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Re: nginx 0day exploit for nginx + fastcgi PHP

Ian Evans
May 21, 2010 04:58PM
On Fri, May 21, 2010 4:39 pm, Igor Sysoev wrote:
> On Fri, May 21, 2010 at 03:04:18PM -0400, Ian M. Evans wrote:
>
>> On 5/21/2010 2:36 PM, Igor Sysoev wrote:
>> > On Fri, May 21, 2010 at 02:26:31PM -0400, Ian Evans wrote:
>> >
>> >> Is this situation only pertaining to sites that allow uploads from
>> forms?
>> >>
>> >> Going way back to this thread
>> >> (http://www.ruby-forum.com/topic/145358#645652) in '08, I needed
>> >> cgi.fix-pathinfo=1 to fix problems with paths and specific
>> extensionless
>> >> files I needed run as php.
>> >>
>> >> Changing cgi.fix-pathinfo=1 to 0 broke a lot of stuff.
>> >
>> > Could you show again how URIs should be mapped to SCRIPT_FILENAME
>> > and PATH_INFO ? Modern nginx versions support named captures in regex.
>> >
>> >
>>
>> This is what you came up with in the thread back in '08:
>>
>> location ~ ^/(cr|news|poll|posters|photos|profile|review)(/|$) {
>> root /usr/local/apache/htdocs;
>> set $script_name $uri;
>> set $path_info "";
>>
>> if ($uri ~ ^(/[^/]+)(/.*)) {
>> set $script_name $1;
>> set $path_info $2;
>> fastcgi_pass 127.0.0.1:10004;
>> }
>> ...
>> fastcgi_param SCRIPT_FILENAME $document_root$script_name;
>> fastcgi_param PATH_INFO $path_info;
>> }
>> location ~ /(cr|news|poll|posters|photos|profile|review)(/|$) {
>> root /usr/local/apache/htdocs;
>> set $script_name $uri;
>> set $path_info "";
>> if ($uri ~
>> ^(.*/(?:cr|news|poll|posters|photos|profile|review))(/.*)) {
>> set $script_name $1;
>> set $path_info $2;
>> fastcgi_pass 127.0.0.1:10004;
>> }
>> ...
>> fastcgi_param SCRIPT_FILENAME $document_root$script_name;
>> fastcgi_param PATH_INFO $path_info;
>> fastcgi_pass 127.0.0.1:10004;
>> }
>>
>> The two variations were needed to handle when the extensionless php
>> script file was in the root (example.com/NEWS/2006/1/24) or several
>> subdirs down (example.com/tiff/2007/1/PHOTOS/16)
>
> location ~
> ^/(?<SN>cr|news|poll|posters|photos|profile|review)(?<PI>/.*$|$) {
> root /usr/local/apache/htdocs;
> fastcgi_pass 127.0.0.1:10004;
> fastcgi_param SCRIPT_FILENAME $document_root/$SN;
> fastcgi_param PATH_INFO $PI;
> }
>
> location ~
> ^(?<SN>.*/(cr|news|poll|posters|photos|profile|review)(?<PI>/.*$|$) {
> root /usr/local/apache/htdocs;
> fastcgi_pass 127.0.0.1:10004;
> fastcgi_param SCRIPT_FILENAME $document_root$SN;
> fastcgi_param PATH_INFO $PI;
> }
>

And this will work with cgi.fix-pathinfo=0? Just want to confirm since I
only have my production server to test on. Guess I really need to dig out
an old computer one day and just set it up as a local test server.

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Subject Author Posted

nginx 0day exploit for nginx + fastcgi PHP

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Re: nginx 0day exploit for nginx + fastcgi PHP

Igor Sysoev May 21, 2010 01:36PM

Re: nginx 0day exploit for nginx + fastcgi PHP

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Re: nginx 0day exploit for nginx + fastcgi PHP

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Re: nginx 0day exploit for nginx + fastcgi PHP

Igor Sysoev May 21, 2010 02:16PM

Re: nginx 0day exploit for nginx + fastcgi PHP

Ian Evans May 21, 2010 02:30PM

Re: nginx 0day exploit for nginx + fastcgi PHP

mike May 21, 2010 02:40PM

Re: nginx 0day exploit for nginx + fastcgi PHP

Igor Sysoev May 21, 2010 02:40PM

Re: nginx 0day exploit for nginx + fastcgi PHP

Ian M. Evans May 21, 2010 03:10PM

Re: nginx 0day exploit for nginx + fastcgi PHP

Igor Sysoev May 21, 2010 04:46PM

Re: nginx 0day exploit for nginx + fastcgi PHP

Ian Evans May 21, 2010 04:58PM

Re: nginx 0day exploit for nginx + fastcgi PHP

Igor Sysoev May 21, 2010 05:20PM

Re: nginx 0day exploit for nginx + fastcgi PHP

Ian Evans May 21, 2010 05:54PM

Re: nginx 0day exploit for nginx + fastcgi PHP

Igor Sysoev May 22, 2010 02:10AM

Re: nginx 0day exploit for nginx + fastcgi PHP

Ian M. Evans May 22, 2010 01:28AM

Re: nginx 0day exploit for nginx + fastcgi PHP

Igor Sysoev May 22, 2010 01:32AM

Re: nginx 0day exploit for nginx + fastcgi PHP

Ian Evans May 22, 2010 03:00AM

Re: nginx 0day exploit for nginx + fastcgi PHP

Igor Sysoev May 22, 2010 03:58AM

Re: nginx 0day exploit for nginx + fastcgi PHP

Ian M. Evans May 22, 2010 05:46AM

Re: nginx 0day exploit for nginx + fastcgi PHP

Igor Sysoev May 22, 2010 06:12AM

Re: nginx 0day exploit for nginx + fastcgi PHP

Ian M. Evans May 22, 2010 06:22AM

Re: nginx 0day exploit for nginx + fastcgi PHP

Igor Sysoev May 22, 2010 06:26AM

Re: nginx 0day exploit for nginx + fastcgi PHP

Ian M. Evans May 22, 2010 06:56AM

Re: nginx 0day exploit for nginx + fastcgi PHP

Ian M. Evans May 22, 2010 08:22AM

Re: nginx 0day exploit for nginx + fastcgi PHP

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Re: nginx 0day exploit for nginx + fastcgi PHP

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Re: nginx 0day exploit for nginx + fastcgi PHP

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Re: nginx 0day exploit for nginx + fastcgi PHP

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Re: nginx 0day exploit for nginx + fastcgi PHP

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Re: nginx 0day exploit for nginx + fastcgi PHP

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Re: nginx 0day exploit for nginx + fastcgi PHP

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Re: nginx 0day exploit for nginx + fastcgi PHP

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Re: nginx 0day exploit for nginx + fastcgi PHP

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Re: nginx 0day exploit for nginx + fastcgi PHP

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Re: nginx 0day exploit for nginx + fastcgi PHP

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Re: nginx 0day exploit for nginx + fastcgi PHP

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Re: nginx 0day exploit for nginx + fastcgi PHP

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Re: nginx 0day exploit for nginx + fastcgi PHP

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