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CVE-2017-9605

Published: 13 June 2017

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.

From the Ubuntu security team

Murray McAllister discovered that the DRM driver for VMware Virtual GPUs in the Linux kernel did not properly initialize memory. A local attacker could use this to expose sensitive information (kernel memory).

Priority

Low

CVSS 3 base score: 5.5

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
Patches:
Introduced by a97e21923b421993258e8487f2a5700c1ba3897f
Fixed by 07678eca2cf9c9a18584e546c2b2a0d0c9a3150c
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-azure
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-euclid
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-gcp
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-kvm
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-oem
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (4.12~rc5)