Postfix 2.1.3, when /proc/net/if_inet6 is not available and permit_mx_backup is enabled in smtpd_recipient_restrictions, allows remote attackers to bypass e-mail restrictions and perform mail relaying by sending mail to an IPv6 hostname.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade postfix | Jul 30, 2024 | May 2, 2005 |
| Postfix | — | Upgrade to the latest version of Postfix | Jul 3, 2014 | May 2, 2005 |
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