Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Qemu | Qemu | <= 2.6.2 |
| Debian | Debian Linux | 8.0 |
Related Weaknesses (CWE)
References
- http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=6c352ca9b4ee3e1e286ea9e8434bd8e69
- http://www.openwall.com/lists/oss-security/2016/08/12/1Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/08/18/3Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/93255Third Party AdvisoryVDB Entry
- https://lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlMailing ListThird Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg01602.htmlMailing ListPatchThird Party Advisory
- https://security.gentoo.org/glsa/201609-01Third Party Advisory
- http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=6c352ca9b4ee3e1e286ea9e8434bd8e69
- http://www.openwall.com/lists/oss-security/2016/08/12/1Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/08/18/3Mailing ListThird Party Advisory
- http://www.securityfocus.com/bid/93255Third Party AdvisoryVDB Entry
- https://lists.debian.org/debian-lts-announce/2018/09/msg00007.htmlMailing ListThird Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg01602.htmlMailing ListPatchThird Party Advisory
- https://security.gentoo.org/glsa/201609-01Third Party Advisory
FAQ
What is CVE-2016-6833?
CVE-2016-6833 is a vulnerability with a CVSS score of 4.4 (MEDIUM). 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 cra...
How severe is CVE-2016-6833?
CVE-2016-6833 has been rated MEDIUM with a CVSS base score of 4.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2016-6833?
Check the references section above for vendor advisories and patch information. Affected products include: Qemu Qemu, Debian Debian Linux.