Ubuntu 18.04 LTS / 20.04 LTS : DBus vulnerability (USN-5244-2)

high Nessus Plugin ID 160853

Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 18.04 LTS / 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-5244-2 advisory.

- A use-after-free flaw was found in D-Bus Development branch <= 1.13.16, dbus-1.12.x stable branch <= 1.12.18, and dbus-1.10.x and older branches <= 1.10.30 when a system has multiple usernames sharing the same UID. When a set of policy rules references these usernames, D-Bus may free some memory in the heap, which is still used by data structures necessary for the other usernames sharing the UID, possibly leading to a crash or other undefined behaviors (CVE-2020-35512)

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-5244-2

Plugin Details

Severity: High

ID: 160853

File Name: ubuntu_USN-5244-2.nasl

Version: 1.2

Type: local

Agent: unix

Published: 5/10/2022

Updated: 5/10/2022

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS Score Source: CVE-2020-35512

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:dbus, p-cpe:/a:canonical:ubuntu_linux:dbus-tests, p-cpe:/a:canonical:ubuntu_linux:dbus-user-session, p-cpe:/a:canonical:ubuntu_linux:dbus-x11, p-cpe:/a:canonical:ubuntu_linux:libdbus-1-3, p-cpe:/a:canonical:ubuntu_linux:libdbus-1-dev

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/9/2022

Vulnerability Publication Date: 2/15/2021

Reference Information

CVE: CVE-2020-35512

USN: 5244-2