6.5
MEDIUM
CVE-2020-15563
Xen x86 HVM Guest Hypervisor Crash Vulnerability
Description

An issue was discovered in Xen through 4.13.x, allowing x86 HVM guest OS users to cause a hypervisor crash. An inverted conditional in x86 HVM guests' dirty video RAM tracking code allows such guests to make Xen de-reference a pointer guaranteed to point at unmapped space. A malicious or buggy HVM guest may cause the hypervisor to crash, resulting in Denial of Service (DoS) affecting the entire host. Xen versions from 4.8 onwards are affected. Xen versions 4.7 and earlier are not affected. Only x86 systems are affected. Arm systems are not affected. Only x86 HVM guests using shadow paging can leverage the vulnerability. In addition, there needs to be an entity actively monitoring a guest's video frame buffer (typically for display purposes) in order for such a guest to be able to leverage the vulnerability. x86 PV guests, as well as x86 HVM guests using hardware assisted paging (HAP), cannot leverage the vulnerability.

INFO

Published Date :

July 7, 2020, 1:15 p.m.

Last Modified :

Nov. 7, 2023, 3:17 a.m.

Remotely Exploitable :

No

Impact Score :

4.0

Exploitability Score :

2.0
Affected Products

The following products are affected by CVE-2020-15563 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Fedoraproject fedora
1 Debian debian_linux
1 Opensuse leap
1 Xen xen

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-15563 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-15563 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VB3QJJZV23Z2IDYEMIHELWYSQBUEW6JP/ [No types assigned]
    Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MXESCOVI7AVRNC7HEAMFM7PMEO6D3AUH/ [No types assigned]
    Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/VB3QJJZV23Z2IDYEMIHELWYSQBUEW6JP/
    Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/MXESCOVI7AVRNC7HEAMFM7PMEO6D3AUH/
  • Modified Analysis by [email protected]

    May. 03, 2022

    Action Type Old Value New Value
    Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00024.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00024.html Mailing List, Third Party Advisory
    Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00031.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00031.html Mailing List, Third Party Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/MXESCOVI7AVRNC7HEAMFM7PMEO6D3AUH/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/MXESCOVI7AVRNC7HEAMFM7PMEO6D3AUH/ Mailing List, Third Party Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/VB3QJJZV23Z2IDYEMIHELWYSQBUEW6JP/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/VB3QJJZV23Z2IDYEMIHELWYSQBUEW6JP/ Mailing List, Third Party Advisory
    Changed Reference Type https://security.gentoo.org/glsa/202007-02 No Types Assigned https://security.gentoo.org/glsa/202007-02 Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
  • CWE Remap by [email protected]

    Jul. 21, 2021

    Action Type Old Value New Value
    Changed CWE CWE-20 CWE-119
  • CPE Deprecation Remap by [email protected]

    Aug. 18, 2020

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10:*:*:*:*:*:*:* OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Jul. 27, 2020

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/202007-02 [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 23, 2020

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/MXESCOVI7AVRNC7HEAMFM7PMEO6D3AUH/ [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 18, 2020

    Action Type Old Value New Value
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00031.html [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 16, 2020

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/VB3QJJZV23Z2IDYEMIHELWYSQBUEW6JP/ [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 15, 2020

    Action Type Old Value New Value
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00024.html [No Types Assigned]
  • Initial Analysis by [email protected]

    Jul. 15, 2020

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:N/I:N/A:C)
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
    Changed Reference Type http://www.openwall.com/lists/oss-security/2020/07/07/3 No Types Assigned http://www.openwall.com/lists/oss-security/2020/07/07/3 Mailing List, Third Party Advisory
    Changed Reference Type http://xenbits.xen.org/xsa/advisory-319.html No Types Assigned http://xenbits.xen.org/xsa/advisory-319.html Patch, Vendor Advisory
    Changed Reference Type https://www.debian.org/security/2020/dsa-4723 No Types Assigned https://www.debian.org/security/2020/dsa-4723 Third Party Advisory
    Added CWE NIST CWE-20
    Added CPE Configuration OR *cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:* versions from (including) 4.8.0 up to (including) 4.13.1
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Jul. 13, 2020

    Action Type Old Value New Value
    Added Reference https://www.debian.org/security/2020/dsa-4723 [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 07, 2020

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2020/07/07/3 [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.04 }} 0.00%

score

0.12065

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability