Fedora 33 : xen (2020-306b84fd07)

medium Nessus Plugin ID 141270
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VPR Score: 7.4


The remote Fedora host is missing a security update.


x86 pv: Crash when handling guest access to MSR_MISC_ENABLE [XSA-333, CVE-2020-25602] (#1881619) Missing unlock in XENMEM_acquire_resource error path [XSA-334, CVE-2020-25598] (#1881616) race when migrating timers between x86 HVM vCPU-s [XSA-336, CVE-2020-25604] (#1881618) PCI passthrough code reading back hardware registers [XSA-337, CVE-2020-25595] (#1881587) once valid event channels may not turn invalid [XSA-338, CVE-2020-25597] (#1881588) x86 pv guest kernel DoS via SYSENTER [XSA-339, CVE-2020-25596] (#1881617) Missing memory barriers when accessing/allocating an event channel [XSA-340, CVE-2020-25603] (#1881583) out of bounds event channels available to 32-bit x86 domains [XSA-342, CVE-2020-25600] (#1881582) races with evtchn_reset() [XSA-343, CVE-2020-25599] (#1881581) lack of preemption in evtchn_reset() / evtchn_destroy() [XSA-344, CVE-2020-25601] (#1881586)

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.


Update the affected xen package.

See Also


Plugin Details

Severity: Medium

ID: 141270

File Name: fedora_2020-306b84fd07.nasl

Version: 1.2

Type: local

Agent: unix

Published: 10/8/2020

Updated: 10/12/2020

Dependencies: ssh_get_info.nasl

Risk Information

Risk Factor: Medium

VPR Score: 7.4

CVSS Score Source: CVE-2020-25597

CVSS v2.0

Base Score: 6.1

Temporal Score: 4.5

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

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

CVSS v3.0

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: p-cpe:/a:fedoraproject:fedora:xen, cpe:/o:fedoraproject:fedora:33

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/27/2020

Vulnerability Publication Date: 9/23/2020

Reference Information

CVE: CVE-2020-25595, CVE-2020-25596, CVE-2020-25597, CVE-2020-25598, CVE-2020-25599, CVE-2020-25600, CVE-2020-25601, CVE-2020-25602, CVE-2020-25603, CVE-2020-25604