The File Blocker feature in Clearswift MAILsweeper for SMTP 4.2 allows remote attackers to bypass e-mail attachment filtering policies via a modified name in a Content-Type header.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mailsweeper | Clearswift_limited | 4.2 (including) | 4.2 (including) |