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TITLE:
Netwin SmsGate "Content-Length" Header Processing Denial of Service

SECUNIA ADVISORY ID:
SA29149

VERIFY ADVISORY:
http://secunia.com/advisories/29149/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
NetWin SmsGate 1.x
http://secunia.com/product/17845/

DESCRIPTION:
Luigi Auriemma has reported a vulnerability in Netwin SmsGate, which
can be exploited by malicious people to cause a DoS (Denial of
Service).

The vulnerability is caused due to an error when handling HTTP
"Content-Length" headers. This can be exploited to cause the service
to stop responding when it displays a debug message box via e.g. a
specially crafted HTTP request containing an overly large
"Content-Length" header value. 

NOTE: Reportedly, the DoS lasts only as long as the debug message box
is displayed and the server resumes if e.g. an admin selects the
"Ignore" button.

SOLUTION:
Restrict network access to the service.

PROVIDED AND/OR DISCOVERED BY:
Luigi Auriemma

ORIGINAL ADVISORY:
http://aluigi.altervista.org/adv/smsgheit-adv.txt

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