Detections
Analytics
Linux Distros Unpatched Vulnerability : CVE-2021-3541
medium Nessus Plugin ID 223926
Language:
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.- A flaw was found in libxml2. Exponential entity expansion attack its possible bypassing all existing protection mechanisms and leading to denial of service. (CVE-2021-3541)
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
Plugin Details
Severity: Medium
ID: 223926
File Name: unpatched_CVE_2021_3541.nasl
Version: 1.3
Type: local
Agent: unix
Family: Misc.
Published: 3/5/2025
Updated: 8/31/2025
Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.6
CVSS v2
Risk Factor: Medium
Base Score: 4
Temporal Score: 3
Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P
CVSS Score Source: CVE-2021-3541
CVSS v3
Risk Factor: Medium
Base Score: 6.5
Temporal Score: 5.7
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:centos:centos:7, p-cpe:/a:centos:centos:libxml2, p-cpe:/a:redhat:enterprise_linux:libxml2-static, p-cpe:/a:centos:centos:libxml2-devel, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:libxml2-devel, p-cpe:/a:centos:centos:libxml2-python, p-cpe:/a:redhat:enterprise_linux:libxml2, p-cpe:/a:redhat:enterprise_linux:libxml2-python, p-cpe:/a:centos:centos:libxml2-static
Required KB Items: Host/OS/identifier, Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched
Exploit Ease: No known exploits are available
Vulnerability Publication Date: 6/16/2021
Reference Information
CVE: CVE-2021-3541