The 55_options_traceback.dpatch patch for mailman 2.1.5 in Ubuntu 4.10 displays a different error message depending on whether the e-mail address is subscribed to a private list, which allows remote attackers to determine the list membership for a given e-mail address.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mailman | Gnu | 2.1.5 | 2.1.5 |