Microsoft Excel是非常流行的电子表格办公软件。 Excel在使用特制的FNGROUPCOUNT值时存在内存破坏漏洞,远程攻击者可能利用此漏洞在用户机器上执行任意指令。 如果用户受骗打开了特制的Excel文件的话就会触发这个漏洞,导致执行任意指令。 漏洞代码如下: ============================================================================== eax=0e0e0e0e ebx=0000fff1 ecx=00002241 edx=0000000f esi=00138964 edi=0013ffff eip=30093040 esp=0013794c ebp=001388e4 iopl=0 nv up ei pl nz na po nc cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010206 *** ERROR: Symbol file could not be found. Defaulted to export symbols for Excel.EXE - Excel!Ordinal41+0x93040: 30093040 f3ab rep stosd es:0013ffff=74634100 Excel!Ordinal41+0x9302e: 3009302e 5c pop esp 3009302f f3ffff rep ??? 30093032 8bd9 mov ebx,ecx 30093034 c1e902 shr ecx,0x2 30093037 8d7c1520 lea edi,[ebp+edx+0x20] 3009303b b80e0e0e0e mov eax,0xe0e0e0e 30093040 f3ab rep stosd > 0:000> g > (b98.5fc): Access violation - code c0000005 (first chance) First > chance exceptions are reported before any exception handling. > This exception may be expected and...
Microsoft Excel是非常流行的电子表格办公软件。 Excel在使用特制的FNGROUPCOUNT值时存在内存破坏漏洞,远程攻击者可能利用此漏洞在用户机器上执行任意指令。 如果用户受骗打开了特制的Excel文件的话就会触发这个漏洞,导致执行任意指令。 漏洞代码如下: ============================================================================== eax=0e0e0e0e ebx=0000fff1 ecx=00002241 edx=0000000f esi=00138964 edi=0013ffff eip=30093040 esp=0013794c ebp=001388e4 iopl=0 nv up ei pl nz na po nc cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010206 *** ERROR: Symbol file could not be found. Defaulted to export symbols for Excel.EXE - Excel!Ordinal41+0x93040: 30093040 f3ab rep stosd es:0013ffff=74634100 Excel!Ordinal41+0x9302e: 3009302e 5c pop esp 3009302f f3ffff rep ??? 30093032 8bd9 mov ebx,ecx 30093034 c1e902 shr ecx,0x2 30093037 8d7c1520 lea edi,[ebp+edx+0x20] 3009303b b80e0e0e0e mov eax,0xe0e0e0e 30093040 f3ab rep stosd > 0:000> g > (b98.5fc): Access violation - code c0000005 (first chance) First > chance exceptions are reported before any exception handling. > This exception may be expected and handled. > eax=00000000 ebx=00000000 ecx=0e0e0e0e edx=7c9037d8 esi=00000000 > edi=00000000 > eip=0e0e0e0e esp=0013757c ebp=0013759c iopl=0 nv up ei pl zr na > po nc > cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 > efl=00010246 > 0e0e0e0e ?? ??? ==============================================================================