TITLE:
VSNS Lemon Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA19420

VERIFY ADVISORY:
http://secunia.com/advisories/19420/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass, Cross Site Scripting, Manipulation of data

WHERE:
>From remote

SOFTWARE:
VSNS Lemon 3.x
http://secunia.com/product/8970/

DESCRIPTION:
Aliaksandr Hartsuyeu has discovered multiple vulnerabilities in VSNS
Lemon, which can be exploited by malicious people to conduct script
insertion attacks, to bypass certain authentication, and to conduct
SQL injection attack.

1) Input passed to the "name" parameter when adding a comment is not
properly sanitised before being used. This can be exploited to
execute arbitrary HTML and script code in a user's browser session in
context of an affected site when the malicious data is viewed.

2) Access to password protected articles is not properly
authenticated in "functions/final_functions.php". This can be
exploited to bypass authentication by sending forged cookie
parameters.

3) Input passed to the "id" parameter in
"functions/final_functions.php" is not properly sanitised before
being used in a SQL query. This can be exploited to manipulate SQL
queries by injecting arbitrary SQL code.

Successful exploitation requires "magic_quotes_gpc" to be disabled.

The vulnerabilities have been confirmed in version 3.2.0. Other
versions may also be affected.

SOLUTION:
Edit the source code to ensure input is properly sanitised.

Do not rely on password protection for articles.

PROVIDED AND/OR DISCOVERED BY:
Aliaksandr Hartsuyeu

ORIGINAL ADVISORY:
http://evuln.com/vulns/106/summary.html

----------------------------------------------------------------------

About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

----------------------------------------------------------------------

Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org

----------------------------------------------------------------------