CVE-2020-15563
CVSS V2 Medium 4.7
CVSS V3 Medium 6.5
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.
Overview
- CVE ID
- CVE-2020-15563
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2020-07-07T13:15:09
- Last Modified Date
- 2022-05-03T13:59:55
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:* | 1 | OR | 4.8.0 | 4.13.1 |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:M/Au:N/C:N/I:N/A:C
- Access Vector
- LOCAL
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- COMPLETE
- Base Score
- 4.7
- Severity
- MEDIUM
- Exploitability Score
- 3.4
- Impact Score
- 6.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- Attack Vector
- LOCAL
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- CHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 6.5
- Base Severity
- MEDIUM
- Exploitability Score
- 2
- Impact Score
- 4
References
| Reference URL | Reference Tags |
|---|---|
| http://xenbits.xen.org/xsa/advisory-319.html | Patch Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2020/07/07/3 | Mailing List Third Party Advisory |
| https://www.debian.org/security/2020/dsa-4723 | Third Party Advisory |
| http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00024.html | Mailing List Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VB3QJJZV23Z2IDYEMIHELWYSQBUEW6JP/ | Mailing List Third Party Advisory |
| http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00031.html | Mailing List Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MXESCOVI7AVRNC7HEAMFM7PMEO6D3AUH/ | Mailing List Third Party Advisory |
| https://security.gentoo.org/glsa/202007-02 | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2020-15563 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15563 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-08 06:20:02 | Added to TrackCVE | |||
| 2022-12-04 19:13:11 | 2020-07-07T13:15Z | 2020-07-07T13:15:09 | CVE Published Date | updated |
| 2022-12-04 19:13:11 | 2022-05-03T13:59:55 | CVE Modified Date | updated | |
| 2022-12-04 19:13:11 | Analyzed | Vulnerability Status | updated |