Use-after-free in QEMU - CVE-2016-6833
Published: December 10, 2016 / Updated: August 9, 2020
Vulnerability identifier: #VU39991
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-2016-6833
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to perform a denial of service (DoS) attack.
Use-after-free vulnerability in the vmxnet3_io_bar0_write function in hw/net/vmxnet3.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (QEMU instance crash) by leveraging failure to check if the device is active.
Affected software
QEMU
SUSE Linux
SUSE Linux
How to mitigate CVE-2016-6833
Install update from vendor's website.
External References
- http://git.qemu.org/?p=qemu.git;a=commit;h=6c352ca9b4ee3e1e286ea9e8434bd8e69ac7d0d8
- http://www.openwall.com/lists/oss-security/2016/08/12/1
- http://www.openwall.com/lists/oss-security/2016/08/18/3
- http://www.securityfocus.com/bid/93255
- https://lists.debian.org/debian-lts-announce/2018/09/msg00007.html
- https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg01602.html
- https://security.gentoo.org/glsa/201609-01