Date: 2 Apr 2008 12:29:09 -0000
From: [email protected]
To: [email protected]Subject: Writers Block SQL Injection Vulnerabilities
X-Eagle-Notice: Sender not 8-bit clean in Subject: Writer\222s Block SQL Injection Vulnerabilities
X-Virus-Scanned: antivirus-gw at tyumen.ru
[>>] Writer’s Block SQL Injection Vulnerabilities [<<]
[x] Vendor Information
"If the written word is the wheel, then Writer’s Block is the sweet, sweet fossil fuel in the
engine that keeps it spinning. A free, flexible, elegant Content Management System that helps
you maintain any web site you want, at any size you want, with no hassle and no restrictions.
In fact, it’s running this entire site right now."
http://www.desiquintans.com
[x] Attack Information
The variable "PostID" can be filled with malicious content to execute SQL code:
----
permalink.php, line 212:
$getpost = @mysql_query("SELECT Title, Timestamp, Body, PostCat1, PostCat2, PostCat3, PostCat4, Author FROM ".POSTS_TBL." WHERE
PostID='".$_GET['PostID']."' AND Draft=0");
----
permalink.php, line 298:
$prevlink = mysql_query("SELECT PostID FROM ".POSTS_TBL." WHERE PostID<".$_GET['PostID']." AND Draft=0 ORDER BY Timestamp DESC LIMIT 1");
----
permalink.php, line 304:
$nextlink = mysql_query("SELECT PostID FROM ".POSTS_TBL." WHERE PostID>".$_GET['PostID']." AND Draft=0 ORDER BY Timestamp ASC LIMIT 1");
----
[x] Exploit
The issue can be exploited through a web browser.
[x] Patch
Just add an intval():
----
permalink.php, line 212:
$getpost = @mysql_query("SELECT Title, Timestamp, Body, PostCat1, PostCat2, PostCat3, PostCat4, Author FROM ".POSTS_TBL." WHERE
PostID='".intval($_GET['PostID'])."' AND Draft=0");
----
permalink.php, line 298:
$prevlink = mysql_query("SELECT PostID FROM ".POSTS_TBL." WHERE PostID<".intval($_GET['PostID'])." AND Draft=0 ORDER BY Timestamp DESC LIMIT 1");
----
permalink.php, line 304:
$nextlink = mysql_query("SELECT PostID FROM ".POSTS_TBL." WHERE PostID>".intval($_GET['PostID'])." AND Draft=0 ORDER BY Timestamp ASC LIMIT 1");
----
[x] Credits
The vulnerability has been discovered by katharsis -
www.katharsis.x2.to
