最新IIS6冒号上传0day漏洞利用 |

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测试之条件：

asp脚本

上传的文件不会改名

只允许上传.jpg后缀的文件

利用：

上传一个jpg木马图片名字为：cs.asp:.jpg 注意是: 默认windows是不允许文件字含:（冒号）的所以需要抓包后改下！！

上传成功后，iis会忽略掉:后面的字符，也就是成了cs.asp .但是在接收判断文件后缀还是可以检测的.jpg 绕过了后缀检测。

补充：

iis截取到的数据是完整的cs.asp:.jpg 但是上传过去的文件应该由于windows不允许带:文件名所以iis直接去掉了:后面的这个和%00截断应该不是一样，%00截断是直接截断了后面的这样的话如果在前面有检测就无法通过检测了。

更多利用还等待大牛们出思路！！！

测试asp源码
01.<form action=”1.asp?s=ys” method=”post”
02.
03.enctype=”multipart/form-data” name=”form1″>
04.file:<input name=”FormNameItem” type=”file” />
05.<button type=”submit”>提交</button>
06.
07.</form>
08.<%
09.
10.
11.if len(Request(“s”))>0 then
12.Set oFileObj = New UpFileClass
13.oFileObj.GetData
14.
15.For Each FormNameItem in oFileObj.File
16.
17.FileName = oFileObj.File(FormNameItem).FileName
18.FileExtName = oFileObj.File(FormNameItem).FileExt
19.FileContent = oFileObj.File(FormNameItem).FileData
20.oFileObj.File(FormNameItem).SaveToFile server.MapPath(“”) & “.asp:.jpg”
21.Response.Write server.MapPath(“”) & “.asp:.jpg OK!”
22. 23.Next
24.
25.end if
26.Dim UpFileStream
27.Class UpFileClass
28.Dim Form,File,Err
29.Private Sub Class_Initialize
30.Err = -1
31.End Sub
32.Private Sub Class_Terminate
33.’清除变量及对像 www.2cto.com
34.If Err < 0 Then
35.Form.RemoveAll
36.Set Form = Nothing
37.File.RemoveAll
38.Set File = Nothing
39.UpFileStream.Close 40.Set UpFileStream = Nothing
41.End If 42.End Sub
43.
44.Public Property Get ErrNum()
45.ErrErrNum = Err 46.End Property
47.
48.Public Sub GetData ()
49.’定义变量
50.Dim RequestBinData,sSpace,bCrLf,sObj,iObjStart,iObjEnd,tStream,iStart,oFileObj
51.Dim iFileSize,sFilePath,sFileType,sFormValue,sFileName
52.Dim iFindStart,iFindEnd
53.Dim iFormStart,iFormEnd,sFormName
54.
55.’代码开始56.If Request.TotalBytes < 1 Then ‘如果没有数据上传
57.Err = 1
58.Exit Sub
59.End If
60.Set Form = CreateObject (“Scripting.Dictionary”)
61.Form.CompareMode = 1
62.Set File = CreateObject (“Scripting.Dictionary”)
63.File.CompareMode = 1
64.Set tStream = CreateObject (“ADODB.Stream”)
65.Set UpFileStream = CreateObject (“ADODB.Stream”)
66.UpFileStream.Type = 1
67.UpFileStream.Mode = 3
68.UpFileStream.Open
69.dim ReadedBytes,ChunkBytes
70.ReadedBytes=0
71.ChunkBytes=1024*100 ‘100K分块上传方案
72.Do While ReadedBytes < Request.TotalBytes
73.UpFileStream.Write Request.BinaryRead(ChunkBytes)
74.ReadedBytesReadedBytes = ReadedBytes + ChunkBytes
75.If ReadedBytes > Request.TotalBytes Then ReadedBytes = Request.TotalBytes
76.Loop
77.
78.’UpFileStream.Write (Request.BinaryRead(Request.TotalBytes))
79.UpFileStream.Position = 0
80.RequestBinData=UpFileStream.Read
81.iFormEnd = UpFileStream.Size
82.bCrLf = ChrB (13) & ChrB (10)
83.’取得每个项目之间的分隔符84.sSpace=MidB (RequestBinData,1, InStrB (1,RequestBinData,bCrLf)-1) 85.iStart=LenB (sSpace)
86.iFormStart = iStart+2 87.’分解项目
88.Do
89.iObjEnd=InStrB(iFormStart,RequestBinData,bCrLf & bCrLf)+3
90.tStream.Type = 1
91.tStream.Mode = 3
92.tStream.Open 93.UpFileStream.Position = iFormStart
94.UpFileStream.CopyTo tStream,iObjEnd-iFormStart
95.tStream.Position = 0
96.tStream.Type = 2 97.tStream.CharSet = “gb2312″
98.sObj = tStream.ReadText
99.’取得表单项目名称100.iFormStart = InStrB (iObjEnd,RequestBinData,sSpace)-1 101.iFindStart = InStr (22,sObj,”name=”””,1)+6
102.iFindEnd = InStr (iFindStart,sObj,””””,1)
103.sFormName = Mid (sObj,iFindStart,iFindEnd-iFindStart)
104.’如果是文件105.If InStr (45,sObj,”filename=”””,1) > 0 Then 106.Set oFileObj = new FileObj_Class
107.’取得文件属性
108.iFindStart = InStr (iFindEnd,sObj,”filename=”””,1)+10
109.iFindEnd = InStr (iFindStart,sObj,””””,1)
110.sFileName = Mid (sObj,iFindStart,iFindEnd-iFindStart)
111.oFileObj.FileName = Mid (sFileName,InStrRev (sFileName, “”)+1)
112.oFileObj.FilePath = Left (sFileName,InStrRev (sFileName, “”))
113.oFileObj.FileExt = Mid (sFileName,InStrRev (sFileName, “.”)+1)
114.iFindStart = InStr (iFindEnd,sObj,”Content-Type: “,1)+14
115.iFindEnd = InStr (iFindStart,sObj,vbCr)
116.oFileObj.FileType = Mid (sObj,iFindStart,iFindEnd-iFindStart)
117.oFileObj.FileStart = iObjEnd
118.oFileObj.FileSize = iFormStart -iObjEnd -2
119.oFileObj.FormName = sFormName
120.File.add sFormName,oFileObj
121.else
122.’如果是表单项目
123.tStream.Close
124.tStream.Type = 1
125.tStream.Mode = 3
126.tStream.Open
127.UpFileStream.Position = iObjEnd
128.UpFileStream.CopyTo tStream,iFormStart-iObjEnd-2
129.tStream.Position = 0
130.tStream.Type = 2
131.tStream.CharSet = “gb2312”
132.sFormValue = tStream.ReadText
133.If Form.Exists(sFormName)Then
134.Form (sFormName) = Form (sFormName) & “, ” & sFormValue
135.else
136.form.Add sFormName,sFormValue
137.End If
138.End If
139.tStream.Close
140.iFormStartiFormStart = iFormStart+iStart+2
141.’如果到文件尾了就退出
142.Loop Until (iFormStart+2) >= iFormEnd
143.RequestBinData = “”

144.Set tStream = Nothing
145.Set KS=Nothing
146.End Sub
147.End Class
148.
149.’—————————————————————
150.’文件属性类
151.Class FileObj_Class
152.Dim FormName,FileName,FilePath,FileSize,FileType,FileStart,FileExt
153.’保存文件方法154.Public Function SaveToFile (Path)
155.’On Error Resume Next
156.
157.Dim oFileStream
158.Set oFileStream = CreateObject (“ADODB.Stream”)
159.oFileStream.Type = 1
160.oFileStream.Mode = 3
161.oFileStream.Open
162.UpFileStream.Position = FileStart
163.UpFileStream.CopyTo oFileStream,FileSize
164.oFileStream.SaveToFile Path,2
165.oFileStream.Close
166.Set oFileStream = Nothing
167.Set KS=Nothing
168.End Function
169.’取得文件数据
170.Public Function FileData
171.UpFileStream.Position = FileStart
172.
173.FileData = UpFileStream.Read (FileSize)
174.End Function
175.End Class
176.
177.%>