Tenable Nessus 8.x.x < 8.15.0 Multiple Vulnerabilities (TNS-2021-11)

medium Nessus Plugin ID 150798


Tenable Nessus running on the remote host is affected by multiple vulnerabilities.


According to its self-reported version, the Tenable Nessus application running on the remote host is prior to 8.15.0. It is, therefore, affected by multiple vulnerabilities:

- Multiple local privilege escalation vulnerabilities. A local attacker can exploit these to gain administrator privileges to the system. (CVE-2021-20099, CVE-2021-20100)

- In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks). (CVE-2018-20843)

- In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber) then resulted in a heap-based buffer over-read. (CVE-2019-15903)

- In SQLite through 3.29.0, whereLoopAddBtreeIndex in sqlite3.c can crash a browser or other application because of missing validation of a sqlite_stat1 sz field, aka a 'severe division by zero in the query planner.' (CVE-2019-16168)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.


Upgrade to Tenable Nessus version 8.15.0 or later.

See Also


Plugin Details

Severity: Medium

ID: 150798

File Name: nessus_tns_2021_11.nasl

Version: 1.6

Type: remote

Family: Misc.

Published: 6/15/2021

Updated: 4/11/2022

Configuration: Enable thorough checks

Risk Information


Risk Factor: Medium

Score: 5.9


Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS Score Source: CVE-2021-20100


Risk Factor: Medium

Base Score: 6.7

Temporal Score: 5.8

Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:tenable:nessus

Required KB Items: installed_sw/nessus

Exploit Ease: No known exploits are available

Patch Publication Date: 6/15/2021

Vulnerability Publication Date: 6/15/2021

Reference Information

CVE: CVE-2018-20843, CVE-2019-15903, CVE-2019-16168, CVE-2021-20099, CVE-2021-20100

IAVB: 2021-B-0039