Vulnerability identifier: #VU56923

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-33600

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
F-Secure Internet Gatekeeper
Other software / Other software solutions

Vendor: F-Secure

Description

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

The vulnerability exists due to an assertion failure in the web user interface within the "usernameL parameter. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

F-Secure Internet Gatekeeper: 5

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External links
http://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fame
http://www.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-33600

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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.