Remote code execution in JustSystems Ichitaro

1) Buffer overflow

EUVDB-ID: #VU1180

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-2006-4326

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 weakness is due to stack-based buffer overflow. By persuading the victim to open a modified document, a remote attacker can execute arbitrary code.

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

Note: this vulnerability was being actively exploited.

Mitigation

Install patched version from vendor's website.

Vulnerable software versions

Ichitaro: Viewer Ichitaro for Linux - 2006

CPE2.3

• cpe:2.3:a:justsystems_corporation:ichitaro:Government 2006:*:*:*:*:*:*:*
• cpe:2.3:a:justsystems_corporation:ichitaro:9.0:*:*:*:*:*:*:*

External links

https://www.justsystems.com/jp/info/pd6002.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.