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Hack WPA2-PSK clients with Key Re-installation Attacks




Mathy Vanhoef discovered serious weaknesses in WPA2, a protocol that secures all modern protected Wi-Fi networks. An attacker within range of a victim can exploit these weaknesses using key reinstallation attacks (KRACKs). Concretely, attackers can use this novel attack technique to read information that was previously assumed to be safely encrypted. This can be abused to steal sensitive information such as credit card numbers, passwords, chat messages, emails, photos, and so on. The attack works against all modern protected Wi-Fi networks. Depending on the network configuration, it is also possible to inject and manipulate data. For example, an attacker might be able to inject ransomware or other malware into websites.
The weaknesses are in the Wi-Fi standard itself, and not in individual products or implementations. Therefore, any correct implementation of WPA2 is likely affected. To prevent the attack, users must update affected products as soon as security updates become available. Note that if your device supports Wi-Fi, it is most likely affected. During initial research,it is discovered that Android, Linux, Apple, Windows, OpenBSD, MediaTek, Linksys, and others, are all affected by some variant of the attacks. For more information about specific products, consult the database of CERT/CC, or contact your vendor.
Below is the detail of some router vendors that have issued KRACH Patches
the best way to protect yourself from this exploit is to not use Wi-Fi at all until a proper fix has been proven. CERT has released notes on the KRACK problem, including a list of vendors whose equipment is vulnerable.
Some security-minded companies have already worked on fixes and are offering patches. Check back often, as we will keep this list updated.
There are also a number of vendors listed as "Not affected" on the CERT website without further explanation from the vendors themselves. These include:


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WannaCry Ransomware | Solution | Fix




Since the WannaCry ransomware ripped through the internet in May 2017, infecting hundreds of thousands of machines and locking up critical systems from health care to transportation, cryptographers have searched for a cure. Finding a flaw in WannaCry’s encryption scheme, after all, could decrypt all those systems without any ransom.

Now one French researcher says he’s found at least a hint of a very limited remedy. The fix still seems too buggy, and far from the panacea WannaCry victims have hoped for. But if Adrien Guinet’s claims hold up, his tool could unlock some infected computers running Windows XP, the aging, largely unsupported version of Microsoft’s operating system, which analysts believe accounts for some portion of the WannaCry plague.
"Does not erase the prime numbers from memory before freeing the associated memory," says Guinet.
Based on this finding, Guinet released a WannaCry ransomware decryption tool, named WannaKey

"It does so by searching for them in the wcry.exe process. This is the process that generates the RSA private key. The main issue is that the CryptDestroyKey and CryptReleaseContext does not erase the prime numbers from memory before freeing the associated memory." says Guinet



So, that means, this method will work only if:

  1. The affected computer has not been rebooted after being infected.
  2. The associated memory has not been allocated and erased by some other process.

"In order to work, your computer must not have been rebooted after being infected. Please also note that you need some luck for this to work (see below), and so it might not work in every case!," Guinet says.

Download Tool here @ https://github.com/gentilkiwi/wanakiwi/releases


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