Blog.Bajiri

 This  article , covers a recent tweet that displayed a vulnerability where a specific SSID name could permanently disable an iPhone's wifi functions. Luckily for user, @vm_call, a user in the replies found a way to fix the wifi. The article covers the process by which the SSID is processed and what the actual issue that causes the crash is. It seems a bit weird to write a blog post about a blog post, but this topic was incredibly interesting and the original tweet and the conversation around it was fun to follow. As for the potential for exploitation for this vulnerability, it isn't something that could be used in it's current state. The target can see the name of the SSID they are connecting to, so they would know that they were connecting to a potentially dangerous network. 

 My plan for this week was to go over and talk about IP headers and datagrams. However, while looking through some resources, I find a document that can explain it far better than I can. So instead of diving into the technical nitty-gritty of packets and headers, I'll let Burton Rosenberg of the University of Miami's Computer Science departmen t handy article explain it.  With my original plans for this article taken care of, I instead thought that it would be a good idea to cover how to actually examine a packet and apply this information. It is one thing to know the theory, and another entirely to apply it. With that in mind, I decided to play around with Wireshark and throw together a little demonstration depicting the process.  This is a Wireshark window that shows the HTTP traffic to and from my VM. To generate this information, I started Wireshark, confirmed in the capture options that it was using the correct adapter, and performed a google search. The packet that ...

Wifi fragmentation and aggregation attacks (FragAttacks) are a new collection of vulnerabilities in which a threat actor can exfiltrate data or attack victims within radio range. Mathy Vanhoef, a postdoctoral researcher at New York University Abu Dhabi, recently published his paper, Fragment and Forge: Breaking Wi-Fi through Frame Aggregation and Fragmentation , detailing several attack vectors and examining the intricacies of the aggregation vulnerabilities that have been part of the 802.11 standards since the inception in 1997.  Quite interestingly, every device tested was susceptible to one or more of the FragAttacks. While several 802.11 standards make these attacks harder to perform, they can be executed on all devices across all standards. It's a good thing then, that there was a nine-month embargo on information related to these attacks, allowing manufacturers to provide security updates to affected devices. Mathy Vanhoef has also created a website documenting the FragAttack...