Rapid7 Vulnerability & Exploit Database

Oracle Linux: (CVE-2017-9605) ELSA-2020-5962: Unbreakable Enterprise kernel security update

Back to Search

Oracle Linux: (CVE-2017-9605) ELSA-2020-5962: Unbreakable Enterprise kernel security update

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:C/I:N/A:N)
Published
06/13/2017
Created
12/04/2020
Added
12/02/2020
Modified
12/02/2020

Description

The vmw_gb_surface_define_ioctl function (accessible via DRM_IOCTL_VMW_GB_SURFACE_CREATE) in drivers/gpu/drm/vmwgfx/vmwgfx_surface.c in the Linux kernel through 4.11.4 defines a backup_handle variable but does not give it an initial value. If one attempts to create a GB surface, with a previously allocated DMA buffer to be used as a backup buffer, the backup_handle variable does not get written to and is then later returned to user space, allowing local users to obtain sensitive information from uninitialized kernel memory via a crafted ioctl call.

Solution(s)

  • oracle-linux-upgrade-kernel-uek
  • oracle-linux-upgrade-kernel-uek-debug
  • oracle-linux-upgrade-kernel-uek-debug-devel
  • oracle-linux-upgrade-kernel-uek-devel
  • oracle-linux-upgrade-kernel-uek-doc
  • oracle-linux-upgrade-kernel-uek-firmware

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;