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AUSCERT External Security Bulletin Redistribution
ESB-2018.1507
QEMU vulnerabilities patched in Ubuntu
17 May 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: qemu
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-7858 CVE-2018-7550 CVE-2017-16845
Reference: ESB-2018.1484
ESB-2018.1443
ESB-2018.1428.4
ESB-2018.0812
Original Bulletin:
http://www.ubuntu.com/usn/usn-3649-1
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==========================================================================
Ubuntu Security Notice USN-3649-1
May 16, 2018
qemu vulnerabilities
==========================================================================
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:
Several security issues were fixed in QEMU.
Software Description:
- - qemu: Machine emulator and virtualizer
Details:
Cyrille Chatras discovered that QEMU incorrectly handled certain PS2 values
during migration. An attacker could possibly use this issue to cause QEMU
to crash, resulting in a denial of service, or possibly execute arbitrary
code. This issue only affected Ubuntu 18.04 LTS. (CVE-2017-16845)
Cyrille Chatras discovered that QEMU incorrectly handled multiboot. An
attacker could use this issue to cause QEMU to crash, resulting in a denial
of service, or possibly execute arbitrary code on the host. In the default
installation, when QEMU is used with libvirt, attackers would be isolated
by the libvirt AppArmor profile. (CVE-2018-7550)
Ross Lagerwall discovered that QEMU incorrectly handled the Cirrus VGA
device. A privileged attacker inside the guest could use this issue to
cause QEMU to crash, resulting in a denial of service. This issue only
affected Ubuntu 17.10 and Ubuntu 18.04 LTS. (CVE-2018-7858)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS:
qemu-system 1:2.11+dfsg-1ubuntu7.1
qemu-system-arm 1:2.11+dfsg-1ubuntu7.1
qemu-system-mips 1:2.11+dfsg-1ubuntu7.1
qemu-system-ppc 1:2.11+dfsg-1ubuntu7.1
qemu-system-s390x 1:2.11+dfsg-1ubuntu7.1
qemu-system-sparc 1:2.11+dfsg-1ubuntu7.1
qemu-system-x86 1:2.11+dfsg-1ubuntu7.1
Ubuntu 17.10:
qemu-system 1:2.10+dfsg-0ubuntu3.6
qemu-system-aarch64 1:2.10+dfsg-0ubuntu3.6
qemu-system-arm 1:2.10+dfsg-0ubuntu3.6
qemu-system-mips 1:2.10+dfsg-0ubuntu3.6
qemu-system-ppc 1:2.10+dfsg-0ubuntu3.6
qemu-system-s390x 1:2.10+dfsg-0ubuntu3.6
qemu-system-sparc 1:2.10+dfsg-0ubuntu3.6
qemu-system-x86 1:2.10+dfsg-0ubuntu3.6
Ubuntu 16.04 LTS:
qemu-system 1:2.5+dfsg-5ubuntu10.28
qemu-system-aarch64 1:2.5+dfsg-5ubuntu10.28
qemu-system-arm 1:2.5+dfsg-5ubuntu10.28
qemu-system-mips 1:2.5+dfsg-5ubuntu10.28
qemu-system-ppc 1:2.5+dfsg-5ubuntu10.28
qemu-system-s390x 1:2.5+dfsg-5ubuntu10.28
qemu-system-sparc 1:2.5+dfsg-5ubuntu10.28
qemu-system-x86 1:2.5+dfsg-5ubuntu10.28
Ubuntu 14.04 LTS:
qemu-system 2.0.0+dfsg-2ubuntu1.41
qemu-system-aarch64 2.0.0+dfsg-2ubuntu1.41
qemu-system-arm 2.0.0+dfsg-2ubuntu1.41
qemu-system-mips 2.0.0+dfsg-2ubuntu1.41
qemu-system-ppc 2.0.0+dfsg-2ubuntu1.41
qemu-system-sparc 2.0.0+dfsg-2ubuntu1.41
qemu-system-x86 2.0.0+dfsg-2ubuntu1.41
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-3649-1
CVE-2017-16845, CVE-2018-7550, CVE-2018-7858
Package Information:
https://launchpad.net/ubuntu/+source/qemu/1:2.11+dfsg-1ubuntu7.1
https://launchpad.net/ubuntu/+source/qemu/1:2.10+dfsg-0ubuntu3.6
https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-5ubuntu10.28
https://launchpad.net/ubuntu/+source/qemu/2.0.0+dfsg-2ubuntu1.41
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