Xen Information Disclosure Vulnerability (XSA-305)

medium Nessus Plugin ID 134174

Synopsis

The remote Xen hypervisor installation is missing a security update.

Description

According to its self-reported version number, the Xen Hypervisor installed on the remote host is affected by an information disclosure vulnerability. A TSX Asynchronous Abort condition exists on some CPUs utilizing speculative execution. An authenticated, local attacker can exploit this to potentially enable information disclosure via a side channel.

Solution

Apply the appropriate patch according to the vendor advisory.

See Also

http://www.nessus.org/u?49587fdf

Plugin Details

Severity: Medium

ID: 134174

File Name: xen_server_XSA-305.nasl

Version: 1.2

Type: local

Family: Misc.

Published: 3/2/2020

Updated: 3/3/2020

Configuration: Enable paranoid mode

Risk Information

CVSS Score Source: CVE-2019-11135

VPR

Risk Factor: Medium

Score: 6

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

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

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

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: cpe:/o:xen:xen

Required KB Items: installed_sw/Xen Hypervisor, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 11/12/2019

Vulnerability Publication Date: 11/12/2019

Reference Information

CVE: CVE-2019-11135