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Red Hat Postfix IPv6 Relaying Security Issue
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Secunia Advisory:
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SA14624
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Release Date:
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2005-03-17
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Popularity:
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7,228 views
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Critical:
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Moderately critical
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Impact:
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Security Bypass
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| OS: | RedHat Enterprise Linux AS 4
RedHat Enterprise Linux ES 4
RedHat Enterprise Linux WS 4
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| CVE reference: | CVE-2005-0337
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Description:
Red Hat has issued an update for postfix. This fixes a security issue, which can be exploited by malicious people to use a vulnerable system as an open relay.
The problem is caused due to an error in the IPv6 handling when "/proc/net/if_inet6" is not available (e.g. when running in a chroot jail). This makes it possible to relay mails through the system to any MX host with an IPv6 address.
Successful exploitation requires that "permit_mx_backup" is enabled in "smtpd_recipient_restrictions".
Solution:
Updated packages are available from Red Hat Network.
http://rhn.redhat.com/
Original Advisory:
http://rhn.redhat.com/errata/RHSA-2005-152.html
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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