Multiple vulnerabilities in JustSystems products
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 4 |
| CVE-ID | CVE-2023-34366 CVE-2023-38127 CVE-2023-38128 CVE-2023-35126 |
| CWE-ID | CWE-416 CWE-190 CWE-843 CWE-129 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Rakuraku Hagaki Client/Desktop applications / Office applications Ichitaro Client/Desktop applications / Office applications JUST Office Client/Desktop applications / Office applications JUST Government Client/Desktop applications / Office applications JUST Police Client/Desktop applications / Office applications |
| Vendor | JustSystems Corporation |
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
1) Use-after-free
EUVDB-ID: #VU82233
Risk: Low
CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-34366
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error. A remote attacker can trick a victim to open a specially crafted file and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsRakuraku Hagaki: All versions
Ichitaro: 2021 - Viewer
JUST Office: 3 - 5
JUST Government: 3 - 5
JUST Police: 3 - 5
External linkshttp://jvn.jp/en/jp/JVN28846531/index.html
http://www.justsystems.com/jp/corporate/info/js23002.html
http://www.talosintelligence.com/vulnerability_reports/TALOS-2023-1758
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.
2) Integer overflow
EUVDB-ID: #VU82234
Risk: Low
CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-38127
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to integer overflow. A remote attacker can trick a victim to open a specially crafted file, trigger integer overflow and cause a denial of service condition on the target system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsRakuraku Hagaki: All versions
Ichitaro: 2021 - Viewer
JUST Office: 3 - 5
JUST Government: 3 - 5
JUST Police: 3 - 5
External linkshttp://jvn.jp/en/jp/JVN28846531/index.html
http://www.justsystems.com/jp/corporate/info/js23002.html
http://www.talosintelligence.com/vulnerability_reports/TALOS-2023-1808
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.
3) Type Confusion
EUVDB-ID: #VU82235
Risk: Low
CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-38128
CWE-ID:
CWE-843 - Type confusion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a type confusion error. A remote attacker can trick a victim to open a specially crafted file, trigger a type confusion error and cause a denial of service condition on the target system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsRakuraku Hagaki: All versions
Ichitaro: 2021 - Viewer
JUST Office: 3 - 5
JUST Government: 3 - 5
JUST Police: 3 - 5
External linkshttp://jvn.jp/en/jp/JVN28846531/index.html
http://www.justsystems.com/jp/corporate/info/js23002.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.
4) Improper Validation of Array Index
EUVDB-ID: #VU82236
Risk: Low
CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-35126
CWE-ID:
CWE-129 - Improper Validation of Array Index
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper validation of array index. A remote attacker can trick a victim to open a specially crafted file and cause a denial of service condition on the target system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsRakuraku Hagaki: All versions
Ichitaro: 2021 - Viewer
JUST Office: 3 - 5
JUST Government: 3 - 5
JUST Police: 3 - 5
External linkshttp://jvn.jp/en/jp/JVN28846531/index.html
http://www.justsystems.com/jp/corporate/info/js23002.html
http://www.talosintelligence.com/vulnerability_reports/TALOS-2023-1825
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.
