Mutt before 1.14.4 and NeoMutt before 2020-06-19 have a STARTTLS buffering issue that affects IMAP, SMTP, and POP3. When a server sends a “begin TLS” response, the client reads additional data (e.g., from a man-in-the-middle attacker) and evaluates it in a TLS context, aka “response injection.”
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14954
Reference (s):
- DEBIAN:DSA-4707
- URL: https://www.debian.org/security/2020/dsa-4707
- DEBIAN:DSA-4708
- URL: https://www.debian.org/security/2020/dsa-4708
- FEDORA:FEDORA-2020-1cb4c3697b