Local Privilege Escalation

In Tenable Nessus versions prior to 10.8.5 on a Windows host, it was found that a non-administrative user could overwrite arbitrary local system files with log content at SYSTEM privilege.

Insufficiently Protected Credentials: An authenticated user with debug privileges can retrieve stored Nessus policy credentials from the “nessusd” process in cleartext via process dumping. The affected products are all versions of Nessus Essentials and Professional. The vulnerability allows an attacker to access credentials stored in Nessus scanners, potentially compromising its customers’ network of assets.

An authenticated attacker could read Nessus Debug Log file attachments from the web UI without having the correct privileges to do so. This may lead to the disclosure of information on the scan target and/or the Nessus scan to unauthorized parties able to reach the Nessus instance.

An authenticated attacker could utilize the identical agent and cluster node linking keys to potentially allow for a scenario where unauthorized disclosure of agent logs and data is present.

Nessus 6.10.x before 6.10.5 was found to be vulnerable to a local privilege escalation issue due to insecure permissions when running in Agent Mode.

moment.js: regular expression denial of service

The duration function in the moment package before 2.11.2 for Node.js allows remote attackers to cause a denial of service (CPU consumption) via a long string, aka a "regular expression Denial of Service (ReDoS)."

Cross-site scripting (XSS) vulnerability in Tenable Nessus before 6.9.1 allows remote authenticated users to inject arbitrary web script or HTML via unspecified vectors.

Cross-site scripting (XSS) vulnerability in Tenable Nessus before 6.9 allows remote authenticated users to inject arbitrary web script or HTML via vectors related to handling of .nessus files.

When linking a Nessus scanner or agent to Tenable.io or other manager, Nessus 6.x before 6.11 does not verify the manager's TLS certificate when making the initial outgoing connection. This could allow man-in-the-middle attacks.

Cross-site scripting vulnerability in Nessus versions 6.8.0, 6.8.1, 6.9.0, 6.9.1 and 6.9.2 allows remote authenticated attackers to inject arbitrary web script or HTML via unspecified vectors.

Tenable Nessus before 6.10.2 (as used alone or in Tenable Appliance before 4.5.0) was found to contain a flaw that allowed a remote, authenticated attacker to upload a crafted file that could be written to anywhere on the system. This could be used to subsequently gain elevated privileges on the system (e.g., after a reboot). This issue only affects installations on Windows.

Nessus 6.6.2 - 6.10.3 contains a flaw related to insecure permissions that may allow a local attacker to escalate privileges when the software is running in Agent Mode. Version 6.10.4 fixes this issue.

Nessus 6.10.x before 6.10.5 was found to be vulnerable to a local denial of service condition due to insecure permissions when running in Agent Mode.

Cross-site scripting (XSS) vulnerability in Tenable Nessus before 6.9.3 allows remote authenticated users to inject arbitrary web script or HTML via unspecified vectors.

A race condition in the wmi_malware_scan.nbin plugin before 201402262215 for Nessus 5.2.1 allows local users to gain privileges by replacing the dissolvable agent executable in the Windows temp directory with a Trojan horse program.

The /server/properties resource in Tenable Web UI before 2.3.5 for Nessus 5.2.3 through 5.2.7 allows remote attackers to obtain sensitive information via the token parameter.

A privilege escalation vulnerability was identified in Nessus versions 8.10.1 through 8.15.8 and 10.0.0 through 10.4.1. An authenticated attacker could potentially execute a specially crafted file to obtain root or NT AUTHORITY / SYSTEM privileges on the Nessus host.

As part of our Security Development Lifecycle, a potential privilege escalation issue was identified internally. This could allow a malicious actor with sufficient permissions to modify environment variables and abuse an impacted plugin in order to escalate privileges. We have resolved the issue and also made several defense-in-depth fixes alongside. While the probability of successful exploitation is low, Tenable is committed to securing our customers’ environments and our products. The updates have been distributed via the Tenable plugin feed in feed serial numbers equal to or greater than #202212212055.

A vulnerability was reported where through modifying the scan variables, an authenticated user in Tenable products, that has Scan Policy Configuration roles, could manipulate audit policy variables to execute arbitrary commands on credentialed scan targets.

Arbitrary File Write

An arbitrary file write vulnerability exists where an authenticated, remote attacker with administrator privileges on the Nessus application could alter Nessus Rules variables to overwrite arbitrary files on the remote host, which could lead to a denial of service condition.