Advisory Published

USN-3826-1: QEMU vulnerabilities

First published: Mon Nov 26 2018(Updated: )

Daniel Shapira and Arash Tohidi discovered that QEMU incorrectly handled NE2000 device emulation. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2018-10839) It was discovered that QEMU incorrectly handled the Slirp networking back-end. A privileged attacker inside the guest 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. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2018-11806) Fakhri Zulkifli discovered that the QEMU guest agent incorrectly handled certain QMP commands. An attacker could possibly use this issue to crash the QEMU guest agent, resulting in a denial of service. (CVE-2018-12617) Li Qiang discovered that QEMU incorrectly handled NVM Express Controller emulation. An attacker inside the guest 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. This issue only affected Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-16847) Daniel Shapira and Arash Tohidi discovered that QEMU incorrectly handled RTL8139 device emulation. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2018-17958) Daniel Shapira and Arash Tohidi discovered that QEMU incorrectly handled PCNET device emulation. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2018-17962) Daniel Shapira discovered that QEMU incorrectly handled large packet sizes. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2018-17963) It was discovered that QEMU incorrectly handled LSI53C895A device emulation. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2018-18849) Moguofang discovered that QEMU incorrectly handled the IPowerNV LPC controller. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-18954) Zhibin Hu discovered that QEMU incorrectly handled the Plan 9 File System support. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2018-19364)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/qemu-system<1:2.12+dfsg-3ubuntu8.1
1:2.12+dfsg-3ubuntu8.1
Ubuntu OpenSSH Client=18.10
All of
ubuntu/qemu-system-arm<1:2.12+dfsg-3ubuntu8.1
1:2.12+dfsg-3ubuntu8.1
Ubuntu OpenSSH Client=18.10
All of
ubuntu/qemu-system-mips<1:2.12+dfsg-3ubuntu8.1
1:2.12+dfsg-3ubuntu8.1
Ubuntu OpenSSH Client=18.10
All of
ubuntu/qemu-system-misc<1:2.12+dfsg-3ubuntu8.1
1:2.12+dfsg-3ubuntu8.1
Ubuntu OpenSSH Client=18.10
All of
ubuntu/qemu-system-ppc<1:2.12+dfsg-3ubuntu8.1
1:2.12+dfsg-3ubuntu8.1
Ubuntu OpenSSH Client=18.10
All of
ubuntu/qemu-system-s390x<1:2.12+dfsg-3ubuntu8.1
1:2.12+dfsg-3ubuntu8.1
Ubuntu OpenSSH Client=18.10
All of
ubuntu/qemu-system-sparc<1:2.12+dfsg-3ubuntu8.1
1:2.12+dfsg-3ubuntu8.1
Ubuntu OpenSSH Client=18.10
All of
ubuntu/qemu-system-x86<1:2.12+dfsg-3ubuntu8.1
1:2.12+dfsg-3ubuntu8.1
Ubuntu OpenSSH Client=18.10
All of
ubuntu/qemu-system<1:2.11+dfsg-1ubuntu7.8
1:2.11+dfsg-1ubuntu7.8
Ubuntu OpenSSH Client=18.04
All of
ubuntu/qemu-system-arm<1:2.11+dfsg-1ubuntu7.8
1:2.11+dfsg-1ubuntu7.8
Ubuntu OpenSSH Client=18.04
All of
ubuntu/qemu-system-mips<1:2.11+dfsg-1ubuntu7.8
1:2.11+dfsg-1ubuntu7.8
Ubuntu OpenSSH Client=18.04
All of
