Postfix MTA has been updated with a new patch to correct some errors security level of impact medium.
These vulnerabilities were corrected includes checking the owner's mailbox incorrect or mail directory of the user. In certain configurations vulnerability lets you add data

All users should upgrade to postfix these packages.

As I upgrade Postfix on Linux Debian / Ubuntu

First update the database repository, and then install the package Postfix corrected: 


  deathbian: ~ # apt-get update 
  deathbian: ~ # apt-get upgrade


As I upgrade Postfix on Linux RHEL / CentOS Linux

Under RHEL / CentOS 5.x, type the following command: 


  [root @ redhat ~] # yum update



Under RHEL <= 4.x, we use this command: 


  [root @ redhat ~] # up2date-u


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