#VU56386 Input validation error in Nessus Agent - CVE-2021-20117

Vulnerability identifier: #VU56386

Vulnerability risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-20117

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: No

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

Vendor: Tenable Network Security

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to insufficient validation of user-supplied input. A local user can run a specially crafted program to execute arbitrary code with elevated privileges.

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?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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