Exploitalert - Database of Exploits

Secunia Research: NJStar Word Processor Font Name Buffer Overflow

CVE	Category	Price	Severity
CVE-2010-2558	CWE-119	$3000	High

Author	Risk	Exploitation Type	Date
Secunia Research	High	Local	2006-02-25

CPE
cpe:cpe:/a:njstar:njstar_word_processor

CVSS	EPSS	EPSSP
CVSS:4.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	0.85	0.999

CVSS vector description

Metric	Value	Metric Description	Value Description
Attack vector	Network	AV	The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity	Low	AC	The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required	None	PR	The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction	None	UI	The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope	Unchanged	S	An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality	High	C	There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity	High	I	There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability	High	A	There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.

http://cxsecurity.com/ascii/WLB-2006020065

====================================================================== 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 ====================================================================== 1) Affected Software * NJStar Chinese/Japanese Word Processor 5.01.41108. * NJStar Chinese/Japanese Word Processor 4.x and 5.0x. ====================================================================== 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. ====================================================================== 4) Solution Update to version 5.10. ====================================================================== 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. ====================================================================== 6) Credits Discovered by Tan Chew Keong, Secunia Research. ====================================================================== 7) References No other references. ====================================================================== 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/ ====================================================================== 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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