Detections
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Fedora 31 : xen (2020-76cf2b0f0a)

high Nessus Plugin ID 138864

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Synopsis

The remote Fedora host is missing a security update.

Description

incorrect error handling in event channel port allocation leads to DoS [XSA-317, CVE-2020-15566] (#1854465) inverted code paths in x86 dirty VRAM tracking leads to DoS [XSA-319, CVE-2020-15563] (#1854463) xen:
insufficient cache write-back under VT-d leads to DoS [XSA-321, CVE-2020-15565] (#1854467) missing alignment check in VCPUOP_register_vcpu_info leads to DoS [XSA-327, CVE-2020-15564] (#1854458) non-atomic modification of live EPT PTE leads to DoS [XSA-328, CVE-2020-15567] (#1854464)

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected xen package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2020-76cf2b0f0a

Plugin Details

Severity: High

ID: 138864

File Name: fedora_2020-76cf2b0f0a.nasl

Version: 1.5

Type: local

Agent: unix

Published: 7/23/2020

Updated: 2/29/2024

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

Risk Information

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

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

CVSS Score Source: CVE-2020-15565

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

Vulnerability Information

CPE: p-cpe:/a:fedoraproject:fedora:xen, cpe:/o:fedoraproject:fedora:31

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/23/2020

Vulnerability Publication Date: 7/7/2020

Reference Information

CVE: CVE-2020-15563, CVE-2020-15564, CVE-2020-15565, CVE-2020-15566, CVE-2020-15567

FEDORA: 2020-76cf2b0f0a

IAVB: 2020-B-0034-S