Possible To Block HTTP/1.0 Requests?

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Possible To Block HTTP/1.0 Requests?

L2 Linker

Can't seem to find a way to do it. I don't see a built-in signature, and was going to make a custom one, but the patern match context doesn't seem to cover the HTTP version for some odd reason. Maybe I'm missing something?


L2 Linker
Can you put in a screen shot of the packet capture you want to make it based off of?

L2 Linker

Although the custom signature document indicates the "http-req-headers" context excludes the ablity to match on the method/path/version/host info, I have found that you can at least match on the method and version info using this context.


I haven't tried to match path/host info, however, as there are specific contexts available for those headers.


The attached vulnerability sig XML looks for v1.1 in a GET method, it would be easy enough to modify it to look for 1.0.



<vulnerability-threat version="7.1.0">
  <entry name="41002">
        <entry name="sig-http-ver">
            <entry name="And Condition 1">
                <entry name="Or Condition 1">
                        <entry name="http-method">
                      <pattern>\x48 54 54 50 2f 31 2e 31\x</pattern>
          <comment>looks for http version 1.1 in header</comment>
    <comment>http 1.1</comment>


Thanks! I'll give this a try!

  • 3 replies
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