Detections
Analytics

Oracle Linux 8 : systemd (ELSA-2020-1794)

high Nessus Plugin ID 180927

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Synopsis

The remote Oracle Linux host is missing one or more security updates.

Description

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-1794 advisory.

 - It was discovered that a systemd service that uses DynamicUser property can create a SUID/SGID binary that would be allowed to run as the transient service UID/GID even after the service is terminated. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the UID/GID will be recycled. (CVE-2019-3843)

 - It was discovered that a systemd service that uses DynamicUser property can get new privileges through the execution of SUID binaries, which would allow to create binaries owned by the service transient group with the setgid bit set. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the GID will be recycled. (CVE-2019-3844)

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

Solution

Update the affected packages.

See Also

https://linux.oracle.com/errata/ELSA-2020-1794.html

Plugin Details

Severity: High

ID: 180927

File Name: oraclelinux_ELSA-2020-1794.nasl

Version: 1.0

Type: local

Agent: unix

Published: 9/7/2023

Updated: 9/7/2023

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.6

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

CVSS Score Source: CVE-2019-3844

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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

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

Vulnerability Information

CPE: cpe:/o:oracle:linux:8, p-cpe:/a:oracle:linux:systemd, p-cpe:/a:oracle:linux:systemd-container, p-cpe:/a:oracle:linux:systemd-devel, p-cpe:/a:oracle:linux:systemd-journal-remote, p-cpe:/a:oracle:linux:systemd-libs, p-cpe:/a:oracle:linux:systemd-pam, p-cpe:/a:oracle:linux:systemd-tests, p-cpe:/a:oracle:linux:systemd-udev

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/OracleLinux

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/5/2020

Vulnerability Publication Date: 4/25/2019

Reference Information

CVE: CVE-2019-3843, CVE-2019-3844