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Linux Distros Unpatched Vulnerability : CVE-2021-46143

high Nessus Plugin ID 229839

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize. (CVE-2021-46143)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2021-46143

https://security-tracker.debian.org/tracker/CVE-2021-46143

https://ubuntu.com/security/CVE-2021-46143

Plugin Details

Severity: High

ID: 229839

File Name: unpatched_CVE_2021_46143.nasl

Version: 1.2

Type: local

Agent: unix

Family: Misc.

Published: 3/5/2025

Updated: 8/10/2025

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2021-46143

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:xmlrpc-c-client%2b%2b, cpe:/o:debian:debian_linux:11.0, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:visp, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:cableswig, p-cpe:/a:canonical:ubuntu_linux:cadaver, p-cpe:/a:canonical:ubuntu_linux:coin3, p-cpe:/a:redhat:enterprise_linux:xmlrpc-c-c%2b%2b, p-cpe:/a:canonical:ubuntu_linux:ayttm, p-cpe:/a:canonical:ubuntu_linux:sitecopy, p-cpe:/a:centos:centos:xmlrpc-c-client%2b%2b, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:canonical:ubuntu_linux:vtk, p-cpe:/a:centos:centos:xmlrpc-c, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:canonical:ubuntu_linux:harp, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:redhat:enterprise_linux:thunderbird, p-cpe:/a:canonical:ubuntu_linux:poco, p-cpe:/a:canonical:ubuntu_linux:opencollada, cpe:/o:centos:centos:8, p-cpe:/a:canonical:ubuntu_linux:emboss, p-cpe:/a:canonical:ubuntu_linux:ibm-3270, p-cpe:/a:canonical:ubuntu_linux:vnc4, p-cpe:/a:redhat:enterprise_linux:xmlrpc-c, p-cpe:/a:canonical:ubuntu_linux:xmlrpc-c, p-cpe:/a:redhat:enterprise_linux:xulrunner-devel, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:canonical:ubuntu_linux:matanza, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:centos:centos:xulrunner, p-cpe:/a:redhat:enterprise_linux:xmlrpc-c-devel, p-cpe:/a:canonical:ubuntu_linux:coda, p-cpe:/a:canonical:ubuntu_linux:tla, p-cpe:/a:centos:centos:xmlrpc-c-client, p-cpe:/a:centos:centos:firefox, p-cpe:/a:canonical:ubuntu_linux:astropy, p-cpe:/a:redhat:enterprise_linux:xmlrpc-c-client, p-cpe:/a:canonical:ubuntu_linux:insighttoolkit, p-cpe:/a:canonical:ubuntu_linux:tdom, p-cpe:/a:centos:centos:xulrunner-devel, p-cpe:/a:canonical:ubuntu_linux:wbxml2, p-cpe:/a:canonical:ubuntu_linux:insighttoolkit4, p-cpe:/a:centos:centos:xmlrpc-c-devel, p-cpe:/a:canonical:ubuntu_linux:libsynthesis, cpe:/o:canonical:ubuntu_linux:25.04, cpe:/o:centos:centos:7, p-cpe:/a:canonical:ubuntu_linux:paraview, p-cpe:/a:canonical:ubuntu_linux:qtwebengine-opensource-src, p-cpe:/a:debian:debian_linux:libxmltok, p-cpe:/a:redhat:enterprise_linux:xulrunner, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:canonical:ubuntu_linux:insighttoolkit5, p-cpe:/a:canonical:ubuntu_linux:mame, p-cpe:/a:canonical:ubuntu_linux:swish-e, p-cpe:/a:centos:centos:thunderbird, p-cpe:/a:centos:centos:xmlrpc-c-c%2b%2b, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:xsd, p-cpe:/a:canonical:ubuntu_linux:libxmltok, p-cpe:/a:redhat:enterprise_linux:firefox

Required KB Items: Host/OS/identifier, Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 1/6/2022

Reference Information

CVE: CVE-2021-46143