PT-2019-5143 · Xen+1 · Xen+1

Andy Lutomirski · Published 2019-10-07 · Updated 2023-02-03 · CVE-2019-17347

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Xen versions prior to 4.12

Description The issue allows x86 PV guest OS users to cause a denial of service or gain privileges because a guest can manipulate its virtualised %cr4 in a way that is incompatible with Linux. This is related to an insufficient input validation mechanism in the Xen hypervisor, which can be exploited to gain unauthorized access to confidential data, cause a denial of service, and impact data integrity.

Recommendations For Xen versions prior to 4.12, update to a version 4.12 or later to resolve the issue. As a temporary workaround, consider restricting access to the virtualised %cr4 register to minimize the risk of exploitation.

Fix

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2020-01810

CVE-2019-17347

DSA-4602-1

SUSE-RU-2019:2767-1

SUSE-SU-2019:14199-1

SUSE-SU-2019:2753-1

SUSE-SU-2019:2769-1

SUSE-SU-2019:2783-1

SUSE-SU-2019_14199-1

SUSE-SU-2020:0388-1

Affected Products

Suse

Xen

References · 104

• https://bdu.fstec.ru/vul/2020-01810 · Security Note
• https://osv.dev/vulnerability/SUSE-RU-2019:2767-1 · Vendor Advisory
• http://xenbits.xen.org/xsa/advisory-293.html · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se16-bulletin-20200327SE16 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2019:2753-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-17347 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2019:14199-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2019-17347 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-17347 · Vendor Advisory
• https://debian.org/security/2020/dsa-4602 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-17347 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-17347 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2019-17347 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4602-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2019:2769-1 · Vendor Advisory