Input validation error in QEMU - CVE-2016-6490
Published: December 10, 2016 / Updated: August 9, 2020
Vulnerability identifier: #VU39992
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2016-6490
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: QEMU
Affected software:
QEMU
QEMU
Detailed vulnerability description
The vulnerability allows a local privileged user to perform a denial of service (DoS) attack.
The virtqueue_map_desc function in hw/virtio/virtio.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a zero length for the descriptor buffer.
How to mitigate CVE-2016-6490
Install update from vendor's website.
Sources
- http://git.qemu.org/?p=qemu.git;a=commit;h=1e7aed70144b4673fc26e73062064b6724795e5f
- http://www.openwall.com/lists/oss-security/2016/07/28/4
- http://www.openwall.com/lists/oss-security/2016/07/28/9
- https://lists.gnu.org/archive/html/qemu-devel/2016-07/msg06246.html
- https://security.gentoo.org/glsa/201609-01