Security Now

Encrypting Client Hello (1x942)

Air date: Oct 03, 2023

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.