- NJStar Word Processor Font Name Buffer Overflow -
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Table of Contents
Affected Software....................................................1
Severity.............................................................2
Description of Vulnerability.........................................3
Solution.............................................................4
Time Table...........................................................5
Credits..............................................................6
References...........................................................7
About Secunia........................................................8
Verification.........................................................9
Rating: Moderately Critical
Impact: System access
Where: Remote
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3) Description of Vulnerability
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.
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8) About Secunia
Secunia collects, validates, assesses, and writes advisories regarding
all the latest software vulnerabilities disclosed to the public. These
advisories are gathered in a publicly available database at the
Secunia website:
http://secunia.com/
Secunia offers services to our customers enabling them to receive all
relevant vulnerability information to their specific system
configuration.
Secunia offers a FREE mailing list called Secunia Security Advisories:
Secunia Research 20/02/2006
- NJStar Word Processor Font Name Buffer Overflow -
======================================================================
Table of Contents
Affected Software....................................................1
Severity.............................................................2
Description of Vulnerability.........................................3
Solution.............................................................4
Time Table...........................................................5
Credits..............................................................6
References...........................................................7
About Secunia........................................................8
Verification.........................................................9
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1) Affected Software
* NJStar Chinese/Japanese Word Processor 5.01.41108.
* NJStar Chinese/Japanese Word Processor 4.x and 5.0x.
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2) Severity
Rating: Moderately Critical
Impact: System access
Where: Remote
======================================================================
3) Description of Vulnerability
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.
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4) Solution
Update to version 5.10.
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5) Time Table
03/02/2006 - Initial vendor notification.
04/02/2006 - Initial vendor reply.
18/02/2006 - Vendor released fixed versions.
20/02/2006 - Public disclosure.
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6) Credits
Discovered by Tan Chew Keong, Secunia Research.
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7) References
No other references.
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8) About Secunia
Secunia collects, validates, assesses, and writes advisories regarding
all the latest software vulnerabilities disclosed to the public. These
advisories are gathered in a publicly available database at the
Secunia website:
http://secunia.com/
Secunia offers services to our customers enabling them to receive all
relevant vulnerability information to their specific system
configuration.
Secunia offers a FREE mailing list called Secunia Security Advisories:
http://secunia.com/secunia_security_advisories/
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9) Verification
Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2006-5/advisory/
Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/
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