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AUSCERT External Security Bulletin Redistribution
ESB-2018.1746
QEMU update
13 June 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: qemu
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Access Privileged Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-3639
Reference: ASB-2018.0121
ESB-2018.1613
ESB-2018.1545
ESB-2018.1548.5
Original Bulletin:
http://www.ubuntu.com/usn/usn-3679-1
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Ubuntu Security Notice USN-3679-1
June 12, 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 AMD 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-1ubuntu7.3
qemu-system 1:2.11+dfsg-1ubuntu7.3
qemu-system-x86 1:2.11+dfsg-1ubuntu7.3
Ubuntu 17.10:
qemu 1:2.10+dfsg-0ubuntu3.8
qemu-system 1:2.10+dfsg-0ubuntu3.8
qemu-system-x86 1:2.10+dfsg-0ubuntu3.8
Ubuntu 16.04 LTS:
qemu 1:2.5+dfsg-5ubuntu10.30
qemu-system 1:2.5+dfsg-5ubuntu10.30
qemu-system-x86 1:2.5+dfsg-5ubuntu10.30
Ubuntu 14.04 LTS:
qemu 2.0.0+dfsg-2ubuntu1.43
qemu-system 2.0.0+dfsg-2ubuntu1.43
qemu-system-x86 2.0.0+dfsg-2ubuntu1.43
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-3679-1
CVE-2018-3639
Package Information:
https://launchpad.net/ubuntu/+source/qemu/1:2.11+dfsg-1ubuntu7.3
https://launchpad.net/ubuntu/+source/qemu/1:2.10+dfsg-0ubuntu3.8
https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-5ubuntu10.30
https://launchpad.net/ubuntu/+source/qemu/2.0.0+dfsg-2ubuntu1.43
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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
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