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."
{ "ubuntu_priority": "medium", "availability": "No subscription required", "binaries": [ { "binary_name": "mutt", "binary_version": "1.5.24-1ubuntu0.4" }, { "binary_name": "mutt-dbg", "binary_version": "1.5.24-1ubuntu0.4" }, { "binary_name": "mutt-dbgsym", "binary_version": "1.5.24-1ubuntu0.4" }, { "binary_name": "mutt-patched", "binary_version": "1.5.24-1ubuntu0.4" }, { "binary_name": "mutt-patched-dbgsym", "binary_version": "1.5.24-1ubuntu0.4" } ] }
{ "ubuntu_priority": "medium", "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro", "binaries": [ { "binary_name": "neomutt", "binary_version": "20171215+dfsg.1-1ubuntu0.1~esm1" }, { "binary_name": "neomutt-dbgsym", "binary_version": "20171215+dfsg.1-1ubuntu0.1~esm1" } ] }
{ "ubuntu_priority": "medium", "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro", "binaries": [ { "binary_name": "neomutt", "binary_version": "20191207+dfsg.1-1.1ubuntu0.1~esm1" }, { "binary_name": "neomutt-dbgsym", "binary_version": "20191207+dfsg.1-1.1ubuntu0.1~esm1" } ] }