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Ubuntu 17.04 USN-3293-1 Critical: Kernel Denial Of Service Issues

ubuntu
Calendar Grey May 17, 2017
Dist Ubuntu Esm H88
Numerous vulnerabilities identified and addressed in the Linux kernel of Ubuntu 17.04, impacting both system reliability and security.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

- linux-raspi2: Linux kernel for Raspberry Pi 2

Details:

Dmitry Vyukov discovered that KVM implementation in the Linux kernel

improperly emulated the VMXON instruction. A local attacker in a guest OS

could use this to cause a denial of service (memory consumption) in the

host OS. (CVE-2017-2596)

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 Ren...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service information leak ubuntu system crash linux kernel memory consumption

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 17.04:
  linux-image-4.10.0-1005-raspi2  4.10.0-1005.7
  linux-image-4.10.0-21-generic   4.10.0-21.23
  linux-image-4.10.0-21-generic-lpae  4.10.0-21.23
  linux-image-4.10.0-21-lowlatency  4.10.0-21.23
  linux-image-generic             4.10.0.21.23
  linux-image-generic-lpae        4.10.0.21.23
  linux-image-lowlatency          4.10.0.21.23
  linux-image-raspi2              4.10.0.1005.7

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

https://ubuntu.com/security/notices/USN-3293-1

CVE-2017-2596, CVE-2017-7187, CVE-2017-7261, CVE-2017-7294,

CVE-2017-7477, CVE-2017-7616

Severity
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Critical

May 17, 2017

Topics%20covered

Topics Covered

security advisory denial of service information leak ubuntu system crash linux kernel memory consumption

Package Information

https://launchpad.net/ubuntu/+source/linux/4.10.0-21.23
https://launchpad.net/ubuntu/+source/linux-raspi2/4.10.0-1005.7

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