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TITLE:
Tumbleweed SecureTransport FileTransfer ActiveX Control
"TransferFile()" Buffer Overflow

SECUNIA ADVISORY ID:
SA29717

VERIFY ADVISORY:
http://secunia.com/advisories/29717/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Tumbleweed SecureTransport Server
http://secunia.com/product/14318/

DESCRIPTION:
Patrick Webster has reported a vulnerability in Tumbleweed
SecureTransport, which can be exploited by malicious people to
compromise a user's system.

The vulnerability is caused due to a boundary error in the
SecureTransport FileTransfer ActiveX Control (e.g. vcst_eu.dll,
vcst_en.dll) when handling arguments to the "TransferFile()" method.
This can be exploited to cause a stack-based buffer overflow by
passing an overly long "remoteFile" string to the affected method.

Successful exploitation allows execution of arbitrary code.

The vulnerability is reported in vcst_eu.dll version 1.0.0.5. Other
versions may also be affected.

SOLUTION:
Reportedly fixed in SecureTransport Server 4.6.1 Hotfix 20.

PROVIDED AND/OR DISCOVERED BY:
Patrick Webster

ORIGINAL ADVISORY:
http://www.aushack.com/200708-tumbleweed.txt

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About:
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