July 31, 2024 at 10:51AM
Newly discovered vulnerabilities in hosted email services can allow threat actors to spoof sender identities and bypass security measures. The flaws, CVE-2024-7208 and CVE-2024-7209, enable authenticated attackers to send emails from different domains, potentially affecting over 20 million domains and numerous vendors. Measures to address the vulnerabilities include enhanced identity verification and strict domain owner protections.
Based on the meeting notes, the key takeaways are:
1. Two newly identified vulnerabilities, CVE-2024-7208 and CVE-2024-7209, pose a risk to hosted email services by allowing threat actors to spoof the sender’s identity and bypass existing protections.
2. These vulnerabilities allow authenticated attackers to send spoofed emails from hosted domains, circumventing Sender Policy Framework (SPF), Domain Key Identified Mail (DKIM), and Domain-based Message Authentication, Reporting, and Conformance (DMARC) mechanisms.
3. The flaws impact more than 20 million domains, potentially including high-profile brands, and could affect over 50 vendors.
4. To mitigate the vulnerabilities, CERT/CC advises hosting providers to verify the identity of authenticated senders against authorized domains and recommends domain owners to implement strict measures to protect their identity against spoofing.
5. The findings of these vulnerabilities will be presented at the upcoming Black Hat conference by the PayPal security researchers who discovered them.
Let me know if you need any additional information or if there is anything else I can assist you with.