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Ubuntu Postfix IPv6 Relaying Security Issue
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Secunia Advisory:
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SA14137
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Release Date:
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2005-02-04
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Last Update:
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2005-03-17
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Popularity:
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10,459 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: | Ubuntu Linux 4.10
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Secunia CVSS-2 Score:
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| Advisory Content (Page 1 of 3) | [ 1 ] [ 2 ] [ 3 ] | |
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Description:
Ubuntu 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".
Change Page:
[ 1 ] [ 2 ] [ 3 ]
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