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TITLE:
phpBB Activity Mod Plus Module "phpbb_root_path" File Inclusion

SECUNIA ADVISORY ID:
SA20354

VERIFY ADVISORY:
http://secunia.com/advisories/20354/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Activity Mod Plus 1.x (module for phpBB)
http://secunia.com/product/10213/

DESCRIPTION:
Mustafa Can Bjorn has reported a vulnerability in the Activity Mod
Plus module for phpBB, which can be exploited by malicious people to
compromise a vulnerable system.

Input passed to the "phpbb_root_path" parameter in
"language/lang_english/lang_activity.php" isn't properly verified,
before it is used to include files. This can be exploited to include
arbitrary files from external and local resources.

The "lang_activity_char.php" script is reportedly also affected.

Successful exploitation requires that "register_globals" is enabled.

SOLUTION:
Apply code changes as instructed by the vendor.
http://www.phpbb-amod.com/topics.html-t-2423

PROVIDED AND/OR DISCOVERED BY:
Mustafa Can Bjorn

ORIGINAL ADVISORY:
http://www.nukedx.com/?viewdoc=38

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