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TITLE:
JBlog Security Bypass and Cross-Site Scripting

SECUNIA ADVISORY ID:
SA26165

VERIFY ADVISORY:
http://secunia.com/advisories/26165/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass, Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
JBlog 1.x
http://secunia.com/product/14850/

DESCRIPTION:
S4mi has discovered some vulnerabilities in JBlog, which can be
exploited by malicious people to conduct cross-site scripting attacks
and to bypass certain security restrictions.

1) A vulnerability is caused due to improper authentication
verification in admin/ajoutaut.php. This can be exploited to create
new administrators and other user types, without having any valid
user credentials.

2) Input passed to the "id" parameter in index.php (when "pcomm" is
set to "com") and the "search" parameter in recherche.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 an affected site.

The vulnerabilities are confirmed in version 1.0. Other versions may
also be affected.

SOLUTION:
Restrict access to the admin/ directory (e.g. with ".htaccess"). Edit
the source code to ensure that input is properly sanitised.

PROVIDED AND/OR DISCOVERED BY:
S4mi

ORIGINAL ADVISORY:
http://milw0rm.com/exploits/4211

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