exploit the possibilities

Ubuntu Security Notice USN-3651-1

Ubuntu Security Notice USN-3651-1
Posted May 21, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3651-1 - Ken Johnson and Jann Horn independently discovered that microprocessors utilizing speculative execution of a memory read may allow unauthorized memory reads via sidechannel attacks. An attacker in the guest could use this to expose sensitive guest information, including kernel memory. This update allows QEMU to expose new CPU features added by microcode updates to guests on amd64 and i386.

tags | advisory, kernel
systems | linux, ubuntu
advisories | CVE-2018-3639
MD5 | 37d74fc3cc5c45d86571a4d0fe217013

Ubuntu Security Notice USN-3651-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3651-1
May 21, 2018

qemu update
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS
- Ubuntu 17.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Side channel execution mitigations were added to QEMU.

Software Description:
- qemu: Machine emulator and virtualizer

Details:

Ken Johnson and Jann Horn independently discovered that microprocessors utilizing
speculative execution of a memory read may allow unauthorized memory reads via
sidechannel attacks. An attacker in the guest could use this to expose sensitive
guest information, including kernel memory. This update allows QEMU to expose new
CPU features added by microcode updates to guests on amd64 and i386.

Update instructions:

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

Ubuntu 18.04 LTS:
qemu 1:2.11+dfsg-1ubuntu7.2
qemu-system 1:2.11+dfsg-1ubuntu7.2
qemu-system-x86 1:2.11+dfsg-1ubuntu7.2

Ubuntu 17.10:
qemu 1:2.10+dfsg-0ubuntu3.7
qemu-system 1:2.10+dfsg-0ubuntu3.7
qemu-system-x86 1:2.10+dfsg-0ubuntu3.7

Ubuntu 16.04 LTS:
qemu 1:2.5+dfsg-5ubuntu10.29
qemu-system 1:2.5+dfsg-5ubuntu10.29
qemu-system-x86 1:2.5+dfsg-5ubuntu10.29

Ubuntu 14.04 LTS:
qemu 2.0.0+dfsg-2ubuntu1.42
qemu-system 2.0.0+dfsg-2ubuntu1.42
qemu-system-x86 2.0.0+dfsg-2ubuntu1.42

After a standard system update you need to restart all QEMU virtual
machines to make all the necessary changes.

References:
https://usn.ubuntu.com/usn/usn-3651-1
CVE-2018-3639, https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/Variant4

Package Information:
https://launchpad.net/ubuntu/+source/qemu/1:2.11+dfsg-1ubuntu7.2
https://launchpad.net/ubuntu/+source/qemu/1:2.10+dfsg-0ubuntu3.7
https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-5ubuntu10.29
https://launchpad.net/ubuntu/+source/qemu/2.0.0+dfsg-2ubuntu1.42

Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

File Archive:

April 2019

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Apr 1st
    21 Files
  • 2
    Apr 2nd
    35 Files
  • 3
    Apr 3rd
    21 Files
  • 4
    Apr 4th
    16 Files
  • 5
    Apr 5th
    15 Files
  • 6
    Apr 6th
    1 Files
  • 7
    Apr 7th
    2 Files
  • 8
    Apr 8th
    23 Files
  • 9
    Apr 9th
    19 Files
  • 10
    Apr 10th
    15 Files
  • 11
    Apr 11th
    14 Files
  • 12
    Apr 12th
    11 Files
  • 13
    Apr 13th
    2 Files
  • 14
    Apr 14th
    5 Files
  • 15
    Apr 15th
    14 Files
  • 16
    Apr 16th
    19 Files
  • 17
    Apr 17th
    19 Files
  • 18
    Apr 18th
    8 Files
  • 19
    Apr 19th
    4 Files
  • 20
    Apr 20th
    5 Files
  • 21
    Apr 21st
    1 Files
  • 22
    Apr 22nd
    10 Files
  • 23
    Apr 23rd
    22 Files
  • 24
    Apr 24th
    11 Files
  • 25
    Apr 25th
    15 Files
  • 26
    Apr 26th
    0 Files
  • 27
    Apr 27th
    0 Files
  • 28
    Apr 28th
    0 Files
  • 29
    Apr 29th
    0 Files
  • 30
    Apr 30th
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2019 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close