CVE-2016-8669: Divide by Zero
First published: Fri Oct 14 2016(Updated: )
The serial_update_parameters function in hw/char/serial.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (divide-by-zero error and QEMU process crash) via vectors involving a value of divider greater than baud base.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| QEMU | <=2.7.1 | |
| SUSE Linux | =42.2 | |
| Red Hat OpenStack for IBM Power | =6.0 | |
| Red Hat OpenStack for IBM Power | =7.0 | |
| Red Hat OpenStack for IBM Power | =8 | |
| Red Hat OpenStack for IBM Power | =9 | |
| Red Hat OpenStack for IBM Power | =10 | |
| Red Hat OpenStack for IBM Power | =11 | |
| Red Hat Enterprise Virtualization | =4.0 | |
| Red Hat Enterprise Linux | =7.0 | |
| Debian | =8.0 |
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Reference Links
- http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=3592fe0c919cf27a81d8e9f9b4f269553418bb01
- http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html
- http://www.openwall.com/lists/oss-security/2016/10/14/9
- http://www.openwall.com/lists/oss-security/2016/10/15/5
- http://www.securityfocus.com/bid/93563
- 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/201611-11
- https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg02461.html
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1384910
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1384911
- http://seclists.org/oss-sec/2016/q4/137
- https://bugzilla.redhat.com/show_bug.cgi?id=1384909
Frequently Asked Questions
What is the severity of CVE-2016-8669?
CVE-2016-8669 is considered a high severity vulnerability due to its potential for denial of service.
How do I fix CVE-2016-8669?
To fix CVE-2016-8669, upgrade QEMU to version 2.7.1 or later.
Who is affected by CVE-2016-8669?
CVE-2016-8669 affects users of QEMU versions up to 2.7.1, as well as various versions of Red Hat OpenStack and openSUSE.
What type of attack does CVE-2016-8669 allow?
CVE-2016-8669 allows local guest OS administrators to perform a denial of service attack via a divide-by-zero error.
What software versions are vulnerable to CVE-2016-8669?
QEMU versions up to and including 2.7.1, along with certain versions of Red Hat OpenStack and openSUSE are vulnerable to CVE-2016-8669.
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