OpenAI's Codex agent helped uncover an HTTP/2 exploit called HTTP/2 Bomb that can crash web servers in seconds. The attack chains HPACK compression bomb and Slowloris-style hold techniques on default HTTP/2 setups of nginx, Apache, Microsoft IIS, Envoy, and Cloudflare Pingora. As of Thursday, Microsoft IIS and Cloudflare Pingora lack patches though Cloudflare says no patch is needed. Upwards of 880,000 websites using vulnerable servers may be affected.
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CISA: Hackers now exploit SolarWinds Serv-U flaw to crash servers
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