sqlmap/xml/banner/postgresql.xml

<?xml version="1.0" encoding="UTF-8"?>

<root>
    <regexp value="PostgreSQL\s+([\w\.]+)">
        <info dbms_version="1"/>
    </regexp>

    <!-- Ubuntu -->
    <regexp value="PostgreSQL\s+(8\.2\.7)\s+on\s+.*?\s+\(Ubuntu 4\.2\.3-2ubuntu4\)">
        <info dbms_version="1" type="Linux" distrib="Ubuntu" release="8.04" codename="Hardy Heron"/>
    </regexp>

    <regexp value="PostgreSQL\s+(8\.3\.5)\s+on\s+.*?\s+\(Ubuntu 4\.3\.2-1ubuntu11\)">
        <info dbms_version="1" type="Linux" distrib="Ubuntu" release="8.10" codename="Intrepid Ibex"/>
    </regexp>
</root>