CVE-2020-11741

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

14/04/2020

Last modified:

07/11/2023

Description

An issue was discovered in xenoprof in Xen through 4.13.x, allowing guest OS users (with active profiling) to obtain sensitive information about other guests, cause a denial of service, or possibly gain privileges. For guests for which "active" profiling was enabled by the administrator, the xenoprof code uses the standard Xen shared ring structure. Unfortunately, this code did not treat the guest as a potential adversary: it trusts the guest not to modify buffer size information or modify head / tail pointers in unexpected ways. This can crash the host (DoS). Privilege escalation cannot be ruled out.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

8.80

Severity 3.x

HIGH

Vector 2.0

AV:L/AC:M/Au:N/C:C/I:C/A:C CVSS v2.0 Severity and Metrics:

Base Score: 6.90 MEDIUM
Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C

Attack Vector (AV): Local
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): Complete
Integrity (I): Complete
Availability (A): Complete

Base Score 2.0

6.90

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:xen:xen::::::::		4.13.0 (including)
cpe:2.3:o:xen:xen:4.13.0:rc1::::::
cpe:2.3:o:xen:xen:4.13.0:rc2::::::
cpe:2.3:o:fedoraproject:fedora:30:::::::*
cpe:2.3:o:fedoraproject:fedora:31:::::::*
cpe:2.3:o:fedoraproject:fedora:32:::::::*
cpe:2.3:o:debian:debian_linux:10.0:::::::*
cpe:2.3:o:opensuse:leap:15.1:::::::*

To consult the complete list of CPE names with products and versions, see this page

CPE	From	Up to
cpe:2.3:o:xen:xen::::::::		4.13.0 (including)
cpe:2.3:o:xen:xen:4.13.0:rc1::::::
cpe:2.3:o:xen:xen:4.13.0:rc2::::::
cpe:2.3:o:fedoraproject:fedora:30:::::::*
cpe:2.3:o:fedoraproject:fedora:31:::::::*
cpe:2.3:o:fedoraproject:fedora:32:::::::*
cpe:2.3:o:debian:debian_linux:10.0:::::::*
cpe:2.3:o:opensuse:leap:15.1:::::::*

CVE-2020-11741

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools