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Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : PolicyKit vulnerability (USN-3934-1)

medium Nessus Plugin ID 123750

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Synopsis

The remote Ubuntu host is missing a security update.

Description

It was discovered that PolicyKit incorrectly relied on the fork() system call in the Linux kernel being atomic. A local attacker could possibly use this issue to gain access to services that have cached authorizations.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-3934-1

Plugin Details

Severity: Medium

ID: 123750

File Name: ubuntu_USN-3934-1.nasl

Version: 1.6

Type: local

Agent: unix

Published: 4/4/2019

Updated: 10/21/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

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-2019-6133

CVSS v3

Risk Factor: Medium

Base Score: 6.7

Temporal Score: 5.8

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:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libpolkit-backend-1-0, p-cpe:/a:canonical:ubuntu_linux:libpolkit-backend-1-dev, p-cpe:/a:canonical:ubuntu_linux:libpolkit-gobject-1-0, p-cpe:/a:canonical:ubuntu_linux:libpolkit-gobject-1-dev, p-cpe:/a:canonical:ubuntu_linux:policykit-1, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:gir1.2-polkit-1.0, p-cpe:/a:canonical:ubuntu_linux:libpolkit-agent-1-0, p-cpe:/a:canonical:ubuntu_linux:libpolkit-agent-1-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: 4/3/2019

Vulnerability Publication Date: 1/11/2019

Reference Information

CVE: CVE-2019-6133

USN: 3934-1