Encrypting ClientHello - EXIM eMail Servers Exposed, Windows 11 Passkeys, Bing Chat Malware Risk

• Exim email server ignored ZDI's responsible disclosure of critical remote code execution flaws for over a year, putting millions of servers at risk.
• Malicious ads are appearing in Bing Chat responses, promoting fake sites distributing malware.
• Windows 11 now natively supports passkeys, though browser support may make this redundant.
• Researchers exploit WiFi beamforming side-channel to potentially reveal keystrokes, but practicality is limited.
• The ECH TLS extension encrypts the ClientHello packet to hide SNI data.
• Exim disclosure timeline and impact on millions of vulnerable servers.
• Bing chat ads mimic search result malvertising risks amplified by chatbot trust.

Show notes: https://www.grc.com/sn/SN-942-Notes.pdf

Hosts: Steve Gibson and Leo Laporte
Security Now episode 942
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