Ubuntu 4.10 : postfix vulnerability (USN-74-1)

high Nessus Plugin ID 20695

Synopsis

The remote Ubuntu host is missing one or more security-related patches.

Description

Jean-Samuel Reynaud noticed a programming error in the IPv6 handling code of Postfix when /proc/net/if_inet6 is not available (which is the case in Ubuntu since Postfix runs in a chroot). If 'permit_mx_backup' was enabled in the 'smtpd_recipient_restrictions', Postfix turned into an open relay, i. e. erroneously permitted the delivery of arbitrary mail to any MX host which has an IPv6 address.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 20695

File Name: ubuntu_USN-74-1.nasl

Version: 1.14

Type: local

Agent: unix

Published: 1/15/2006

Updated: 1/19/2021

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:postfix, p-cpe:/a:canonical:ubuntu_linux:postfix-dev, p-cpe:/a:canonical:ubuntu_linux:postfix-doc, p-cpe:/a:canonical:ubuntu_linux:postfix-ldap, p-cpe:/a:canonical:ubuntu_linux:postfix-mysql, p-cpe:/a:canonical:ubuntu_linux:postfix-pcre, p-cpe:/a:canonical:ubuntu_linux:postfix-pgsql, p-cpe:/a:canonical:ubuntu_linux:postfix-tls, cpe:/o:canonical:ubuntu_linux:4.10

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Patch Publication Date: 2/4/2005

Reference Information

USN: 74-1