SUSE SLES15 Security Update : xen (SUSE-SU-2023:4183-1)

high Nessus Plugin ID 183860



The remote SUSE host is missing one or more security updates.


The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:4183-1 advisory.

- The vulnerability exists due to a reachable assertion when handling negative quota values in C Xenstored.
A malicious guest can craft a transaction that forces C Xenstored to check quota value and perform a denial of service attack. (CVE-2023-34323)

- The vulnerability exists due to insufficient validation of user-supplied input in libfsimage. A remote guest can use pygrab to trigger stack-based buffer overflow and execute arbitrary code on the host system (CVE-2023-34325)

- The vulnerability exists due to missing IOMMU TLB flushing on x86/AMD systems. A malicious guest can access memory not owned by the guest and escalate privileges on the system. (CVE-2023-34326)

- The vulnerability exists due to improper validation of guest state when using Debug Masks in HVM vCPU. A malicious guest can perform a denial of service (DoS) attack against the guest OS. (CVE-2023-34327)

- The vulnerability exists due to improper validation of guest state in PV vCPU. A malicious guest place a breakpoint over the live GDT and perform a denial of service (DoS) attack against the host.

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


Update the affected packages.

See Also

Plugin Details

Severity: High

ID: 183860

File Name: suse_SU-2023-4183-1.nasl

Version: 1.3

Type: local

Agent: unix

Published: 10/25/2023

Updated: 1/15/2024

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

Risk Information


Risk Factor: Medium

Score: 5.9


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-2023-34326


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: p-cpe:/a:novell:suse_linux:xen, p-cpe:/a:novell:suse_linux:xen-devel, p-cpe:/a:novell:suse_linux:xen-libs, p-cpe:/a:novell:suse_linux:xen-tools, p-cpe:/a:novell:suse_linux:xen-tools-domu, p-cpe:/a:novell:suse_linux:xen-tools-xendomains-wait-disk, 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: 10/24/2023

Vulnerability Publication Date: 10/12/2023

Reference Information

CVE: CVE-2023-34323, CVE-2023-34325, CVE-2023-34326, CVE-2023-34327, CVE-2023-34328

IAVB: 2023-B-0081-S

SuSE: SUSE-SU-2023:4183-1