 minutes changed to another 4 hours of job.
My guess is this an interrupt hook to an external crypto-engine who run in a few cycles a cryptographic function. With this reference source code, the unknown function can be commented and is a little bit more readable:. So the unknown part of the private key become:.
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EDIT: no, not a little! I have something looking like the private key and the full chain of certificate. First, craft the private key. Thanks to Sylvain for correct my silly Python code. And finally generate a single file with all the stuff to import it on a regular browser:.
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You just need to try and pray…. Yes, Marius arrived during the CTF at this point at 3h This year 2 challenges were here for our pleasure. I must say this challenge occupy me during the whole CTF. Solving a task close to a real project is far away more exiting, and it was the case here! With this more accurate description I would not tried it alone, and I would asked for some helps to other members of the team at the very first moment of the CTF.
This year you win, so 1 — 1. See you the 15th of November for the next edition of GreHack. Thanks for your time and the technical trix on Ghidra during the CTF. Big up guyz! Pretty sure that together we would solve it in time, bourricot! See you next year! Original text by Dinesh Shetty. Majority of the times during a penetration test or bug-bounty engagement, you might encounter customers who limit the scope of testing to non-jailbroken devices running the latest mobile OS. How do you dynamically instrument the application in those cases?
How do you trace the various functionalities in the application while trying to attack the actual application logic? Normally Frida is always installed and run on Jailbroken devices. That process is pretty straight-forward. However, the complexity increases when you want to run it on non-jailbroken devices. The only requirement at this stage is an unencrypted IPA file.
This is normally provided by the customer. Ensure that you do a checksum check and verify it with the custom before you start testing.
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In our case, lets target the Uber application from the AppStore. Make sure you are logged in to Xcode using your Apple account. Run the application on the device. You have to do this step for every new device that you want to use for testing.
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If we try to install the application now, it will fail because of code sign issues. We need to fix it before we proceed. Your iOS device will appear to be frozen till you enter the Frida commands. To confirm if Frida gadget is actually working make use of the following command:. That is all I have for this article. In later articles we will talk about how to use Frida to perform a variety of attacks on Mobile Applications. Original text by orange. This is the Hacking Jenkins series part two! As the previous article said, in order to utilize the vulnerability, we want to find a code execution can be chained with the ACL bypass vulnerability to a well-deserved pre-auth remote code execution!
But, I failed.
While reviewing notes, I found another exploitation way on a gadget that I failed to exploit before! Therefore, the part two is the story for that!