Ubuntu Security Notice USN-3291-3
17th May, 2017
linux-lts-xenial vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
Several security issues were fixed in the kernel.
Software description
USN-3291-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.
Dmitry Vyukov discovered that the generic SCSI (sg) subsystem in the Linux
kernel contained a stack-based buffer overflow. A local attacker with
access to an sg device could use this to cause a denial of service (system
crash) or possibly execute arbitrary code. (CVE-2017-7187)
It was discovered that a NULL pointer dereference existed in the Direct
Rendering Manager (DRM) driver for VMWare devices in the Linux kernel. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2017-7261)
Li Qiang discovered that an integer overflow vulnerability existed in the
Direct Rendering Manager (DRM) driver for VMWare devices in the Linux
kernel. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2017-7294)
It was discovered that an information leak existed in the set_mempolicy and
mbind compat syscalls in the Linux kernel. A local attacker could use this
to expose sensitive information (kernel memory). (CVE-2017-7616)
Update instructions
The problem can be corrected by updating your system to the following package version:
Ubuntu 14.04 LTS:
linux-image-powerpc-smp-lts-xenial 4.4.0.78.63
linux-image-generic-lpae-lts-xenial 4.4.0.78.63
linux-image-4.4.0-78-generic-lpae 4.4.0-78.99~14.04.2
linux-image-4.4.0-78-powerpc64-emb 4.4.0-78.99~14.04.2
linux-image-4.4.0-78-powerpc-smp 4.4.0-78.99~14.04.2
linux-image-4.4.0-78-lowlatency 4.4.0-78.99~14.04.2
linux-image-lowlatency-lts-xenial 4.4.0.78.63
linux-image-generic-lts-xenial 4.4.0.78.63
linux-image-4.4.0-78-generic 4.4.0-78.99~14.04.2
linux-image-powerpc64-smp-lts-xenial 4.4.0.78.63
linux-image-powerpc64-emb-lts-xenial 4.4.0.78.63
linux-image-4.4.0-78-powerpc-e500mc 4.4.0-78.99~14.04.2
linux-image-powerpc-e500mc-lts-xenial 4.4.0.78.63
linux-image-4.4.0-78-powerpc64-smp 4.4.0-78.99~14.04.2
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.
References
CVE-2017-7187, CVE-2017-7261, CVE-2017-7294, CVE-2017-7616
Continue reading...
17th May, 2017
linux-lts-xenial vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 LTS
Several security issues were fixed in the kernel.
Software description
- linux-lts-xenial - Linux hardware enablement kernel from Xenial for Trusty
USN-3291-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.
Dmitry Vyukov discovered that the generic SCSI (sg) subsystem in the Linux
kernel contained a stack-based buffer overflow. A local attacker with
access to an sg device could use this to cause a denial of service (system
crash) or possibly execute arbitrary code. (CVE-2017-7187)
It was discovered that a NULL pointer dereference existed in the Direct
Rendering Manager (DRM) driver for VMWare devices in the Linux kernel. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2017-7261)
Li Qiang discovered that an integer overflow vulnerability existed in the
Direct Rendering Manager (DRM) driver for VMWare devices in the Linux
kernel. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2017-7294)
It was discovered that an information leak existed in the set_mempolicy and
mbind compat syscalls in the Linux kernel. A local attacker could use this
to expose sensitive information (kernel memory). (CVE-2017-7616)
Update instructions
The problem can be corrected by updating your system to the following package version:
Ubuntu 14.04 LTS:
linux-image-powerpc-smp-lts-xenial 4.4.0.78.63
linux-image-generic-lpae-lts-xenial 4.4.0.78.63
linux-image-4.4.0-78-generic-lpae 4.4.0-78.99~14.04.2
linux-image-4.4.0-78-powerpc64-emb 4.4.0-78.99~14.04.2
linux-image-4.4.0-78-powerpc-smp 4.4.0-78.99~14.04.2
linux-image-4.4.0-78-lowlatency 4.4.0-78.99~14.04.2
linux-image-lowlatency-lts-xenial 4.4.0.78.63
linux-image-generic-lts-xenial 4.4.0.78.63
linux-image-4.4.0-78-generic 4.4.0-78.99~14.04.2
linux-image-powerpc64-smp-lts-xenial 4.4.0.78.63
linux-image-powerpc64-emb-lts-xenial 4.4.0.78.63
linux-image-4.4.0-78-powerpc-e500mc 4.4.0-78.99~14.04.2
linux-image-powerpc-e500mc-lts-xenial 4.4.0.78.63
linux-image-4.4.0-78-powerpc64-smp 4.4.0-78.99~14.04.2
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.
References
CVE-2017-7187, CVE-2017-7261, CVE-2017-7294, CVE-2017-7616
Continue reading...
