• 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

Download or subscribe to this show at https://twit.tv/shows/security-now.

Get episodes ad-free with Club TWiT at https://twit.tv/clubtwit

You can submit a question to Security Now at the GRC Feedback Page.

For 16kbps versions, transcripts, and notes (including fixes), visit Steve's site: grc.com, also the home of the best disk maintenance and recovery utility ever written Spinrite 6.

Sponsors:

• canary.tools/twit - use code: TWIT
• expressvpn.com/securitynow
• kolide.com/securitynow