SUSE SLES11 Security Update : xen (SUSE-SU-2020:14557-1)

high Nessus Plugin ID 150513
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

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

Description

The remote SUSE Linux SLES11 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2020:14557-1 advisory.

- A reachable assertion issue was found in the USB EHCI emulation code of QEMU. It could occur while processing USB requests due to missing handling of DMA memory map failure. A malicious privileged user within the guest may abuse this flaw to send bogus USB requests and crash the QEMU process on the host, resulting in a denial of service. (CVE-2020-25723)

- An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cause a denial of service (data corruption), cause a data leak, or possibly gain privileges because an AMD IOMMU page-table entry can be half-updated. (CVE-2020-27670)

- An issue was discovered in Xen through 4.14.x allowing x86 HVM and PVH guest OS users to cause a denial of service (data corruption), cause a data leak, or possibly gain privileges because coalescing of per-page IOMMU TLB flushes is mishandled. (CVE-2020-27671)

- An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cause a host OS denial of service, achieve data corruption, or possibly gain privileges by exploiting a race condition that leads to a use-after-free involving 2MiB and 1GiB superpages. (CVE-2020-27672)

- An issue was discovered in Xen through 4.14.x allowing x86 PV guest OS users to gain guest OS privileges by modifying kernel memory contents, because invalidation of TLB entries is mishandled during use of an INVLPG-like attack technique. (CVE-2020-27674)

- Xen through 4.14.x allows guest OS administrators to obtain sensitive information (such as AES keys from outside the guest) via a side-channel attack on a power/energy monitoring interface, aka a Platypus attack. NOTE: there is only one logically independent fix: to change the access control for each such interface in Xen. (CVE-2020-28368)

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 packages.

See Also

https://bugzilla.suse.com/1177409

https://bugzilla.suse.com/1177412

https://bugzilla.suse.com/1177413

https://bugzilla.suse.com/1177414

https://bugzilla.suse.com/1178591

https://bugzilla.suse.com/1178935

https://bugzilla.suse.com/1178963

http://www.nessus.org/u?1dcc8329

https://www.suse.com/security/cve/CVE-2020-25723

https://www.suse.com/security/cve/CVE-2020-27670

https://www.suse.com/security/cve/CVE-2020-27671

https://www.suse.com/security/cve/CVE-2020-27672

https://www.suse.com/security/cve/CVE-2020-27674

https://www.suse.com/security/cve/CVE-2020-28368

Plugin Details

Severity: High

ID: 150513

File Name: suse_SU-2020-14557-1.nasl

Version: 1.2

Type: local

Agent: unix

Published: 6/10/2021

Updated: 6/10/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2020-27672

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.1

Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7

Temporal Score: 6.1

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

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:xen, p-cpe:/a:novell:suse_linux:xen-doc-html, p-cpe:/a:novell:suse_linux:xen-kmp-default, p-cpe:/a:novell:suse_linux:xen-kmp-pae, p-cpe:/a:novell:suse_linux:xen-libs, p-cpe:/a:novell:suse_linux:xen-libs-32bit, p-cpe:/a:novell:suse_linux:xen-tools, p-cpe:/a:novell:suse_linux:xen-tools-domU, cpe:/o:novell:suse_linux:11

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: 12/8/2020

Vulnerability Publication Date: 9/24/2020

Reference Information

CVE: CVE-2020-25723, CVE-2020-27670, CVE-2020-27671, CVE-2020-27672, CVE-2020-27674, CVE-2020-28368

SuSE: SUSE-SU-2020:14557-1

IAVB: 2020-B-0075, 2020-B-0056-S, 2020-B-0066