PT-2018-3389 · Intel+1 · Xen+1

Sergey Dyasli · Published 2018-10-31 · Updated 2024-06-15 · CVE-2018-18883

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Xen versions 4.9.x through 4.11.x

Description: An issue in Xen on Intel x86 platforms allows x86 HVM and PVH guests to cause a host OS denial of service or possibly have other impact due to improper restriction of nested VT-x, leading to a NULL pointer dereference. The vulnerability can be exploited to cause a denial of service.

Recommendations: For Xen versions 4.9.x through 4.11.x, consider restricting the use of nested VT-x to minimize the risk of exploitation until a patch is available. As a temporary workaround, limiting the functionality of x86 HVM and PVH guests may help reduce the risk of a denial of service. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2020-00736

CVE-2018-18883

OPENSUSE-SU-2018_4111-1

OPENSUSE-SU-2018_4304-1

OPENSUSE-SU-2024:11520-1

SUSE-SU-2018:4070-1

SUSE-SU-2018:4300-1

SUSE-SU-2019:0003-1

Affected Products

Suse

Xen

References · 138

• https://osv.dev/vulnerability/openSUSE-SU-2024:11520-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-18883 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2018-18883 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-18883 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2018-18883 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2018:4300-1 · Vendor Advisory
• https://xenbits.xen.org/xsa/advisory-278.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-18883 · Security Note
• https://osv.dev/vulnerability/CVE-2018-18883 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2019:0003-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2018-18883 · Security Note
• https://bdu.fstec.ru/vul/2020-00736 · Security Note
• https://wiki.astralinux.ru/pages/viewpage.action?pageId=57444186 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-18883 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2018:4070-1 · Vendor Advisory