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Linux Distros Unpatched Vulnerability : CVE-2022-42917

medium Nessus Plugin ID 345653

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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 FRRouting FRR before 8.5, the service user (usually frr) can escalate its privileges to root by monitoring the configuration directory (/etc/frr) and replacing config files upon creation with, for example, symlinks to change the ownership of arbitrary files. This is a TOCTOU Race Condition caused by a combination of touch and chown. (CVE-2022-42917)

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-2022-42917

https://ubuntu.com/security/CVE-2022-42917

Plugin Details

Severity: Medium

ID: 345653

File Name: unpatched_CVE_2022_42917.nasl

Version: 1.5

Type: Local

Agent: unix

Family: Misc.

Published: 9/14/2026

Updated: 9/21/2026

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.2

CVSS v2

Risk Factor: Medium

Base Score: 6

Temporal Score: 5.1

Vector: CVSS2#AV:L/AC:H/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2022-42917

CVSS v3

Risk Factor: Medium

Base Score: 6.7

Temporal Score: 6.1

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, cpe:/o:centos:centos:8, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:canonical:ubuntu_linux:frr, p-cpe:/a:canonical:ubuntu_linux:quagga, p-cpe:/a:centos:centos:frr-contrib, p-cpe:/a:centos:centos:frr-selinux, p-cpe:/a:centos:centos:frr, p-cpe:/a:redhat:enterprise_linux:frr-contrib, p-cpe:/a:redhat:enterprise_linux:frr-selinux, p-cpe:/a:redhat:enterprise_linux:frr

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

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 9/13/2026

Reference Information

CVE: CVE-2022-42917