Detections
Analytics

Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : zuluCrypt vulnerability (USN-8218-1)

critical Nessus Plugin ID 311779

Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-8218-1 advisory.

 Aaron Rainbolt discovered that zuluCrypt used insecure PolicyKit settings in zuluPolkit. An attacker could possibly use this issue to cause local privilege escalation to root. (CVE-2025-53391)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-8218-1

Plugin Details

Severity: Critical

ID: 311779

File Name: ubuntu_USN-8218-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 5/2/2026

Updated: 5/2/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.5

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2025-53391

CVSS v3

Risk Factor: Critical

Base Score: 9.3

Temporal Score: 8.1

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:zulumount-cli, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libzulucryptpluginmanager1.0.0, p-cpe:/a:canonical:ubuntu_linux:libzulucrypt-exe1.2.0, p-cpe:/a:canonical:ubuntu_linux:zulumount-gui, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:zulupolkit, p-cpe:/a:canonical:ubuntu_linux:zulusafe-cli, p-cpe:/a:canonical:ubuntu_linux:zulucrypt-cli, p-cpe:/a:canonical:ubuntu_linux:libzulucrypt-plugins, p-cpe:/a:canonical:ubuntu_linux:libzulucrypt1.2.0, p-cpe:/a:canonical:ubuntu_linux:libzulucrypt-dev, p-cpe:/a:canonical:ubuntu_linux:libzulucrypt-exe-dev, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:zulucrypt-gui, p-cpe:/a:canonical:ubuntu_linux:libzulucryptpluginmanager-dev

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Ease: No known exploits are available

Patch Publication Date: 4/30/2026

Vulnerability Publication Date: 6/28/2025

Reference Information

CVE: CVE-2025-53391

USN: 8218-1