Privilege escalation in Tenable Nessus



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-20135
CWE-ID CWE-264
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Tenable Nessus
Client/Desktop applications / Software for system administration

Vendor Tenable Network Security

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Privilege escalation

EUVDB-ID: #VU57847

Risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-20135

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

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

The vulnerability exists due to Nessus does not properly impose security restrictions. A local administrator can run specific executables on the Nessus Agent host.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Tenable Nessus: 8.0.0 - 8.15.2

CPE2.3 External links

https://www.tenable.com/security/tns-2021-18


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.



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