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FreeBSD: VID-AF19ECD0-0F6A-11E7-970F-002590263BF5 (CVE-2016-9603): xen-tools -- Cirrus VGA Heap overflow via display refresh

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FreeBSD: VID-AF19ECD0-0F6A-11E7-970F-002590263BF5 (CVE-2016-9603): xen-tools -- Cirrus VGA Heap overflow via display refresh

Severity
9
CVSS
(AV:N/AC:L/Au:S/C:C/I:C/A:C)
Published
03/14/2017
Created
07/25/2018
Added
03/23/2017
Modified
05/07/2019

Description

A heap buffer overflow flaw was found in QEMU's Cirrus CLGD 54xx VGA emulator's VNC display driver support before 2.9; the issue could occur when a VNC client attempted to update its display after a VGA operation is performed by a guest. A privileged user/process inside a guest could use this flaw to crash the QEMU process or, potentially, execute arbitrary code on the host with privileges of the QEMU process.

Solution(s)

  • freebsd-upgrade-package-xen-tools

References

  • CVE-2016-9603
  • USN-3261-1
  • USN-3268-1
  • DLA-939-1

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