[ic] Strange ic behavior with png image usertag created

[David Christensen]

I’m definitely curious about the specific error from libpng.  Can you try running the equivalent UserTag code in pure perl and see what GD is complaining about?

> On Dec 13, 2017, at 10:52 AM, marco <m.mescoli at omnib.it> wrote:
> 
> Il 10/12/2017 08:44, marco ha scritto:
>> Il 10/12/2017 04:03, David Christensen ha scritto:
>>> 
>>> 
>>>> On Dec 9, 2017, at 4:05 PM, marco <m.mescoli at omnib.it
>>>> <mailto:m.mescoli at omnib.it>> wrote:
>>>> 
>>>> With Variable DEBUG 1 in main configuration file interchange.cfg all
>>>> goes well but without ic DEBUG 1 web browser give
>>>> Internal Server Error and apache error.log give this:
>>>> 
>>>> [Sat Dec 09 20:26:35.274482 2017] [http:error] [pid 680] [client
>>>> 192.168.11.2:58795] AH02429: Response header name 'libpng warning'
>>>> contains invalid characters, aborting request, referer: ...
>>>> 
>>>> ... to ic page from where i call the usetag that give the error.
>>>> 
>>>> Searching for this issue I have find this apache page:
>>>> https://blog.tigertech.net/posts/apache-cve-2016-8743/
>>>> that give responsability to malformed http header.
>>>> 
>>>> my enviro:
>>>> - Debian GNU/Linux 9
>>>> - Interchange V5.10.0
>>>> - perl 5.24.1
>>>> 
>>>> Any suggestions ?
>>>> 
>>>> P.S.
>>>> I try to attach the usertag and the complete url that give the error
>>>> but mailer bounce back the message for suspicious header
>>> 
>>> This information would be the most helpful; any way you can paste at an
>>> external site and provide a link?
>>> 
>>> Best,
>>> 
>>> David
>>> --
>>> David Christensen
>>> End Point Corporation
>>> david at endpoint.com <mailto:david at endpoint.com>
>>> 785-727-1171
> Some other tries reveal that the problem is not DEBUG global var but bound to the declaration of DebugFile in the main interchange.cfg configuration files. With commented line:
> 
> #Variable DEBUG 1
> 
> if I declare out of the the block ifdef @DEBUG this line:
> 
> DebugFile debug.log
> 
> i can display the chart pie, without or commented this declaration I obtain:
> 
> Internal Server Error
> 
> and this log from apache2 (Apache/2.4.25 (Debian)):
> [Wed Dec 13 17:31:17.115286 2017] [http:error] [pid 1054] [client 192.168.11.2:34071] AH02429: Response header name 'libpng warning' contains invalid characters, aborting request, referer: https://newweb.omnib.it/cgi-bin/elcat/stat_ass.html?giorno=13&mese=11&anno=2017&giorno2=13&mese2=12&anno2=2017&min=&max=&cod_cli=&cli_order=des_cli&cod_resp=&da_chiamata=&go.x=18&go.y=27 <https://newweb.omnib.it/cgi-bin/elcat/stat_ass.html?giorno=13&mese=11&anno=2017&giorno2=13&mese2=12&anno2=2017&min=&max=&cod_cli=&cli_order=des_cli&cod_resp=&da_chiamata=&go.x=18&go.y=27>
> 
> --
> "Fino alla bara sinpara"
> "Up to demise we rize"
> 
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--
David Christensen
End Point Corporation
david at endpoint.com
785-727-1171



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