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Alpine: xen: security update to 4.11.3-r0

medium Tenable Cloud Security Plugin ID 407750

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - An issue was discovered in Xen through 4.12.x allowing attackers to gain host OS privileges via DMA in a
 situation where an untrusted domain has access to a physical device (and assignable-add is not used),
 because of an incomplete fix for CVE-2019-18424. XSA-302 relies on the use of libxl's "assignable-add"
 feature to prepare devices to be assigned to untrusted guests. Unfortunately, this is not considered a
 strictly required step for device assignment. The PCI passthrough documentation on the wiki describes
 alternate ways of preparing devices for assignment, and libvirt uses its own ways as well. Hosts where
 these "alternate" methods are used will still leave the system in a vulnerable state after the device
 comes back from a guest. An untrusted domain with access to a physical device can DMA into host memory,
 leading to privilege escalation. Only systems where guests are given direct access to physical devices
 capable of DMA (PCI pass-through) are vulnerable. Systems which do not use PCI pass-through are not
 vulnerable. (CVE-2019-19579)

See Also

https://security.alpinelinux.org/vuln/CVE-2019-19579

Plugin Details

Severity: Medium

ID: 407750

Version: Revision 1.31

Type: Local

Published: 10/31/2023

Updated: 7/2/2026

Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.12

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2019-19579

CVSS v3

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 11/7/2019

Reference Information

CVE: CVE-2019-19579

IAVB: 2019-B-0084-S