[Full-disclosure] Adobe Flash CS3 Professional FLA File Parsing Multiple Local Code Execute Vulnerabilities

Adobe Flash CS3 Professional FLA File Parsing Multiple Local Code
Execute Vulnerabilities

by cocoruder([email protected])
http://ruder.cdut.net

Summary:

More than three local code execute vulnerabilities exist in Adobe

Flash CS3 Professional while it is parsing FLA files. An attacker who
successfully exploit these vulnerabilities can run arbitrary code on
the affected system.

Affected Software Versions:

Adobe Flash CS3 Professional 9.0
Macromedia Flash MX 2004

Details:

All these vulnerabilities are due to the parser does not handle

the malformed FLA file accurately, by changing value of some special
addresses in normal FLA file, it can result in some unexpected errors
at "call" instruction, the following is one of the situations:

    eax=00000000 ebx=00000000 ecx=41414141 edx=00000000 esi=08feac38 edi=0012eb2c
    eip=00943502 esp=0012e15c ebp=08feac3c iopl=0         nv up ei pl nz na pe nc
    cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00250206
    *** ERROR: Symbol file could not be found.  Defaulted to export

symbols for Flash-unprepped.exe -
Flash_unprepped!std::basic_istream<char,std::char_traits<char>
>::basic_istream<char,std::char_traits<char> >+0x3d7762:
00943502 8b01 mov eax,dword ptr
[ecx] ds:0023:41414141=???, can be controlled
00943504 8b10 mov edx,dword ptr [eax]
00943506 6a01 push 1
00943508 ffd2 call edx ; code executing is possible
0094350a 8bbe48020000 mov edi,dword ptr [esi+248h]
00943510 3bfb cmp edi,ebx
00943512 899ef4010000 mov dword ptr [esi+1F4h],ebx
00943518 7410 je
Flash_unprepped!std::basic_istream<char,std::char_traits<char>
>::basic_istream<char,std::char_traits<char> >+0x3d778a (0094352a)

It is confirmed that at least one of them can be written

successful working exploits for, on the other hand, because the FLA
file can not be loaded remotely, which can reduce the threat of these
vulnerabilities.

Vendor Response:

Adobe has replied me that they will fix these vulnerabilities in

the next major release of Flash Professional, we suggest all of the
Adobe Flash CS3 Professional users do not open the FLA file which are
from distrustful source.

An advisory from the vendor can be found at:

http://www.adobe.com/support/security/advisories/apsa08-03.html

Fortinet advisory can be found at:

http://www.fortiguardcenter.com/advisory/FGA-2008-07.html

CVE Information:

CVE-2008-1201

Disclosure Timeline:

2007.11.09          Vendor notified via email
2007.11.10          Vendor responded
2007.11.16          Vendor replied they can not find a way to exploit
2007.11.16          Send some notes to the vendor
2007.11.27          Vendor replied they still can not find a way to exploit
2007.11.28          Send an working exploit to the vendor
2008.03.11          Vendor replied there will not be a plan for developing

an update due to the threat of the vul, they will fix it via the next
major release.
2008.03.20 Coordinated vulnerability disclosure

–EOF–

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