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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2020-15563 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00024.html Mailing List  Third Party Advisory 
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00024.html Mailing List  Third Party Advisory 
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00031.html Mailing List  Third Party Advisory 
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00031.html Mailing List  Third Party Advisory 
http://www.openwall.com/lists/oss-security/2020/07/07/3 Mailing List  Third Party Advisory 
http://www.openwall.com/lists/oss-security/2020/07/07/3 Mailing List  Third Party Advisory 
http://xenbits.xen.org/xsa/advisory-319.html Patch  Vendor Advisory 
http://xenbits.xen.org/xsa/advisory-319.html Patch  Vendor Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MXESCOVI7AVRNC7HEAMFM7PMEO6D3AUH/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MXESCOVI7AVRNC7HEAMFM7PMEO6D3AUH/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VB3QJJZV23Z2IDYEMIHELWYSQBUEW6JP/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VB3QJJZV23Z2IDYEMIHELWYSQBUEW6JP/
https://security.gentoo.org/glsa/202007-02 Third Party Advisory 
https://security.gentoo.org/glsa/202007-02 Third Party Advisory 
https://www.debian.org/security/2020/dsa-4723 Third Party Advisory 
https://www.debian.org/security/2020/dsa-4723 Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer cwe source acceptance level NIST  

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Change History

14 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-15563
NVD Published Date:
07/07/2020
NVD Last Modified:
11/21/2024
Source:
MITRE