Denial of service in Shadankun Server Security Type

1) Improper Check or Handling of Exceptional Conditions

EUVDB-ID: #VU46131

Risk: Medium

CVSSv3.1: 4.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:U/RC:C]

CVE-ID: CVE-2020-5622

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists when "Rule id" is assigned by the product's internal script overlap, due to it would not be able to add newly detected attack source IP addresses as the blocking targets. A remote attacker can cause a denial of service condition on the target system.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Shadankun Server Security Type: 1.5.3

External links

http://jvn.jp/en/jp/JVN42665874/index.html
http://www.shadan-kun.com/news/20200831/

Q & A

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.