The match_component function in smtp-tls.c in libESMTP 1.0.3.r1, and possibly other versions including 1.0.4, treats two strings as equal if one is a substring of the other, which allows remote attackers to spoof trusted certificates via a crafted subjectAltName.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Libesmtp | Stafford.uklinux | 0.1 (including) | 0.1 (including) |
| Libesmtp | Stafford.uklinux | 0.1-a (including) | 0.1-a (including) |
| Libesmtp | Stafford.uklinux | 0.2 (including) | 0.2 (including) |
| Libesmtp | Stafford.uklinux | 0.3 (including) | 0.3 (including) |
| Libesmtp | Stafford.uklinux | 0.4 (including) | 0.4 (including) |
| Libesmtp | Stafford.uklinux | 0.5 (including) | 0.5 (including) |
| Libesmtp | Stafford.uklinux | 0.6 (including) | 0.6 (including) |
| Libesmtp | Stafford.uklinux | 0.6-a (including) | 0.6-a (including) |
| Libesmtp | Stafford.uklinux | 0.6.1 (including) | 0.6.1 (including) |
| Libesmtp | Stafford.uklinux | 0.7.0 (including) | 0.7.0 (including) |
| Libesmtp | Stafford.uklinux | 0.7.1 (including) | 0.7.1 (including) |
| Libesmtp | Stafford.uklinux | 0.8.0 (including) | 0.8.0 (including) |
| Libesmtp | Stafford.uklinux | 0.8.1 (including) | 0.8.1 (including) |
| Libesmtp | Stafford.uklinux | 0.8.2 (including) | 0.8.2 (including) |
| Libesmtp | Stafford.uklinux | 0.8.3 (including) | 0.8.3 (including) |
| Libesmtp | Stafford.uklinux | 0.8.4 (including) | 0.8.4 (including) |
| Libesmtp | Stafford.uklinux | 0.8.5 (including) | 0.8.5 (including) |
| Libesmtp | Stafford.uklinux | 0.8.6 (including) | 0.8.6 (including) |
| Libesmtp | Stafford.uklinux | 0.8.7 (including) | 0.8.7 (including) |
| Libesmtp | Stafford.uklinux | 0.8.8 (including) | 0.8.8 (including) |
| Libesmtp | Stafford.uklinux | 0.8.9 (including) | 0.8.9 (including) |
| Libesmtp | Stafford.uklinux | 0.8.10 (including) | 0.8.10 (including) |
| Libesmtp | Stafford.uklinux | 0.8.10-p1 (including) | 0.8.10-p1 (including) |
| Libesmtp | Stafford.uklinux | 0.8.11 (including) | 0.8.11 (including) |
| Libesmtp | Stafford.uklinux | 0.8.12 (including) | 0.8.12 (including) |
| Libesmtp | Stafford.uklinux | 1.0 (including) | 1.0 (including) |
| Libesmtp | Stafford.uklinux | 1.0-rc1 (including) | 1.0-rc1 (including) |
| Libesmtp | Stafford.uklinux | 1.0.1 (including) | 1.0.1 (including) |
| Libesmtp | Stafford.uklinux | 1.0.2 (including) | 1.0.2 (including) |
| Libesmtp | Stafford.uklinux | 1.0.3 (including) | 1.0.3 (including) |
| Libesmtp | Stafford.uklinux | 1.0.3-r1 (including) | 1.0.3-r1 (including) |
| Libesmtp | Stafford.uklinux | 1.0.4 (including) | 1.0.4 (including) |
| Libesmtp | Ubuntu | dapper | * |
| Libesmtp | Ubuntu | hardy | * |
| Libesmtp | Ubuntu | intrepid | * |
| Libesmtp | Ubuntu | jaunty | * |
| Libesmtp | Ubuntu | karmic | * |
| Libesmtp | Ubuntu | upstream | * |