#VU56387 Input validation error in Nessus Agent - CVE-2021-20118

Vulnerability identifier: #VU56387

Vulnerability risk: Medium

CVSSv4.0: 6.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-20118

CWE-ID: CWE-20

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Nessus Agent
Client/Desktop applications / Other client software

Vendor: Tenable Network Security

Description

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

The vulnerability exists due to insufficient validation of user-supplied input. A remote user on the local network can execute arbitrary code on the affected system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Nessus Agent: 8.0.0 - 8.3.0

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External links
https://www.tenable.com/security/tns-2021-15

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.