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Family: Red Hat Local Security Checks --> Category: infos

RHSA-2005-152: postfix Vulnerability Scan

Vulnerability Scan Summary
Check for the version of the postfix packages

Detailed Explanation for this Vulnerability Test

Updated postfix packages that include a security fix and two other bug
fixes are now available for Red Hat Enterprise Linux 4.

This update has been rated as having low security impact by the Red Hat
Security Response Team

Postfix is a Mail Transport Agent (MTA), supporting LDAP, SMTP AUTH (SASL),
and TLS.

A flaw was found in the ipv6 patch used with Postfix. When the file
/proc/net/if_inet6 is not available and permit_mx_backup is enabled in
smtpd_recipient_restrictions, this flaw could allow remote attackers to
bypass e-mail restrictions and perform mail relaying by sending mail to an
IPv6 hostname. The Common Vulnerabilities and Exposures project
( has assigned the name CVE-2005-0337 to this issue.

These updated packages also fix the following problems:

- wrong permissions on doc directory
- segfault when gethostbyname or gethostbyaddr fails

All users of postfix should upgrade to these updated packages, which
contain patches which resolve these issues.

Solution :
Threat Level: High

Click HERE for more information and discussions on this network vulnerability scan.


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