TITLE:
Xoops Local File Inclusion Vulnerabilities

SECUNIA ADVISORY ID:
SA20176

VERIFY ADVISORY:
http://secunia.com/advisories/20176/

CRITICAL:
Moderately critical

IMPACT:
Exposure of sensitive information, System access

WHERE:
>From remote

SOFTWARE:
Xoops 2.x
http://secunia.com/product/327/

DESCRIPTION:
rgod has reported two vulnerabilities in Xoops, which can be
exploited by malicious people to disclose sensitive information and
potentially compromise a vulnerable system.

Input passed to the "xoopsConfig" array parameter when the
"xoopsOption[nocommon]" parameter is defined isn't properly verified,
before it is used to include files. This can be exploited to include
arbitrary files from local resources.

Examples:
http://[host]/misc.php?xoopsOption[nocommon]=1&xoopsConfig[language]=[file]%00
http://[host]/index.php?xoopsOption[nocommon]=1&xoopsConfig[theme_set]=[file]%00

Successful exploitation requires that "register_globals" is enabled
and that "magic_quotes_gpc" is disabled.

This can further be exploited to include PHP code injected into
Apache web logs or include PHP code injected into uploaded avatar
images (requires that avatar upload support is enabled and knowledge
of the uploaded filename).

The vulnerabilities have been reported in version 2.0.13.2. Other
versions may also be affected.

SOLUTION:
Edit the source code to ensure that input is properly verified.

Set "register_globals" to "Off".

PROVIDED AND/OR DISCOVERED BY:
rgod

ORIGINAL ADVISORY:
http://milw0rm.com/exploits/1811

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