The problem in this attack, Amit said, is that the mobile app keeps the 301 response in cache and permanently connects to the attacker’s web server. That server can then drop any content into ...

A desync attack method leveraging HTTP/1.1 vulnerabilities impacted many websites and earned researchers more than $200,000 ...

They started by causing apps to send HTTP requests to port 12387. A month later, Meta Pixel stopped sending this data, even though Facebook and Instagram apps continued to monitor the port.

Web servers like Apache or Nginx sit idle waiting for new requests, he said, but Zappa has the server created after the HTTP request comes in through the API gateway.

HTTP Injector apps work by leveraging the fact that some captive portals allow the user to establish connections to some Internet sites included in "data-free" offerings.