TITLE:
aoblogger Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA16889

VERIFY ADVISORY:
http://secunia.com/advisories/16889/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass, Cross Site Scripting, Manipulation of data

WHERE:
>From remote

SOFTWARE:
aoblogger 2.x
http://secunia.com/product/6863/

DESCRIPTION:
Aliaksandr Hartsuyeu has discovered some vulnerabilities in
aoblogger, which can be exploited by malicious people to bypass
certain security restrictions, and conduct script insertion and SQL
injection attacks.

1) Input passed via the "url" bbcode tag when posting a comment isn't
properly verified, before being used. This can be exploited to inject
arbitrary script code, which will be executed in a user's browser
session in context of an affected site when a malicious link with the
"JavaScript" URI handler is followed from a malicious comment.

Example:
[url]javascript:[code][/url]

2) Input passed to the "username" parameter in "login.php" isn't
properly sanitised before being used in a SQL query. This can be
exploited to manipulate SQL queries by injecting arbitrary SQL code.

Successful exploitation requires that "magic_quotes_gpc" is
disabled.

3) An error in the authorisation handling can be exploited to post
new entries without being authenticated as the administrator by
setting the "uza" parameter to "1" when accessing "create.php".

The vulnerabilities have been confirmed in version 2.3. Other
versions may also be affected.

SOLUTION:
Edit the source code to ensure that input is properly sanitised and
that only administrators can post new entries.

PROVIDED AND/OR DISCOVERED BY:
Aliaksandr Hartsuyeu

ORIGINAL ADVISORY:
http://evuln.com/vulns/37/summary.html

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