Oracle Linux 8 : Unbreakable Enterprise kernel-container (ELSA-2023-12591)

high Nessus Plugin ID 178263

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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-2023-12591 advisory.

- An issue was discovered the x86 KVM subsystem in the Linux kernel before 5.18.17. Unprivileged guest users can compromise the guest kernel because TLB flush operations are mishandled in certain KVM_VCPU_PREEMPTED situations. (CVE-2022-39189)

- An issue was discovered in the Linux kernel through 5.18.9. A type confusion bug in nft_set_elem_init (leading to a buffer overflow) could be used by a local attacker to escalate privileges, a different vulnerability than CVE-2022-32250. (The attacker can obtain root access, but must start with an unprivileged user namespace to obtain CAP_NET_ADMIN access.) This can be fixed in nft_setelem_parse_data in net/netfilter/nf_tables_api.c. (CVE-2022-34918)

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 kernel-uek-container and / or kernel-uek-container-debug packages.

Plugin Details

Severity: High

ID: 178263

File Name: oraclelinux_ELSA-2023-12591.nasl

Version: 1.1

Type: local

Agent: unix

Family: Oracle Linux Local Security Checks

Published: 7/13/2023

Updated: 7/14/2023

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

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

CVSS Score Source: CVE-2022-34918

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

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:H/RL:O/RC:C

CVSS Score Source: CVE-2022-39189

Vulnerability Information

CPE: cpe:/a:oracle:linux:8::uekr6, cpe:/o:oracle:linux:8, p-cpe:/a:oracle:linux:kernel-uek-container, p-cpe:/a:oracle:linux:kernel-uek-container-debug

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/12/2023

Vulnerability Publication Date: 7/4/2022

Exploitable With

Core Impact

Metasploit (Netfilter nft_set_elem_init Heap Overflow Privilege Escalation)

Reference Information

CVE: CVE-2022-34918, CVE-2022-39189

Detections

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