==========================================================================
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
—–BEGIN PGP SIGNATURE—–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=LfsV
—–END PGP SIGNATURE—–
—
