SUSE SLES15 Security Update : xen (SUSE-SU-2022:1300-1)

high Nessus Plugin ID 160092

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Synopsis

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

Description

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:1300-1 advisory.

- LFENCE/JMP (mitigation V2-2) may not sufficiently mitigate CVE-2017-5715 on some AMD CPUs.
(CVE-2021-26401)

- Non-transparent sharing of branch predictor selectors between contexts in some Intel(R) Processors may allow an authorized user to potentially enable information disclosure via local access. (CVE-2022-0001)

- Non-transparent sharing of branch predictor within a context in some Intel(R) Processors may allow an authorized user to potentially enable information disclosure via local access. (CVE-2022-0002)

- Racy interactions between dirty vram tracking and paging log dirty hypercalls Activation of log dirty mode done by XEN_DMOP_track_dirty_vram (was named HVMOP_track_dirty_vram before Xen 4.9) is racy with ongoing log dirty hypercalls. A suitably timed call to XEN_DMOP_track_dirty_vram can enable log dirty while another CPU is still in the process of tearing down the structures related to a previously enabled log dirty mode (XEN_DOMCTL_SHADOW_OP_OFF). This is due to lack of mutually exclusive locking between both operations and can lead to entries being added in already freed slots, resulting in a memory leak.
(CVE-2022-26356)

- race in VT-d domain ID cleanup Xen domain IDs are up to 15 bits wide. VT-d hardware may allow for only less than 15 bits to hold a domain ID associating a physical device with a particular domain. Therefore internally Xen domain IDs are mapped to the smaller value range. The cleaning up of the housekeeping structures has a race, allowing for VT-d domain IDs to be leaked and flushes to be bypassed.
(CVE-2022-26357)

- IOMMU: RMRR (VT-d) and unity map (AMD-Vi) handling issues T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, RMRR) for Intel VT-d or Unity Mapping ranges for AMD-Vi. These are typically used for platform tasks such as legacy USB emulation. Since the precise purpose of these regions is unknown, once a device associated with such a region is active, the mappings of these regions need to remain continuouly accessible by the device. This requirement has been violated. Subsequent DMA or interrupts from the device may have unpredictable behaviour, ranging from IOMMU faults to memory corruption. (CVE-2022-26358, CVE-2022-26359, CVE-2022-26360, CVE-2022-26361)

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://bugzilla.suse.com/1194267

https://bugzilla.suse.com/1196915

https://bugzilla.suse.com/1197423

https://bugzilla.suse.com/1197425

https://bugzilla.suse.com/1197426

https://www.suse.com/security/cve/CVE-2021-26401

https://www.suse.com/security/cve/CVE-2022-0001

https://www.suse.com/security/cve/CVE-2022-0002

https://www.suse.com/security/cve/CVE-2022-26356

https://www.suse.com/security/cve/CVE-2022-26357

https://www.suse.com/security/cve/CVE-2022-26358

https://www.suse.com/security/cve/CVE-2022-26359

https://www.suse.com/security/cve/CVE-2022-26360

https://www.suse.com/security/cve/CVE-2022-26361

http://www.nessus.org/u?e593675a

Plugin Details

Severity: High

ID: 160092

File Name: suse_SU-2022-1300-1.nasl

Version: 1.6

Type: local

Agent: unix

Published: 4/23/2022

Updated: 7/13/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.2

Temporal Score: 4.6

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

CVSS Score Source: CVE-2022-26357

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

CVSS Score Source: CVE-2022-26361

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: 4/22/2022

Vulnerability Publication Date: 3/11/2022

Reference Information

CVE: CVE-2021-26401, CVE-2022-0001, CVE-2022-0002, CVE-2022-26356, CVE-2022-26357, CVE-2022-26358, CVE-2022-26359, CVE-2022-26360, CVE-2022-26361

SuSE: SUSE-SU-2022:1300-1