CVE-2016-9921
Qemu: display: cirrus_vga: a divide by zero in cirrus_do_copy
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
Quick emulator (Qemu) construido con el soporte Cirrus CLGD 54xx VGA Emulator es vulnerable a un problema de división por cero. Podría ocurrir mientras se copian datos VGA cuando el modo de gráficos cirrus estaba configurado para ser VGA. Un usuario privilegiado dentro del huésped podría usar esta falla para bloquear la instancia del proceso Qemu en el host, resultando en DoS.
KVM is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines that use KVM in environments managed by Red Hat products. The following packages have been upgraded to a later upstream version: qemu-kvm-rhev. Security Fix: A stack buffer overflow flaw was found in the Quick Emulator built with the Network Block Device client support. The flaw could occur while processing server's response to a 'NBD_OPT_LIST' request. A malicious NBD server could use this issue to crash a remote NBD client resulting in DoS or potentially execute arbitrary code on client host with privileges of the QEMU process.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2016-12-08 CVE Reserved
- 2016-12-23 CVE Published
- 2024-08-06 CVE Updated
- 2025-03-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-369: Divide By Zero
CAPEC
References (8)
| URL | Tag | Source |
|---|---|---|
| http://www.securityfocus.com/bid/94803 | Third Party Advisory | |
| https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html | Mailing List |
|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2016/12/09/1 | 2023-02-13 |
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2017:2392 | 2023-02-13 | |
| https://access.redhat.com/errata/RHSA-2017:2408 | 2023-02-13 | |
| https://security.gentoo.org/glsa/201701-49 | 2023-02-13 | |
| https://access.redhat.com/security/cve/CVE-2016-9921 | 2017-08-01 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1334398 | 2017-08-01 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Redhat Search vendor "Redhat" | Virtualization Search vendor "Redhat" for product "Virtualization" | 4.0 Search vendor "Redhat" for product "Virtualization" and version "4.0" | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0" | - |
Safe
|
| Qemu Search vendor "Qemu" | Qemu Search vendor "Qemu" for product "Qemu" | <= 2.7.1 Search vendor "Qemu" for product "Qemu" and version " <= 2.7.1" | - |
Affected
| ||||||
| Qemu Search vendor "Qemu" | Qemu Search vendor "Qemu" for product "Qemu" | 2.8.0 Search vendor "Qemu" for product "Qemu" and version "2.8.0" | rc0 |
Affected
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| Qemu Search vendor "Qemu" | Qemu Search vendor "Qemu" for product "Qemu" | 2.8.0 Search vendor "Qemu" for product "Qemu" and version "2.8.0" | rc1 |
Affected
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| Qemu Search vendor "Qemu" | Qemu Search vendor "Qemu" for product "Qemu" | 2.8.0 Search vendor "Qemu" for product "Qemu" and version "2.8.0" | rc2 |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0" | - |
Affected
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| Redhat Search vendor "Redhat" | Openstack Search vendor "Redhat" for product "Openstack" | 6.0 Search vendor "Redhat" for product "Openstack" and version "6.0" | - |
Affected
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| Redhat Search vendor "Redhat" | Openstack Search vendor "Redhat" for product "Openstack" | 7.0 Search vendor "Redhat" for product "Openstack" and version "7.0" | - |
Affected
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| Redhat Search vendor "Redhat" | Openstack Search vendor "Redhat" for product "Openstack" | 8 Search vendor "Redhat" for product "Openstack" and version "8" | - |
Affected
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| Redhat Search vendor "Redhat" | Openstack Search vendor "Redhat" for product "Openstack" | 9 Search vendor "Redhat" for product "Openstack" and version "9" | - |
Affected
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| Redhat Search vendor "Redhat" | Openstack Search vendor "Redhat" for product "Openstack" | 10 Search vendor "Redhat" for product "Openstack" and version "10" | - |
Affected
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| Redhat Search vendor "Redhat" | Openstack Search vendor "Redhat" for product "Openstack" | 11 Search vendor "Redhat" for product "Openstack" and version "11" | - |
Affected
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