ubuntu/qemu-system-misc<1:2.11+dfsg-1ubuntu7.8
1:2.11+dfsg-1ubuntu7.8
Ubuntu OpenSSH Client=18.04
All of
ubuntu/qemu-system-ppc<1:2.11+dfsg-1ubuntu7.8
1:2.11+dfsg-1ubuntu7.8
Ubuntu OpenSSH Client=18.04
All of
ubuntu/qemu-system-s390x<1:2.11+dfsg-1ubuntu7.8
1:2.11+dfsg-1ubuntu7.8
Ubuntu OpenSSH Client=18.04
All of
ubuntu/qemu-system-sparc<1:2.11+dfsg-1ubuntu7.8
1:2.11+dfsg-1ubuntu7.8
Ubuntu OpenSSH Client=18.04
All of
ubuntu/qemu-system-x86<1:2.11+dfsg-1ubuntu7.8
1:2.11+dfsg-1ubuntu7.8
Ubuntu OpenSSH Client=18.04
All of
ubuntu/qemu-system<1:2.5+dfsg-5ubuntu10.33
1:2.5+dfsg-5ubuntu10.33
Ubuntu OpenSSH Client=16.04
All of
ubuntu/qemu-system-aarch64<1:2.5+dfsg-5ubuntu10.33
1:2.5+dfsg-5ubuntu10.33
Ubuntu OpenSSH Client=16.04
All of
ubuntu/qemu-system-arm<1:2.5+dfsg-5ubuntu10.33
1:2.5+dfsg-5ubuntu10.33
Ubuntu OpenSSH Client=16.04
All of
ubuntu/qemu-system-mips<1:2.5+dfsg-5ubuntu10.33
1:2.5+dfsg-5ubuntu10.33
Ubuntu OpenSSH Client=16.04
All of
ubuntu/qemu-system-misc<1:2.5+dfsg-5ubuntu10.33
1:2.5+dfsg-5ubuntu10.33
Ubuntu OpenSSH Client=16.04
All of
ubuntu/qemu-system-ppc<1:2.5+dfsg-5ubuntu10.33
1:2.5+dfsg-5ubuntu10.33
Ubuntu OpenSSH Client=16.04
All of
ubuntu/qemu-system-s390x<1:2.5+dfsg-5ubuntu10.33
1:2.5+dfsg-5ubuntu10.33
Ubuntu OpenSSH Client=16.04
All of
ubuntu/qemu-system-sparc<1:2.5+dfsg-5ubuntu10.33
1:2.5+dfsg-5ubuntu10.33
Ubuntu OpenSSH Client=16.04
All of
ubuntu/qemu-system-x86<1:2.5+dfsg-5ubuntu10.33
1:2.5+dfsg-5ubuntu10.33
Ubuntu OpenSSH Client=16.04
All of
ubuntu/qemu-system<2.0.0+dfsg-2ubuntu1.44
2.0.0+dfsg-2ubuntu1.44
Ubuntu OpenSSH Client=14.04
All of
ubuntu/qemu-system-aarch64<2.0.0+dfsg-2ubuntu1.44
2.0.0+dfsg-2ubuntu1.44
Ubuntu OpenSSH Client=14.04
All of
ubuntu/qemu-system-arm<2.0.0+dfsg-2ubuntu1.44
2.0.0+dfsg-2ubuntu1.44
Ubuntu OpenSSH Client=14.04
All of
ubuntu/qemu-system-mips<2.0.0+dfsg-2ubuntu1.44
2.0.0+dfsg-2ubuntu1.44
Ubuntu OpenSSH Client=14.04
All of
ubuntu/qemu-system-misc<2.0.0+dfsg-2ubuntu1.44
2.0.0+dfsg-2ubuntu1.44
Ubuntu OpenSSH Client=14.04
All of
ubuntu/qemu-system-ppc<2.0.0+dfsg-2ubuntu1.44
2.0.0+dfsg-2ubuntu1.44
Ubuntu OpenSSH Client=14.04
All of
ubuntu/qemu-system-sparc<2.0.0+dfsg-2ubuntu1.44
2.0.0+dfsg-2ubuntu1.44
Ubuntu OpenSSH Client=14.04
All of
ubuntu/qemu-system-x86<2.0.0+dfsg-2ubuntu1.44
2.0.0+dfsg-2ubuntu1.44
Ubuntu OpenSSH Client=14.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-3826-1?

    The severity of USN-3826-1 is classified as a denial of service vulnerability.

  • How do I fix USN-3826-1?

    To fix USN-3826-1, you need to upgrade to QEMU version 1:2.12+dfsg-3ubuntu8.1 or later.

  • What causes the vulnerability in USN-3826-1?

    The vulnerability in USN-3826-1 is caused by incorrect handling of NE2000 device emulation in QEMU.

  • Which systems are affected by USN-3826-1?

    USN-3826-1 affects Ubuntu version 18.10 with specific QEMU packages installed.

  • What happens if I am vulnerable to USN-3826-1?

    If vulnerable to USN-3826-1, an attacker inside the guest can crash QEMU, leading to a denial of service.

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