Bug: YapBB <= 1.2 Beta2 'find.php' SQL Injection Vulnerability ( Ascii Version )

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YapBB <= 1.2 Beta2 'find.php' SQL Injection Vulnerability

Published
Credit
Risk
2006.05.23
geinblues
Medium
CWE
CVE
Local
Remote
CWE-89
CVE-2006-2486
No
Yes

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.4/10
4.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
None


Title : YapBB <= 1.2 Beta2 'find.php' SQL Injection Vulnerability

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

Author : x90c(Kyong Joo, Jung)

Published : 2006.5.16

E-mail : geinblues [at] gmail.com

Site : http://www.chollian.net/~jyj9782

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

0x01 Summary

YapBB is a OpenSource Web Forum written in php.

(http://sourceforge.net/projects/yapbb)

This web program is vulnerable to sql injection attack.

So malicious attacker can get Every nicknames(id), passwords for this YapBB.

Let's see the codes ~!

0x02 Testbed

- Fedora Core 2

- MySQL-Server 5.0.19-log

- Php5 ( magic_quotes_gpc = On )

0x03 Codes

~/YapBB-1.2-Beta2/YapBB/find.php:

-

..

34: $userBool = $HTTP_POST_VARS["choice"]=="user"; // if choice == 'user'

36: $userpostBool = !empty($HTTP_GET_VARS["userID"]); // userID == '[inject sql]'

..

119: else if ($userpostBool)

120: {

128: $postRes = $postQuery->select("SELECT p.date, t.id, t.description, u.nickname FROM " .

$cfgDatabase['post'] . " AS p, " . $cfgDatabase['topic'] . " AS t, " .

$cfgDatabase['user'] . " AS u WHERE t.id = p.topicid AND p.posterid = $userID AND

u.id = p.posterid GROUP BY p.topicid ORDER BY p.date DESC LIMIT 50"); // execute sql!

-

No words.

I wrote a exploit for getting all YapBB user's nicknames and passwords.

Sorry i can't put exploit in this advisory =)

0x04 Exploit

[x90c@hackzen testbed]$ whoami

x90c

[x90c@hackzen testbed]$

0x05 Patch

~/YapBB-1.2-Beta2/YapBB/find.php:

..

128: $postRes = $postQuery->select("SELECT p.date, t.id, t.description, u.nickname FROM " .

$cfgDatabase['post'] . " AS p, " . $cfgDatabase['topic'] . " AS t, " . $cfgDatabase['user'] .

" AS u WHERE t.id = p.topicid AND p.posterid = '" . addslashes($userID) .

"' AND u.id = p.posterid GROUP BY p.topicid ORDER BY p.date DESC LIMIT 50"); // x90c patch!

..

Thanks!

- Blu3h4t Team in korea

See this note in TXT Version

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