[asterisk-dev] [Code Review] 4374: Asterisk: For httpd server, need option to define server name for security purposes

[Ashley Sanders]

> On Jan. 29, 2015, 11:20 a.m., rmudgett wrote:
> > ./branches/13/main/http.c, lines 80-81
> > <https://reviewboard.asterisk.org/r/4374/diff/5/?file=71170#file71170line80>
> >
> >     Double this because SVN versions could get lengthy and server names can be larger as well.

Okay. I will make that adjustment. I will also increase the size of  MAX_RESPONSE_HEADER_FIELD_LENGTH to account for this. 

I also think the name shouldn't be MAX_RESPONSE_HEADER_FIELD_LENGTH, but DEFAULT_RESPONSE_HEADER_FIELD_LENGTH (considering that it gets instantiated as an ast_str and can grow on demand, thus the word 'MAX' is misleading.)


- Ashley


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On Jan. 28, 2015, 8:13 p.m., Ashley Sanders wrote:
> 
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> https://reviewboard.asterisk.org/r/4374/
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> 
> (Updated Jan. 28, 2015, 8:13 p.m.)
> 
> 
> Review request for Asterisk Developers.
> 
> 
> Bugs: ASTERISK-24316
>     https://issues.asterisk.org/jira/browse/ASTERISK-24316
> 
> 
> Repository: Asterisk
> 
> 
> Description
> -------
> 
> Currently, all responses from the Asterisk HTTP server contain a [Server] header that identifies Asterisk and its version (e.g. "Server:Asterisk/<version>", where <version> is the currently running version of Asterisk). The preferred behavior is to allow the user to configure an alternate name to use for the value returned in the [Server] header for HTTP responses (e.g. "Server:SomeSuperAwesomeServerName").
> 
> This patch provides a new configuration property, [servername], in http.conf, that gives users the ability to modify the value that Asterisk uses when identifying itself. 
> 
> By default, the new property is unused, which means that out-of-the-box, the HTTP server behaves just like it did prior to the patch. Requests to the HTTP server will generate responses with the old-style [Server] header (e.g. "Server:Asterisk/<version>", where <version> is the currently running version of Asterisk). To see the new behavior, you must add the configuration property, [servername] with some value (an empty value will work, also) to http.conf.
> 
> Whatever value the HTTP server is holding for the server name can now be seen through the httpstatus web page (http://<bindaddr>:<bindport>/<prefix>/httpstatus) (where [bindaddr], [bindport], and [prefix] are all values configured in http.conf) and the CLI command: http show status.
> 
> ***Note*** This is just the patch to the Asterisk source. You can find the review for the Testsuite at: https://reviewboard.asterisk.org/r/4377/
> 
> 
> Diffs
> -----
> 
>   ./branches/13/main/http.c 431112 
>   ./branches/13/include/asterisk/http.h 431112 
>   ./branches/13/configs/samples/http.conf.sample 431112 
> 
> Diff: https://reviewboard.asterisk.org/r/4374/diff/
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Ashley Sanders
> 
>

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