CVE-2016-9921
medium
CVSS v3
6.5
CVSS v2
2.1
VIR risk
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.
Predictions
Exploit likelihood
65%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2016-9921
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2016-9921.html
Vendor advisory: secalert@redhat.com — http://www.openwall.com/lists/oss-security/2016/12/09/1
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | 8.0 | affected | |
| rhel | 7.0 | not-affected | |
| debian | bookworm | fixed | 1:2.8+dfsg-1 |
| debian | bullseye | fixed | 1:2.8+dfsg-1 |
| debian | forky | fixed | 1:2.8+dfsg-1 |
| debian | sid | fixed | 1:2.8+dfsg-1 |
| debian | trixie | fixed | 1:2.8+dfsg-1 |
References
- http://www.openwall.com/lists/oss-security/2016/12/09/1
- http://www.securityfocus.com/bid/94803
- https://access.redhat.com/errata/RHSA-2017:2392
- https://access.redhat.com/errata/RHSA-2017:2408
- https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html
- https://security.gentoo.org/glsa/201701-49
- https://www.suse.com/security/cve/CVE-2016-9921.html
- https://security-tracker.debian.org/tracker/CVE-2016-9921
CWEs
CWE-369
Verify integrity in audit chain (admin only). AS-IS.