Vaultive · Vaultive O365 · CVE-2017-7229
**Name of the Vulnerable Software and Affected Versions**
Vaultive O365 versions prior to 4.5.21
**Description**
The issue affects PGP/MIME encrypted messages processed by the Vaultive O365 frontend. When such messages are injected via IMAP or SMTP, their Content-Type is altered from 'multipart/encrypted' to 'text/plain'. This modification causes most PGP/MIME-capable mail user agents to fail at decrypting the messages properly, resulting in a Denial of Service. A common consequence of this issue is that senders are requested to resend the emails without encryption, potentially leading to Information Disclosure.
**Recommendations**
For versions prior to 4.5.21, update to version 4.5.21 or later to resolve the issue.