#VU51578 Information disclosure in Nessus Agent - CVE-2021-20077

Vulnerability identifier: #VU51578

Vulnerability risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-20077

CWE-ID: CWE-200

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 gain access to potentially sensitive information.

The vulnerability exists due to Nessus Agent inadvertently captures the IAM role security token on the local host during initial linking of the Nessus Agent when installed on an Amazon EC2 instance. A local privileged user can obtain the token.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Nessus Agent: 7.2.0 - 8.2.2

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External links
https://www.tenable.com/security/tns-2021-04-0

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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.