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TITLE:
W-Agora Multiple File Inclusion Vulnerabilities

SECUNIA ADVISORY ID:
SA20779

VERIFY ADVISORY:
http://secunia.com/advisories/20779/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
W-Agora 4.x
http://secunia.com/product/911/

DESCRIPTION:
Dedi Dwianto has discovered some vulnerabilities in W-Agora, which
can be exploited by malicious people to compromise a vulnerable
system.

Input passed to the "inc_dir" parameter in init_admin.inc and
init.inc, and to the "inc_dir" and "cfg_dir" parameters in
extras/quicklist.php is not properly verified before being used to
include files. This can be exploited to execute arbitrary PHP code by
including files from local or external resources.

Examples:
http://[host]/add_user.php?inc_dir=[file]
http://[host]/browse_avatar.php?inc_dir=[file]
http://[host]/extras/quicklist.php?bn=1&cfg_dir=[file]
http://[host]/extras/quicklist.php?bn=1&inc_dir=[file]

Note: Many more files can be used as vectors due to including
init_admin.inc and init.inc.

The vulnerabilities have been confirmed in version 4.2.0. Other
versions may also be affected.

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

PROVIDED AND/OR DISCOVERED BY:
Dedi Dwianto a.k.a. the_day

ORIGINAL ADVISORY:
http://advisories.echo.or.id/adv/adv34-theday-2006.txt

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