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Linux Distros Unpatched Vulnerability : CVE-2025-66418

high Nessus Plugin ID 277666

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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.

 - urllib3 is a user-friendly HTTP client library for Python. Starting in version 1.24 and prior to 2.6.0, the number of links in the decompression chain was unbounded allowing a malicious server to insert a virtually unlimited number of compression steps leading to high CPU usage and massive memory allocation for the decompressed data. This vulnerability is fixed in 2.6.0. (CVE-2025-66418)

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-2025-66418

https://security-tracker.debian.org/tracker/CVE-2025-66418

https://ubuntu.com/security/CVE-2025-66418

Plugin Details

Severity: High

ID: 277666

File Name: unpatched_CVE_2025_66418.nasl

Version: 1.9

Type: local

Agent: unix

Family: Misc.

Published: 12/8/2025

Updated: 1/7/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.7

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

CVSS Score Source: CVE-2025-66418

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.9

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

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.9

Threat Score: 6.3

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H

Vulnerability Information

CPE: cpe:/o:centos:centos:7, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:8, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:centos:centos:fence-agents-aliyun, p-cpe:/a:centos:centos:fence-agents-all, p-cpe:/a:centos:centos:fence-agents-amt-ws, p-cpe:/a:centos:centos:fence-agents-apc, p-cpe:/a:centos:centos:fence-agents-apc-snmp, p-cpe:/a:centos:centos:fence-agents-aws, p-cpe:/a:centos:centos:fence-agents-azure-arm, p-cpe:/a:centos:centos:fence-agents-bladecenter, p-cpe:/a:centos:centos:fence-agents-brocade, p-cpe:/a:centos:centos:fence-agents-cisco-mds, p-cpe:/a:centos:centos:fence-agents-cisco-ucs, p-cpe:/a:centos:centos:fence-agents-common, p-cpe:/a:centos:centos:fence-agents-compute, p-cpe:/a:centos:centos:fence-agents-drac5, p-cpe:/a:centos:centos:fence-agents-eaton-snmp, p-cpe:/a:centos:centos:fence-agents-emerson, p-cpe:/a:centos:centos:fence-agents-eps, p-cpe:/a:centos:centos:fence-agents-gce, p-cpe:/a:centos:centos:fence-agents-heuristics-ping, p-cpe:/a:centos:centos:fence-agents-hpblade, p-cpe:/a:centos:centos:fence-agents-ibmblade, p-cpe:/a:centos:centos:fence-agents-ifmib, p-cpe:/a:centos:centos:fence-agents-ilo-moonshot, p-cpe:/a:centos:centos:fence-agents-ilo-mp, p-cpe:/a:centos:centos:fence-agents-ilo-ssh, p-cpe:/a:centos:centos:fence-agents-ilo2, p-cpe:/a:centos:centos:fence-agents-intelmodular, p-cpe:/a:centos:centos:fence-agents-ipdu, p-cpe:/a:centos:centos:fence-agents-ipmilan, p-cpe:/a:centos:centos:fence-agents-kdump, p-cpe:/a:centos:centos:fence-agents-mpath, p-cpe:/a:centos:centos:fence-agents-redfish, p-cpe:/a:centos:centos:fence-agents-rhevm, p-cpe:/a:centos:centos:fence-agents-rsa, p-cpe:/a:centos:centos:fence-agents-rsb, p-cpe:/a:centos:centos:fence-agents-sbd, p-cpe:/a:centos:centos:fence-agents-scsi, p-cpe:/a:centos:centos:fence-agents-virsh, p-cpe:/a:centos:centos:fence-agents-vmware-rest, p-cpe:/a:centos:centos:fence-agents-vmware-soap, p-cpe:/a:centos:centos:fence-agents-wti, p-cpe:/a:centos:centos:python-urllib3, p-cpe:/a:debian:debian_linux:python-urllib3, p-cpe:/a:redhat:enterprise_linux:resource-agents, p-cpe:/a:redhat:enterprise_linux:python3-urllib3, p-cpe:/a:redhat:enterprise_linux:python-urllib3, p-cpe:/a:redhat:enterprise_linux:fence-agents-aliyun, p-cpe:/a:redhat:enterprise_linux:fence-agents-all, p-cpe:/a:redhat:enterprise_linux:fence-agents-amt-ws, p-cpe:/a:redhat:enterprise_linux:fence-agents-apc, p-cpe:/a:redhat:enterprise_linux:fence-agents-apc-snmp, p-cpe:/a:redhat:enterprise_linux:fence-agents-aws, p-cpe:/a:redhat:enterprise_linux:fence-agents-azure-arm, p-cpe:/a:redhat:enterprise_linux:fence-agents-bladecenter, p-cpe:/a:redhat:enterprise_linux:fence-agents-brocade, p-cpe:/a:redhat:enterprise_linux:fence-agents-cisco-mds, p-cpe:/a:redhat:enterprise_linux:fence-agents-cisco-ucs, p-cpe:/a:redhat:enterprise_linux:fence-agents-common, p-cpe:/a:redhat:enterprise_linux:fence-agents-compute, p-cpe:/a:redhat:enterprise_linux:fence-agents-drac5, p-cpe:/a:redhat:enterprise_linux:fence-agents-eaton-snmp, p-cpe:/a:redhat:enterprise_linux:fence-agents-emerson, p-cpe:/a:redhat:enterprise_linux:fence-agents-eps, p-cpe:/a:redhat:enterprise_linux:fence-agents-gce, p-cpe:/a:redhat:enterprise_linux:fence-agents-heuristics-ping, p-cpe:/a:redhat:enterprise_linux:fence-agents-hpblade, p-cpe:/a:redhat:enterprise_linux:fence-agents-ibmblade, p-cpe:/a:redhat:enterprise_linux:fence-agents-ifmib, p-cpe:/a:redhat:enterprise_linux:fence-agents-ilo-moonshot, p-cpe:/a:redhat:enterprise_linux:fence-agents-ilo-mp, p-cpe:/a:redhat:enterprise_linux:fence-agents-ilo-ssh, p-cpe:/a:redhat:enterprise_linux:fence-agents-ilo2, p-cpe:/a:redhat:enterprise_linux:fence-agents-intelmodular, p-cpe:/a:redhat:enterprise_linux:fence-agents-ipdu, p-cpe:/a:redhat:enterprise_linux:fence-agents-ipmilan, p-cpe:/a:redhat:enterprise_linux:fence-agents-kdump, p-cpe:/a:redhat:enterprise_linux:fence-agents-mpath, p-cpe:/a:redhat:enterprise_linux:fence-agents-redfish, p-cpe:/a:redhat:enterprise_linux:fence-agents-rhevm, p-cpe:/a:redhat:enterprise_linux:fence-agents-rsa, p-cpe:/a:redhat:enterprise_linux:fence-agents-rsb, p-cpe:/a:redhat:enterprise_linux:fence-agents-sbd, p-cpe:/a:redhat:enterprise_linux:fence-agents-scsi, p-cpe:/a:redhat:enterprise_linux:fence-agents-virsh, p-cpe:/a:redhat:enterprise_linux:fence-agents-vmware-rest, p-cpe:/a:redhat:enterprise_linux:fence-agents-vmware-soap, p-cpe:/a:redhat:enterprise_linux:fence-agents-wti, p-cpe:/a:redhat:enterprise_linux:fence-agents-zvm, p-cpe:/a:canonical:ubuntu_linux:python-pip, p-cpe:/a:redhat:enterprise_linux:fence-agents-lpar, p-cpe:/a:redhat:enterprise_linux:resource-agents-aliyun, p-cpe:/a:redhat:enterprise_linux:resource-agents-gcp, p-cpe:/a:redhat:enterprise_linux:resource-agents-sap, p-cpe:/a:redhat:enterprise_linux:resource-agents-sap-hana, p-cpe:/a:redhat:enterprise_linux:resource-agents-sap-hana-scaleout, p-cpe:/a:redhat:enterprise_linux:sap-cluster-connector, p-cpe:/a:centos:centos:resource-agents, p-cpe:/a:centos:centos:resource-agents-aliyun, p-cpe:/a:centos:centos:resource-agents-gcp, p-cpe:/a:centos:centos:fence-agents-lpar, p-cpe:/a:redhat:enterprise_linux:fence-virt, p-cpe:/a:redhat:enterprise_linux:fence-virtd, p-cpe:/a:redhat:enterprise_linux:fence-virtd-libvirt, p-cpe:/a:redhat:enterprise_linux:fence-virtd-multicast, p-cpe:/a:redhat:enterprise_linux:fence-virtd-serial, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:python3-urllib3, p-cpe:/a:centos:centos:resource-agents-paf, p-cpe:/a:redhat:enterprise_linux:resource-agents-paf, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:redhat:enterprise_linux:9, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:redhat:enterprise_linux:fence-agents-ibm-powervs, p-cpe:/a:redhat:enterprise_linux:fence-agents-ibm-vpc, p-cpe:/a:redhat:enterprise_linux:fence-agents-kubevirt, p-cpe:/a:redhat:enterprise_linux:fence-agents-openstack, p-cpe:/a:redhat:enterprise_linux:fence-virtd-cpg, p-cpe:/a:redhat:enterprise_linux:fence-virtd-tcp, p-cpe:/a:redhat:enterprise_linux:ha-cloud-support, p-cpe:/a:centos:centos:fence-agents-ibm-powervs, p-cpe:/a:centos:centos:fence-agents-ibm-vpc, p-cpe:/a:centos:centos:fence-agents-kubevirt, p-cpe:/a:centos:centos:fence-agents-openstack, p-cpe:/a:centos:centos:fence-agents, p-cpe:/a:centos:centos:python3.11-urllib3, p-cpe:/a:redhat:enterprise_linux:fence-agents, p-cpe:/a:centos:centos:fence-agents-zvm, p-cpe:/a:centos:centos:fence-virt, p-cpe:/a:centos:centos:fence-virtd, p-cpe:/a:centos:centos:fence-virtd-cpg, p-cpe:/a:centos:centos:fence-virtd-libvirt, p-cpe:/a:centos:centos:fence-virtd-multicast, p-cpe:/a:centos:centos:fence-virtd-serial, p-cpe:/a:centos:centos:fence-virtd-tcp, p-cpe:/a:centos:centos:ha-cloud-support, p-cpe:/a:redhat:enterprise_linux:python3.11-urllib3, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:redhat:enterprise_linux:python-s3transfer, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:centos:centos:resource-agents-sap, p-cpe:/a:centos:centos:resource-agents-sap-hana, p-cpe:/a:centos:centos:resource-agents-sap-hana-scaleout, p-cpe:/a:centos:centos:sap-cluster-connector, p-cpe:/a:redhat:enterprise_linux:python3.12-urllib3, cpe:/o:canonical:ubuntu_linux:25.04, cpe:/o:redhat:enterprise_linux:10, cpe:/o:debian:debian_linux:14.0, p-cpe:/a:centos:centos:python-s3transfer, cpe:/o:canonical:ubuntu_linux:25.10, p-cpe:/a:centos:centos:python3.12-urllib3

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

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 12/5/2025

Reference Information

CVE: CVE-2025-66418