Linux Distros Unpatched Vulnerability : CVE-2019-12522

medium Nessus Plugin ID 222508

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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.

- An issue was discovered in Squid through 4.7. When Squid is run as root, it spawns its child processes as a lesser user, by default the user nobody. This is done via the leave_suid call. leave_suid leaves the Saved UID as 0. This makes it trivial for an attacker who has compromised the child process to escalate their privileges back to root. (CVE-2019-12522)

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

Solution

There is no known solution at this time.

Plugin Details

Severity: Medium

ID: 222508

File Name: unpatched_CVE_2019_12522.nasl

Version: 1.3

Type: local

Agent: unix

Family: Misc.

Published: 3/4/2025

Updated: 9/1/2025

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

Risk Information

VPR

Risk Factor: Low

Score: 3.4

CVSS v2

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.3

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

CVSS Score Source: CVE-2019-12522

CVSS v3

Risk Factor: Medium

Base Score: 4.5

Temporal Score: 3.9

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:squid, cpe:/o:debian:debian_linux:14.0, cpe:/o:debian:debian_linux:11.0, cpe:/o:centos:centos:8, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:debian:debian_linux:squid, p-cpe:/a:redhat:enterprise_linux:squid-sysvinit, p-cpe:/a:centos:centos:squid-sysvinit, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:centos:centos:squid, cpe:/o:centos:centos:7, p-cpe:/a:canonical:ubuntu_linux:squid3, cpe:/o:redhat:enterprise_linux:8, cpe:/o:debian:debian_linux:13.0, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:25.04, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:centos:centos:squid-migration-script, p-cpe:/a:canonical:ubuntu_linux:squid, p-cpe:/a:redhat:enterprise_linux:squid-migration-script, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:debian:debian_linux:12.0

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: 4/15/2020

Reference Information

CVE: CVE-2019-12522

Detections

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