sql注入數(shù)據(jù)庫修復(fù)的兩種實(shí)例方法
發(fā)布日期：2021-12-31 17:21 | 文章來源：腳本之家
1.第一種情況是 需要將指定的 注入字符串全部替換掉（僅替換注入的字符串為空）
復(fù)制代碼 代碼如下:
declare @delStr nvarchar(500)
set @delStr='<script src=https://www.jb51.net/js/common.js></script>' --這里被注入的字段串
/****************************************/
/**********以下為操作實(shí)體************/
set nocount on
declare @tableName nvarchar(100),@columnName nvarchar(100),@tbID int,@iRow int,@iResult int
declare @sql nvarchar(2000)
set @iResult=0
declare cur cursor for
select name,id from sysobjects where xtype='U'
open cur
fetch next from cur into @tableName,@tbID
while @@fetch_status=0
begin
declare cur1 cursor for
select name from syscolumns where xtype in (231,167,239,175, 35, 99) and id=@tbID
open cur1
fetch next from cur1 into @columnName
while @@fetch_status=0
begin
set @sql='update [' + @tableName + '] set ['+ @columnName +']= SUBSTRING([' + @columnName + '],' + '1, PATINDEX( ''%' + @delStr + '%'', [' + @columnName + '])-1) + ' + 'SUBSTRING([' + @columnName + '], PATINDEX( ''%' + @delStr + '%'', [' + @columnName + ']) + ' + 'len(''' + @delStr + ''') , datalength([' + @columnName + '])) where ['+@columnName+'] like ''%'+@delStr+'%'''
exec sp_executesql @sql
set @iRow=@@rowcount
set @iResult=@iResult+@iRow
if @iRow>0
begin
print '表：'+@tableName+',列:'+@columnName+'被更新'+convert(varchar(10),@iRow)+'條記錄;'
end
fetch next from cur1 into @columnName end
close cur1
deallocate cur1
fetch next from cur into @tableName,@tbID
end
print '數(shù)據(jù)庫教程共有'+convert(varchar(10),@iResult)+'條記錄被更新!!!'
close cur
deallocate cur
set nocount off
2.第二種是 需要將注入到表中起始位置到最后都刪掉。（此種方法直接找到注入的起始位置，后面的全部刪掉）
復(fù)制代碼 代碼如下:
--恢復(fù)被注入數(shù)據(jù)庫
--2013-09-26
declare @delStr nvarchar(500)
set @delStr='</title><style>.' --被注入的字段串的開始采樣，從此位置后面的數(shù)據(jù)都為注入數(shù)據(jù) /**********以下為操作實(shí)體************/
set nocount on
declare @tableName nvarchar(100),@columnName nvarchar(100),@tbID int,@iRow int,@iResult int
declare @sql nvarchar(2000)
set @iResult=0
declare cur cursor for
select name,id from sysobjects where xtype='U'
open cur
fetch next from cur into @tableName,@tbID
while @@fetch_status=0
begin
declare cur1 cursor for
select name from syscolumns where xtype in (231,167,239,175, 35, 99) and id=@tbID
open cur1
fetch next from cur1 into @columnName
while @@fetch_status=0
begin
set @sql='update [' + @tableName + '] set ['+ @columnName +']=
SUBSTRING([' + @columnName + '],1, PATINDEX( ''%' + @delStr + '%'', [' + @columnName + '])-1) where ['+@columnName+'] like ''%'+@delStr+'%'''
exec sp_executesql @sql
set @iRow=@@rowcount
set @iResult=@iResult+@iRow
if @iRow>0
begin
print '表：'+@tableName+',列:'+@columnName+'被更新'+convert(varchar(10),@iRow)+'條記錄;'
end
fetch next from cur1 into @columnName end
close cur1
deallocate cur1
fetch next from cur into @tableName,@tbID
end
print '數(shù)據(jù)庫教程共有'+convert(varchar(10),@iResult)+'條記錄被更新!!!'
close cur
deallocate cur
set nocount off
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