TITLE:
NJStar Word Processor Font Name Buffer Overflow

SECUNIA ADVISORY ID:
SA18702

VERIFY ADVISORY:
http://secunia.com/advisories/18702/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
NJStar Japanese Word Processor 5.x
http://secunia.com/product/8154/
NJStar Japanese Word Processor 4.x
http://secunia.com/product/8153/
NJStar Chinese Word Processor 5.x
http://secunia.com/product/8152/
NJStar Chinese Word Processor 4.x
http://secunia.com/product/8151/

DESCRIPTION:
Secunia Research has discovered a vulnerability in NJStar Word
Processor, which can be exploited by malicious people to compromise a
user's system.

The vulnerability is caused due to a boundary error within the
handling of font names read from a NJStar document file (".njx").
This can be exploited to cause a stack-based buffer overflow.

Successful exploitation allows arbitrary code execution when a
malicious ".njx" file is opened.

The vulnerability has been confirmed in the following products:
* NJStar Japanese Word Processor 5.01.41108.
* NJStar Chinese Word Processor 5.01.41108.

The vendor has reported that the vulnerability also affects NJStar
Chinese/Japanese Word Processor versions 4.x and 5.0x.

SOLUTION:
Update to version 5.10.
http://www.njstar.com/info/download.php

PROVIDED AND/OR DISCOVERED BY:
Tan Chew Keong, Secunia Research.

ORIGINAL ADVISORY:
Secunia Research:
http://secunia.com/secunia_research/2006-5/

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About:
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