CVE-2016-9921
CVSS V2 Low 2.1
CVSS V3 Medium 6.5
Description
Quick emulator (Qemu) built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to a divide by zero issue. It could occur while copying VGA data when cirrus graphics mode was set to be VGA. A privileged user inside guest could use this flaw to crash the Qemu process instance on the host, resulting in DoS.
Overview
- CVE ID
- CVE-2016-9921
- Assigner
- secalert@redhat.com
- Vulnerability Status
- Modified
- Published Version
- 2016-12-23T22:59:00
- Last Modified Date
- 2023-02-13T04:50:17
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* | 1 | OR | 2.7.1 | |
| cpe:2.3:a:qemu:qemu:2.8.0:rc0:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:qemu:qemu:2.8.0:rc1:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:qemu:qemu:2.8.0:rc2:*:*:*:*:*:* | 1 | OR | ||
| AND | ||||
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 1 | OR | ||
| AND | ||||
| cpe:2.3:a:redhat:openstack:6.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:redhat:openstack:7.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:redhat:openstack:8:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:redhat:openstack:9:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:redhat:openstack:11:*:*:*:*:*:*:* | 1 | OR | ||
| AND | ||||
| cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:N/I:N/A:P
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 2.1
- Severity
- LOW
- Exploitability Score
- 3.9
- Impact Score
- 2.9
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://www.openwall.com/lists/oss-security/2016/12/09/1 | Mailing List Patch Third Party Advisory |
| http://www.securityfocus.com/bid/94803 | Third Party Advisory VDB Entry |
| https://access.redhat.com/errata/RHSA-2017:2392 | Third Party Advisory |
| https://access.redhat.com/errata/RHSA-2017:2408 | Third Party Advisory |
| https://access.redhat.com/security/cve/CVE-2016-9921 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1334398 | |
| https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html | Mailing List Third Party Advisory |
| https://security.gentoo.org/glsa/201701-49 | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2016-9921 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9921 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:58:24 | Added to TrackCVE | |||
| 2022-12-02 12:35:20 | 2016-12-23T22:59Z | 2016-12-23T22:59:00 | CVE Published Date | updated |
| 2022-12-02 12:35:20 | 2021-08-04T17:15:35 | CVE Modified Date | updated | |
| 2022-12-02 12:35:20 | Analyzed | Vulnerability Status | updated | |
| 2023-02-02 16:05:53 | 2023-02-02T15:17:15 | CVE Modified Date | updated | |
| 2023-02-02 16:05:53 | Analyzed | Modified | Vulnerability Status | updated |
| 2023-02-02 16:05:53 | Quick emulator (Qemu) built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to a divide by zero issue. It could occur while copying VGA data when cirrus graphics mode was set to be VGA. A privileged user inside guest could use this flaw to crash the Qemu process instance on the host, resulting in DoS. | CVE-2016-9921 CVE-2016-9922 Qemu: display: cirrus_vga: a divide by zero in cirrus_do_copy | Description | updated |
| 2023-02-02 16:05:54 | References | updated | ||
| 2023-02-13 05:07:28 | 2023-02-13T04:50:17 | CVE Modified Date | updated | |
| 2023-02-13 05:07:28 | CVE-2016-9921 CVE-2016-9922 Qemu: display: cirrus_vga: a divide by zero in cirrus_do_copy | Quick emulator (Qemu) built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to a divide by zero issue. It could occur while copying VGA data when cirrus graphics mode was set to be VGA. A privileged user inside guest could use this flaw to crash the Qemu process instance on the host, resulting in DoS. | Description | updated |