安全研究
安全漏洞
Microsoft Excel畸形FNGROUPCOUNT记录远程代码执行漏洞(MS06-037)
发布日期:2006-07-11
更新日期:2006-07-13
受影响系统:
Microsoft Excel Viewer 2003描述:
Microsoft Excel v.X for Mac
Microsoft Excel 2004 for Mac
Microsoft Excel 2003
Microsoft Excel 2002
Microsoft Excel 2000
BUGTRAQ ID: 18890
CVE(CAN) ID: CVE-2006-1308
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 ?? ???
==============================================================================
<*来源:Xin Ouyang (xouyang@fortinet.com)
链接:http://marc.theaimsgroup.com/?l=full-disclosure&m=115267392011459&w=2
http://www.microsoft.com/technet/security/Bulletin/MS06-037.mspx
http://www.us-cert.gov/cas/techalerts/TA06-192A.html
*>
建议:
临时解决方法:
* 不要打开或保存不可信任来源接收到的Excel文件。
厂商补丁:
Microsoft
---------
Microsoft已经为此发布了一个安全公告(MS06-037)以及相应补丁:
MS06-037:Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (917285)
链接:http://www.microsoft.com/technet/security/Bulletin/MS06-037.mspx
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