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SUSE SLES12 / SLES15 Security Update : kernel (Live Patch 36 for SLE 15 SP1) (SUSE-SU-2023:4300-1)

high Nessus Plugin ID 184105

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Synopsis

The remote SUSE host is missing a security update.

Description

The remote SUSE Linux SLES12 / SLES15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2023:4300-1 advisory.

 - A use-after-free vulnerability in the Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control) component can be exploited to achieve local privilege escalation. If a class with a link-sharing curve (i.e. with the HFSC_FSC flag set) has a parent without a link-sharing curve, then init_vf() will call vttree_insert() on the parent, but vttree_remove() will be skipped in update_vf(). This leaves a dangling pointer that can cause a use-after-free. We recommend upgrading past commit b3d26c5702c7d6c45456326e56d2ccf3f103e60f. (CVE-2023-4623)

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 kernel-livepatch-4_12_14-150100_197_131-default and / or kgraft-patch-4_12_14-122_156-default packages.

See Also

https://bugzilla.suse.com/1215440

http://www.nessus.org/u?0eb5d1ea

https://www.suse.com/security/cve/CVE-2023-4623

Plugin Details

Severity: High

ID: 184105

File Name: suse_SU-2023-4300-1.nasl

Version: 1.0

Type: local

Agent: unix

Published: 11/1/2023

Updated: 11/1/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2023-4623

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

Vulnerability Information

CPE: cpe:/o:novell:suse_linux:12, p-cpe:/a:novell:suse_linux:kernel-livepatch-4_12_14-150100_197_131-default, p-cpe:/a:novell:suse_linux:kgraft-patch-4_12_14-122_156-default, cpe:/o:novell:suse_linux:15

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 10/31/2023

Vulnerability Publication Date: 9/6/2023

Reference Information

CVE: CVE-2023-4623

SuSE: SUSE-SU-2023:4300-1