CVE-2016-9922 : The cirrus_do_copy function in hw/display/cirrus

The cirrus_do_copy function in hw/display/cirrus_vga.c in QEMU (aka Quick Emulator), when cirrus graphics mode is VGA, allows local guest OS privileged users to cause a denial of service (divide-by-zero error and QEMU process crash) via vectors involving blit pitch values.

Published 2017-03-27 15:59:00

Updated 2023-02-13 04:50:18

Source Red Hat, Inc.

View at NVD, CVE.org

Vulnerability category: Denial of service

Products affected by CVE-2016-9922

Qemu » Qemu
Versions up to, including, (<=) 2.7.1
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
Matching versions
Qemu » Qemu » Version: 2.8.0 Update RC0
cpe:2.3:a:qemu:qemu:2.8.0:rc0:*:*:*:*:*:*
Matching versions
Qemu » Qemu » Version: 2.8.0 Update RC1
cpe:2.3:a:qemu:qemu:2.8.0:rc1:*:*:*:*:*:*
Matching versions
Qemu » Qemu » Version: 2.8.0 Update RC2
cpe:2.3:a:qemu:qemu:2.8.0:rc2:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2016-9922

EPSS FAQ

0.06%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 25 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2016-9922

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
2.1	LOW	AV:L/AC:L/Au:N/C:N/I:N/A:P	3.9	2.9	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
5.5	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	1.8	3.6	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2016-9922

CWE-369 Divide By Zero

The product divides a value by zero.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2016-9922

http://www.securityfocus.com/bid/94803

QEMU Divide By Zero Multiple Denial of Service Vulnerabilities
Third Party Advisory;VDB Entry

CVEs referencing this url
https://access.redhat.com/errata/RHSA-2017:2392

RHSA-2017:2392 - Security Advisory - Red Hat Customer Portal
Third Party Advisory

CVEs referencing this url
https://lists.gnu.org/archive/html/qemu-devel/2016-12/msg00442.html

[Qemu-devel] [PULL 4/4] display: cirrus: check vga bits per pixel(bpp) v
Patch;Vendor Advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html

[SECURITY] [DLA 1497-1] qemu security update
Third Party Advisory

CVEs referencing this url
http://www.openwall.com/lists/oss-security/2016/12/09/1

oss-security - Re: CVE request Qemu: display: cirrus_vga: a divide by zero in cirrus_do_copy
Mailing List;Patch;Third Party Advisory

CVEs referencing this url
https://access.redhat.com/errata/RHSA-2017:2408

RHSA-2017:2408 - Security Advisory - Red Hat Customer Portal
Third Party Advisory

CVEs referencing this url
https://bugzilla.redhat.com/show_bug.cgi?id=1334398

1334398 – (CVE-2016-9921, CVE-2016-9922) CVE-2016-9921 CVE-2016-9922 Qemu: display: cirrus_vga: a divide by zero in cirrus_do_copy
Issue Tracking;Patch
http://git.qemu-project.org/?p=qemu.git%3Ba=commit%3Bh=4299b90e9ba9ce5ca9024572804ba751aa1a7e70

git.qemu.org Git

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Vulnerability Details : CVE-2016-9922

Products affected by CVE-2016-9922

Exploit prediction scoring system (EPSS) score for CVE-2016-9922

CVSS scores for CVE-2016-9922

CWE ids for CVE-2016-9922

References for CVE-2016-9922