Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters. An authenticated remote SMTP client can insert newline characters into a spool file (which indirectly leads to remote code execution as root) via AUTH= in a MAIL FROM command.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Exim | Exim | 4.00 (including) | 4.94.2 (excluding) |
| Exim4 | Ubuntu | bionic | * |
| Exim4 | Ubuntu | devel | * |
| Exim4 | Ubuntu | esm-infra-legacy/trusty | * |
| Exim4 | Ubuntu | esm-infra/bionic | * |
| Exim4 | Ubuntu | esm-infra/focal | * |
| Exim4 | Ubuntu | esm-infra/xenial | * |
| Exim4 | Ubuntu | focal | * |
| Exim4 | Ubuntu | groovy | * |
| Exim4 | Ubuntu | hirsute | * |
| Exim4 | Ubuntu | impish | * |
| Exim4 | Ubuntu | jammy | * |
| Exim4 | Ubuntu | trusty | * |
| Exim4 | Ubuntu | trusty/esm | * |
| Exim4 | Ubuntu | xenial | * |