Buffer overflow in JustSystems Ichitaro

1) Stack-based buffer overflow

EUVDB-ID: #VU1354

Risk: Critical

CVSSv3.1: 8.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C]

CVE-ID: CVE-2007-6436

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to boundary error in JSGCI.DLL library when processing malicious documents. A remote attacker can create a specially crafted document file, trick the victim into opening it, cause stack-based buffer overflow and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability results in compromise of vulnerable system.

Note: this vulnerability is being actively exploited.

Mitigation

Install patches from vendor's website.

Vulnerable software versions

Ichitaro: 2004 - 2007

External links

http://www.justsystems.com/jp/info/pd7005.html
http://www.symantec.com/security_response/writeup.jsp?docid=2007-121308-3953-99

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.