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TITLE:
PHP-Nuke SQL Filter Bypass and SQL Injection Vulnerabilities

SECUNIA ADVISORY ID:
SA24949

VERIFY ADVISORY:
http://secunia.com/advisories/24949/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass, Manipulation of data, Exposure of sensitive
information

WHERE:
>From remote

SOFTWARE:
PHP-Nuke 7.x
http://secunia.com/product/2385/

DESCRIPTION:
Aleksandar has discovered some vulnerabilities in PHP-Nuke, which can
be exploited by malicious people to conduct SQL injection attacks and
to bypass certain security restrictions.

1) The product's SQL injection filter checks for the string "/*" but
not for the URL-encoded version "%2f%2a". This can be exploited to
bypass the SQL injection filter.

2) Input passed to the "lid" parameter through modules.php to
modules/Web_Links/index.php (when "l_op" is set to
"viewlinkcomments", "viewlinkeditorial", or "ratelink") is not
properly sanitised before being used in SQL queries. This can be
exploited to manipulate SQL queries by injecting arbitrary SQL code.

Successful exploitation allows e.g. retrieving administrator password
hashes, but requires that "magic_quotes_gpc" is disabled, and that the
attacker has knowledge of the database table prefix.

3) Input passed to the "lid" parameter through modules.php to
modules/Downloads/index.php (when "d_op" is set to
"viewdownloadeditorial", "viewdownloadcomments", or to
"ratedownload") is not properly sanitised before being used in SQL
queries. This can be exploited to manipulate SQL queries by injecting
arbitrary SQL code.

Successful exploitation allows e.g. retrieving administrator password
hashes, but requires that "magic_quotes_gpc" is disabled, and that the
attacker has knowledge of the database table prefix.

The vulnerabilities are confirmed in version 7.9. Other versions may
also be affected.

SOLUTION:
Edit the source code to ensure that input is properly sanitised and
that the SQL injection filter checks for both normal and URL-encoded
versions of dangerous strings.

Set "magic_quotes_gpc" in php.ini to On.

Use another product.

PROVIDED AND/OR DISCOVERED BY:
Aleksandar

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About:
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