Vulnerability identifier: #VU2706
Vulnerability 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:
CWE-ID:
CWE-119
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Ichitaro
Client/Desktop applications /
Office applications
Vendor: JustSystems Corporation
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The weakness exists due to boundary error when parsing a malformed file. A remote attacker can create a specially crafted file or document using Web PURAGUINBYUA, trick the victim into opening it, trigger memory corruption, run a malicious program and execute arbitrary code on the system with privileges of the current user.
Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.
Note: the vulnerability was being actively exploited.
Mitigation
Install update from vendor's website:
http://www.justsystems.com/jp/info/js09001.html
Vulnerable software versions
Ichitaro: 2004 - lite2
External links
http://www.justsystems.com/jp/info/js09001.html
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
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.