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    <title>Transition Technology: Ticket #921: HTTP_PROXY env var vulnerability</title>
    <link>http://localhost:8080/trac/ticket/921</link>
    <description>&lt;p&gt;
See &lt;a class="ext-link" href="https://httpoxy.org/"&gt;&lt;span class="icon"&gt;​&lt;/span&gt;https://httpoxy.org/&lt;/a&gt;
&lt;/p&gt;
</description>
    <language>en-us</language>
    <image>
      <title>Transition Technology</title>
      <url>/trac/chrome/site/TransitionNetwork-Logo-Web-Small.jpg</url>
      <link>http://localhost:8080/trac/ticket/921</link>
    </image>
    <generator>Trac 0.12.5</generator>
    <item>
      
        <dc:creator>chris</dc:creator>

      <pubDate>Tue, 19 Jul 2016 12:56:29 GMT</pubDate>
      <title>hours, totalhours changed</title>
      <link>http://localhost:8080/trac/ticket/921#comment:1</link>
      <guid isPermaLink="false">http://localhost:8080/trac/ticket/921#comment:1</guid>
      <description>
          &lt;ul&gt;
            &lt;li&gt;&lt;strong&gt;hours&lt;/strong&gt;
                changed from &lt;em&gt;0.0&lt;/em&gt; to &lt;em&gt;0.4&lt;/em&gt;
            &lt;/li&gt;
            &lt;li&gt;&lt;strong&gt;totalhours&lt;/strong&gt;
                changed from &lt;em&gt;0.0&lt;/em&gt; to &lt;em&gt;0.4&lt;/em&gt;
            &lt;/li&gt;
          &lt;/ul&gt;
        &lt;p&gt;
This vulnerability can be tested with using the Firefox &lt;a class="ext-link" href="http://www.garethhunt.com/modifyheaders/"&gt;&lt;span class="icon"&gt;​&lt;/span&gt;Modify Headers&lt;/a&gt; and &lt;a class="ext-link" href="http://livehttpheaders.mozdev.org/"&gt;&lt;span class="icon"&gt;​&lt;/span&gt;livehttpheaders&lt;/a&gt; add ons.
&lt;/p&gt;
&lt;p&gt;
I assume it isn't worth fixing &lt;a class="wiki" href="http://localhost:8080/trac/wiki/PuffinServer"&gt;PuffinServer&lt;/a&gt; as this is probably due to be switched off as the site has been migrated off it?
&lt;/p&gt;
&lt;p&gt;
On &lt;a class="wiki" href="http://localhost:8080/trac/wiki/PenguinServer"&gt;PenguinServer&lt;/a&gt;, this needs adding to all ngnix config for php:
&lt;/p&gt;
&lt;pre class="wiki"&gt;fastcgi_param HTTP_PROXY "";
&lt;/pre&gt;&lt;p&gt;
And for Trac:
&lt;/p&gt;
&lt;pre class="wiki"&gt;proxy_set_header Proxy "";
&lt;/pre&gt;&lt;p&gt;
And testing via &lt;a class="ext-link" href="https://penguin.transitionnetwork.org/info/php-info.php"&gt;&lt;span class="icon"&gt;​&lt;/span&gt;https://penguin.transitionnetwork.org/info/php-info.php&lt;/a&gt; and all is good.
&lt;/p&gt;
&lt;p&gt;
On &lt;a class="wiki" href="http://localhost:8080/trac/wiki/ParrotServer"&gt;ParrotServer&lt;/a&gt; the vulnerability was tested and was present so the following was added to &lt;tt&gt;/etc/apache2/apache2.conf&lt;/tt&gt;:
&lt;/p&gt;
&lt;pre class="wiki"&gt;RequestHeader unset Proxy early
&lt;/pre&gt;&lt;p&gt;
And that fixed it.
&lt;/p&gt;
      </description>
      <category>Ticket</category>
    </item><item>
      
        <dc:creator>chris</dc:creator>

      <pubDate>Tue, 19 Jul 2016 13:12:55 GMT</pubDate>
      <title>status changed; resolution set</title>
      <link>http://localhost:8080/trac/ticket/921#comment:2</link>
      <guid isPermaLink="false">http://localhost:8080/trac/ticket/921#comment:2</guid>
      <description>
          &lt;ul&gt;
            &lt;li&gt;&lt;strong&gt;status&lt;/strong&gt;
                changed from &lt;em&gt;new&lt;/em&gt; to &lt;em&gt;closed&lt;/em&gt;
            &lt;/li&gt;
            &lt;li&gt;&lt;strong&gt;resolution&lt;/strong&gt;
                set to &lt;em&gt;fixed&lt;/em&gt;
            &lt;/li&gt;
          &lt;/ul&gt;
      </description>
      <category>Ticket</category>
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