CVE Catalog

CVE-2005-0337

High
Published: Translated: NVD NIST

Summary

Vulnerability in Postfix 2.1.3 allows a remote attacker to bypass email restrictions and perform mail relaying by sending mail to an IPv6 hostname when /proc/net/if_inet6 is not available and permit_mx_backup is enabled in smtpd_recipient_restrictions.

Risk Assessment

The organization is exposed to unauthorized mail relaying, which can lead to the server being used as an open relay for spam or phishing attacks.

Recommendation

It is recommended to upgrade Postfix to a version newer than 2.1.3 or disable the permit_mx_backup option in the smtpd_recipient_restrictions configuration if not required.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS