Re: .htr bug still exist after applying MS patches.

[Maher Odeh <rax () NETVISION NET IL>]

how about removing the .htr extentions and saving yourself alot
of trouble ?





  Maher Odeh
  NetVision Security Team
  Cell Phone : 050 936 107
  On-Line Transcript : http://www.brainbench.com/transcript.jsp?pid=710078


-----Original Message-----
From: System1 [mailto:System () tiemiddleeast com]
Sent: Tuesday, January 30, 2001 2:15 PM
To: VULN-DEV () SECURITYFOCUS COM
Subject: .htr bug still exist after applying MS patches.


hi,
MS01-004 is out.

I sent few days ago this letter to microsoft:

-----Original Message-----
From: Moran [mailto:Moran () TIEMIDDLEEAST com]
Sent: Saturday, January 20, 2001 4:55 PM
To: secure () microsoft com
Subject: .htr bug still exist after applying MS patches.



Hi,
I have server running win2000 adv. server with IIS 5.

I have applied all relevant MS patches.

after I did it I checked for security problems and did as follow:

https://mysite/checkuser.asp <https://mysite/checkuser.asp>

(the asp making a check with the SQL server for user name and password
and i get error of unknown login ID. thats fine.)

BUT when I did:
https://mysite/checkuser.asp%3F+.htr
<https://mysite/checkuser.asp%3F+.htr>

I get blank page and when I view the source I get this line:

<!--#include file="Conn.asp"-->

so attacker now can know in which file my DSN details are located.

what im worried about is that attacker can imporve this method to show
the full asp file source.

notice that I added all MS patches and I can still do it.

is there any specific patch to prevent this ?

please let me know ASAP.

thanks,

Moran Zavdi
Systems Administrator
TIE Middle East Ltd.
Phone: (972)-9-9501113
mailto:moran () tiemiddleeast com <mailto:moran () tiemiddleeast com>