Division by zero in QEMU - CVE-2016-8667
Published: November 4, 2016 / Updated: August 9, 2020
Vulnerability identifier: #VU40051
CSH Severity: Low
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2016-8667
CWE-ID: CWE-369
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to a crash the entire system.
The rc4030_write function in hw/dma/rc4030.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 a large interval timer reload value.
Affected software
QEMU
Fedora
qemu
Fedora
qemu
How to mitigate CVE-2016-8667
Install update from vendor's website.
qemu - addressed in versions 2.6.2-8.fc24, 2.7.1-6.fc25
External References
- http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html
- http://www.openwall.com/lists/oss-security/2016/10/14/6
- http://www.openwall.com/lists/oss-security/2016/10/15/4
- http://www.securityfocus.com/bid/93567
- https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html
- https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg02577.html