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TITLE:
Chilkat Crypt ActiveX Component "WriteFile()" Insecure Method

SECUNIA ADVISORY ID:
SA32513

VERIFY ADVISORY:
http://secunia.com/advisories/32513/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Chilkat Crypt ActiveX Component 4.x
http://secunia.com/advisories/product/20344/

DESCRIPTION:
shinnai has discovered a vulnerability in Chilkat Crypt ActiveX
Component, which can be exploited by malicious people to compromise a
user's system.

The vulnerability is caused due to the ChilkatCrypt2.ChilkatCrypt2.1
(ChilkatCrypt2.dll) ActiveX control including the insecure
"WriteFile()" method. This can be exploited to write arbitrary data
to arbitrary files in the context of the currently logged-on user.

Successful exploitation allows execution of arbitrary code.

The vulnerability is confirmed in ChilkatCrypt2.dll version 4.3.2.1.
Other versions may also be affected.

SOLUTION:
Set the kill-bit for the affected ActiveX control.

PROVIDED AND/OR DISCOVERED BY:
shinnai

ORIGINAL ADVISORY:
http://milw0rm.com/exploits/6963

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