Xen Project Speculative Execution Side Channel Vulnerability (XSA-273) (Foreshadow)

Medium Nessus Plugin ID 112159

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 a speculative execution side channel attack known as L1 Terminal Fault (L1TF). An attacker who successfully exploited L1TF may be able to read privileged data across trust boundaries.

Note that Nessus has checked the changeset versions based on the xen.git change log. Nessus did not check guest hardware configurations or if patches were applied manually to the source code before a recompile and reinstall.

Solution

Apply the appropriate patch according to the vendor advisory.

See Also

http://xenbits.xen.org/xsa/advisory-273.html

https://xenbits.xen.org/gitweb/?p=xen.git;a=summary

Plugin Details

Severity: Medium

ID: 112159

File Name: xen_server_XSA-273.nasl

Version: 1.3

Type: local

Family: Misc.

Published: 2018/08/28

Modified: 2018/10/31

Dependencies: 78089

Risk Information

Risk Factor: Medium

CVSS Score Source: manual

CVSS Score Rationale: Nvd score unavailable. information disclosure vulnerability.

CVSS v2.0

Base Score: 4.9

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

CVSS v3.0

Base Score: 7.1

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

Vulnerability Information

CPE: cpe:/o:xen:xen

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

Patch Publication Date: 2018/08/14

Vulnerability Publication Date: 2018/08/14

Reference Information

CVE: CVE-2018-3620, CVE-2018-3646

BID: 105080

IAVB: 2018-B-0111