Remote code execution in JustSystems Ichitaro

1) Buffer overflow

EUVDB-ID: #VU4798

Risk: Critical

CVSSv4.0: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red]

CVE-ID: CVE-2013-3644

CWE-ID: CWE-120 - Buffer overflow

Exploit availability: No

Description

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

The weakness exists due to buffer overflow when processing office documents. A remote attacker can create a specially crafted document, trick the victim into opening it, trigger memory corruption and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability results in arbitrary code on the vulnerable system.

Note: the vulnerability was being actively exploited.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Ichitaro: 2006 - 2013

CPE2.3

• cpe:2.3:a:justsystems_corporation:ichitaro:2006:*:*:*:*:*:*:*
• cpe:2.3:a:justsystems_corporation:ichitaro:2007:*:*:*:*:*:*:*
• cpe:2.3:a:justsystems_corporation:ichitaro:2008:*:*:*:*:*:*:*

External links

https://www.justsystems.com/jp/info/js13002.html

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.