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.
The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mutt | Mutt | * | 1.14.4 (excluding) |
| Mutt | Ubuntu | bionic | * |
| Mutt | Ubuntu | eoan | * |
| Mutt | Ubuntu | focal | * |
| Mutt | Ubuntu | trusty | * |
| Mutt | Ubuntu | upstream | * |
| Mutt | Ubuntu | xenial | * |
| Neomutt | Ubuntu | bionic | * |
| Neomutt | Ubuntu | eoan | * |
| Neomutt | Ubuntu | trusty | * |
| Neomutt | Ubuntu | upstream | * |