mod_rewrite/6990: Improper handling (mishandling?) of the \n when passing key to external RewriteMap program

[Andrey Ryazanov <sg...@di-net.ru>]

>Number:         6990
>Category:       mod_rewrite
>Synopsis:       Improper handling (mishandling?) of the \n when passing key to external RewriteMap program
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    apache
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          change-request
>Submitter-Id:   apache
>Arrival-Date:   Sun Dec 17 10:10:00 PST 2000
>Closed-Date:
>Last-Modified:
>Originator:     sg@di-net.ru
>Release:        1.3.14
>Organization:
apache
>Environment:
FreeBSD 4.1.1-STABLE
>Description:
If the key string contains \n, the external program will treat this like two
different requests, and all following requests will get incorrect replies.
>How-To-Repeat:
RewriteMap prg:/the_prog.pl (see below)
RewriteRule ^(.+)$    ${prg:$1}

Now fetch http://servername/test%0aboom.lala, and take a look at /tmp/the_prog.log. You'll get something like
request:/test reply:/test0
request:boom.lala reply:boom.lala1

If you perform one more request (ex. http://servername/nexttest), you'll get
request:/nexttest reply:/nexttest2 <-- this must be '1' !!!

the_prog.pl is here:
#!/usr/bin/perl
$|=1;
$i=0;
open(LOG,">>/tmp/the_prog.log");
while (<STDIN>) {
print LOG "request:$_ reply:$_$i\n";
print "$_$i\n";
$i++;
}
close(LOG);
>Fix:
Don't see any way, but hard checking of the passed key string.
>Release-Note:
>Audit-Trail:
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