bugtraq - CJWSoft ASPGuest GuestBook 'edit.asp'

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Message-Id: <201202231704.q1NH4qaQ031987@sf01web1.securityfocus.com>
Date: Thu, 23 Feb 2012 17:04:52 GMT
From: demonalex@....com
To: bugtraq@...urityfocus.com
Subject: CJWSoft ASPGuest GuestBook 'edit.asp' - SQL Injection Vulnerability

Title: CJWSoft ASPGuest GuestBook 'edit.asp' - SQL Injection Vulnerability

Product : CJWSoft ASPGuest GuestBook

Version : Free Version

Vendor: http://www.cjwsoft.com/aspguest/default.asp

Class:  Input Validation Error  

CVE:

Remote:  Yes  

Local:  No  

Published:  2012-02-24

Updated:  

Impact : Medium (CVSSv2 Base : 7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P)

Bug Description :
Page 'edit.asp' of CJWSoft ASPGuest GuestBook(Free Version) is vulnerable with Security Access Control Bypass and SQL Injection Vulnerability.

POC:
#-------------------------------------------------------------
1) Security Access Control Bypass
Page 'edit.asp' is a page for editing message as administrator privilege, but it can be viewed without authentication by everyone.

2) SQL Injection
http://victim/guestbook/admin/edit.asp?ID=8 and 1=1
http://victim/guestbook/admin/edit.asp?ID=8 and 1=2
etc...
#-------------------------------------------------------------

Advice:
1) Add 'Session()' for authentication into 'edit.asp'.
2) Use 'cint()' for converting type of ID into 'edit.asp'.

Credits : This vulnerability was discovered by demonalex@....com
mail: demonalex@....com / ChaoYi.Huang@...nect.polyu.hk
Pentester/Researcher
Dark2S Security Team/PolyU.HK